diff options
Diffstat (limited to 'drivers/gpio')
27 files changed, 1746 insertions, 570 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d5d36549ecc1..05043071fc98 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -185,6 +185,13 @@ config GPIO_ETRAXFS help Say yes here to support the GPIO controller on Axis ETRAX FS SoCs. +config GPIO_EXAR + tristate "Support for GPIO pins on XR17V352/354/358" + depends on SERIAL_8250_EXAR + help + Selecting this option will enable handling of GPIO pins present + on Exar XR17V352/354/358 chips. + config GPIO_GE_FPGA bool "GE FPGA based GPIO" depends on GE_FPGA @@ -197,6 +204,15 @@ config GPIO_GE_FPGA and write pin state) for GPIO implemented in a number of GE single board computers. +config GPIO_GEMINI + bool "Gemini GPIO" + depends on ARCH_GEMINI + depends on OF_GPIO + select GPIO_GENERIC + select GPIOLIB_IRQCHIP + help + Support for common GPIOs found in Cortina systems Gemini platforms. + config GPIO_GENERIC_PLATFORM tristate "Generic memory-mapped GPIO controller support (MMIO platform device)" select GPIO_GENERIC @@ -282,6 +298,8 @@ config GPIO_MOCKUP tristate "GPIO Testing Driver" depends on GPIOLIB && SYSFS select GPIO_SYSFS + select GPIOLIB_IRQCHIP + select IRQ_WORK help This enables GPIO Testing driver, which provides a way to test GPIO subsystem through sysfs(or char device) and debugfs. GPIO_SYSFS @@ -1141,6 +1159,15 @@ config GPIO_PCH ML7223/ML7831 is companion chip for Intel Atom E6xx series. ML7223/ML7831 is completely compatible for Intel EG20T PCH. +config GPIO_PCI_IDIO_16 + tristate "ACCES PCI-IDIO-16 GPIO support" + select GPIOLIB_IRQCHIP + help + Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is + generated when any of the inputs change state (low to high or high to + low). Input filter control is not supported by this driver, and the + input filters are deactivated by this driver. + config GPIO_RDC321X tristate "RDC R-321x GPIO support" select MFD_CORE @@ -1197,6 +1224,8 @@ config GPIO_MCP23S08 tristate "Microchip MCP23xxx I/O expander" depends on OF_GPIO select GPIOLIB_IRQCHIP + select REGMAP_I2C if I2C + select REGMAP if SPI_MASTER help SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 I/O expanders. diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a7676b82de6f..becb96c724fe 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -46,8 +46,10 @@ obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o obj-$(CONFIG_GPIO_EM) += gpio-em.o obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o obj-$(CONFIG_GPIO_ETRAXFS) += gpio-etraxfs.o +obj-$(CONFIG_GPIO_EXAR) += gpio-exar.o obj-$(CONFIG_GPIO_F7188X) += gpio-f7188x.o obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o +obj-$(CONFIG_GPIO_GEMINI) += gpio-gemini.o obj-$(CONFIG_GPIO_GPIO_MM) += gpio-gpio-mm.o obj-$(CONFIG_GPIO_GRGPIO) += gpio-grgpio.o obj-$(CONFIG_HTC_EGPIO) += gpio-htc-egpio.o @@ -90,6 +92,7 @@ obj-$(CONFIG_GPIO_OMAP) += gpio-omap.o obj-$(CONFIG_GPIO_PCA953X) += gpio-pca953x.o obj-$(CONFIG_GPIO_PCF857X) += gpio-pcf857x.o obj-$(CONFIG_GPIO_PCH) += gpio-pch.o +obj-$(CONFIG_GPIO_PCI_IDIO_16) += gpio-pci-idio-16.o obj-$(CONFIG_GPIO_PISOSR) += gpio-pisosr.o obj-$(CONFIG_GPIO_PL061) += gpio-pl061.o obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c index b760cbbb41d8..7031eea165c9 100644 --- a/drivers/gpio/devres.c +++ b/drivers/gpio/devres.c @@ -11,7 +11,7 @@ * * This file is based on kernel/irq/devres.c * - * Copyright (c) 2011 John Crispin <blogic@openwrt.org> + * Copyright (c) 2011 John Crispin <john@phrozen.org> */ #include <linux/module.h> @@ -21,6 +21,8 @@ #include <linux/device.h> #include <linux/gfp.h> +#include "gpiolib.h" + static void devm_gpiod_release(struct device *dev, void *res) { struct gpio_desc **desc = res; @@ -123,19 +125,26 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev, EXPORT_SYMBOL(devm_gpiod_get_index); /** - * devm_get_gpiod_from_child - get a GPIO descriptor from a device's child node + * devm_fwnode_get_index_gpiod_from_child - get a GPIO descriptor from a + * device's child node * @dev: GPIO consumer * @con_id: function within the GPIO consumer + * @index: index of the GPIO to obtain in the consumer * @child: firmware node (child of @dev) + * @flags: GPIO initialization flags * * GPIO descriptors returned from this function are automatically disposed on * driver detach. + * + * On successfull request the GPIO pin is configured in accordance with + * provided @flags. */ -struct gpio_desc *devm_get_gpiod_from_child(struct device *dev, - const char *con_id, - struct fwnode_handle *child) +struct gpio_desc *devm_fwnode_get_index_gpiod_from_child(struct device *dev, + const char *con_id, int index, + struct fwnode_handle *child, + enum gpiod_flags flags, + const char *label) { - static const char * const suffixes[] = { "gpios", "gpio" }; char prop_name[32]; /* 32 is max size of property name */ struct gpio_desc **dr; struct gpio_desc *desc; @@ -146,15 +155,16 @@ struct gpio_desc *devm_get_gpiod_from_child(struct device *dev, if (!dr) return ERR_PTR(-ENOMEM); - for (i = 0; i < ARRAY_SIZE(suffixes); i++) { + for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { if (con_id) snprintf(prop_name, sizeof(prop_name), "%s-%s", - con_id, suffixes[i]); + con_id, gpio_suffixes[i]); else snprintf(prop_name, sizeof(prop_name), "%s", - suffixes[i]); + gpio_suffixes[i]); - desc = fwnode_get_named_gpiod(child, prop_name); + desc = fwnode_get_named_gpiod(child, prop_name, index, flags, + label); if (!IS_ERR(desc) || (PTR_ERR(desc) != -ENOENT)) break; } @@ -168,7 +178,7 @@ struct gpio_desc *devm_get_gpiod_from_child(struct device *dev, return desc; } -EXPORT_SYMBOL(devm_get_gpiod_from_child); +EXPORT_SYMBOL(devm_fwnode_get_index_gpiod_from_child); /** * devm_gpiod_get_index_optional - Resource-managed gpiod_get_index_optional() diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c index fcf776971ca9..17bd2ab4ebe2 100644 --- a/drivers/gpio/gpio-104-dio-48e.c +++ b/drivers/gpio/gpio-104-dio-48e.c @@ -48,7 +48,6 @@ MODULE_PARM_DESC(irq, "ACCES 104-DIO-48E interrupt line numbers"); * @control: Control registers state * @lock: synchronization lock to prevent I/O race conditions * @base: base port address of the GPIO device - * @irq: Interrupt line number * @irq_mask: I/O bits affected by interrupts */ struct dio48e_gpio { @@ -58,7 +57,6 @@ struct dio48e_gpio { unsigned char control[2]; spinlock_t lock; unsigned base; - unsigned irq; unsigned char irq_mask; }; @@ -204,6 +202,44 @@ static void dio48e_gpio_set(struct gpio_chip *chip, unsigned offset, int value) spin_unlock_irqrestore(&dio48egpio->lock, flags); } +static void dio48e_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip); + unsigned int i; + const unsigned int gpio_reg_size = 8; + unsigned int port; + unsigned int out_port; + unsigned int bitmask; + unsigned long flags; + + /* set bits are evaluated a gpio register size at a time */ + for (i = 0; i < chip->ngpio; i += gpio_reg_size) { + /* no more set bits in this mask word; skip to the next word */ + if (!mask[BIT_WORD(i)]) { + i = (BIT_WORD(i) + 1) * BITS_PER_LONG - gpio_reg_size; + continue; + } + + port = i / gpio_reg_size; + out_port = (port > 2) ? port + 1 : port; + bitmask = mask[BIT_WORD(i)] & bits[BIT_WORD(i)]; + + spin_lock_irqsave(&dio48egpio->lock, flags); + + /* update output state data and set device gpio register */ + dio48egpio->out_state[port] &= ~mask[BIT_WORD(i)]; + dio48egpio->out_state[port] |= bitmask; + outb(dio48egpio->out_state[port], dio48egpio->base + out_port); + + spin_unlock_irqrestore(&dio48egpio->lock, flags); + + /* prepare for next gpio register set */ + mask[BIT_WORD(i)] >>= gpio_reg_size; + bits[BIT_WORD(i)] >>= gpio_reg_size; + } +} + static void dio48e_irq_ack(struct irq_data *data) { } @@ -302,6 +338,26 @@ static irqreturn_t dio48e_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +#define DIO48E_NGPIO 48 +static const char *dio48e_names[DIO48E_NGPIO] = { + "PPI Group 0 Port A 0", "PPI Group 0 Port A 1", "PPI Group 0 Port A 2", + "PPI Group 0 Port A 3", "PPI Group 0 Port A 4", "PPI Group 0 Port A 5", + "PPI Group 0 Port A 6", "PPI Group 0 Port A 7", "PPI Group 0 Port B 0", + "PPI Group 0 Port B 1", "PPI Group 0 Port B 2", "PPI Group 0 Port B 3", + "PPI Group 0 Port B 4", "PPI Group 0 Port B 5", "PPI Group 0 Port B 6", + "PPI Group 0 Port B 7", "PPI Group 0 Port C 0", "PPI Group 0 Port C 1", + "PPI Group 0 Port C 2", "PPI Group 0 Port C 3", "PPI Group 0 Port C 4", + "PPI Group 0 Port C 5", "PPI Group 0 Port C 6", "PPI Group 0 Port C 7", + "PPI Group 1 Port A 0", "PPI Group 1 Port A 1", "PPI Group 1 Port A 2", + "PPI Group 1 Port A 3", "PPI Group 1 Port A 4", "PPI Group 1 Port A 5", + "PPI Group 1 Port A 6", "PPI Group 1 Port A 7", "PPI Group 1 Port B 0", + "PPI Group 1 Port B 1", "PPI Group 1 Port B 2", "PPI Group 1 Port B 3", + "PPI Group 1 Port B 4", "PPI Group 1 Port B 5", "PPI Group 1 Port B 6", + "PPI Group 1 Port B 7", "PPI Group 1 Port C 0", "PPI Group 1 Port C 1", + "PPI Group 1 Port C 2", "PPI Group 1 Port C 3", "PPI Group 1 Port C 4", + "PPI Group 1 Port C 5", "PPI Group 1 Port C 6", "PPI Group 1 Port C 7" +}; + static int dio48e_probe(struct device *dev, unsigned int id) { struct dio48e_gpio *dio48egpio; @@ -322,20 +378,19 @@ static int dio48e_probe(struct device *dev, unsigned int id) dio48egpio->chip.parent = dev; dio48egpio->chip.owner = THIS_MODULE; dio48egpio->chip.base = -1; - dio48egpio->chip.ngpio = 48; + dio48egpio->chip.ngpio = DIO48E_NGPIO; + dio48egpio->chip.names = dio48e_names; dio48egpio->chip.get_direction = dio48e_gpio_get_direction; dio48egpio->chip.direction_input = dio48e_gpio_direction_input; dio48egpio->chip.direction_output = dio48e_gpio_direction_output; dio48egpio->chip.get = dio48e_gpio_get; dio48egpio->chip.set = dio48e_gpio_set; + dio48egpio->chip.set_multiple = dio48e_gpio_set_multiple; dio48egpio->base = base[id]; - dio48egpio->irq = irq[id]; spin_lock_init(&dio48egpio->lock); - dev_set_drvdata(dev, dio48egpio); - - err = gpiochip_add_data(&dio48egpio->chip, dio48egpio); + err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); return err; @@ -360,30 +415,17 @@ static int dio48e_probe(struct device *dev, unsigned int id) handle_edge_irq, IRQ_TYPE_NONE); if (err) { dev_err(dev, "Could not add irqchip (%d)\n", err); - goto err_gpiochip_remove; + return err; } - err = request_irq(irq[id], dio48e_irq_handler, 0, name, dio48egpio); + err = devm_request_irq(dev, irq[id], dio48e_irq_handler, 0, name, + dio48egpio); if (err) { dev_err(dev, "IRQ handler registering failed (%d)\n", err); - goto err_gpiochip_remove; + return err; } return 0; - -err_gpiochip_remove: - gpiochip_remove(&dio48egpio->chip); - return err; -} - -static int dio48e_remove(struct device *dev, unsigned int id) -{ - struct dio48e_gpio *const dio48egpio = dev_get_drvdata(dev); - - free_irq(dio48egpio->irq, dio48egpio); - gpiochip_remove(&dio48egpio->chip); - - return 0; } static struct isa_driver dio48e_driver = { @@ -391,7 +433,6 @@ static struct isa_driver dio48e_driver = { .driver = { .name = "104-dio-48e" }, - .remove = dio48e_remove }; module_isa_driver(dio48e_driver, num_dio48e); diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c index 2d2763ea1a68..568375a7ebc2 100644 --- a/drivers/gpio/gpio-104-idi-48.c +++ b/drivers/gpio/gpio-104-idi-48.c @@ -47,7 +47,6 @@ MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line numbers"); * @ack_lock: synchronization lock to prevent IRQ handler race conditions * @irq_mask: input bits affected by interrupts * @base: base port address of the GPIO device - * @irq: Interrupt line number * @cos_enb: Change-Of-State IRQ enable boundaries mask */ struct idi_48_gpio { @@ -56,7 +55,6 @@ struct idi_48_gpio { spinlock_t ack_lock; unsigned char irq_mask[6]; unsigned base; - unsigned irq; unsigned char cos_enb; }; @@ -219,6 +217,18 @@ static irqreturn_t idi_48_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +#define IDI48_NGPIO 48 +static const char *idi48_names[IDI48_NGPIO] = { + "Bit 0 A", "Bit 1 A", "Bit 2 A", "Bit 3 A", "Bit 4 A", "Bit 5 A", + "Bit 6 A", "Bit 7 A", "Bit 8 A", "Bit 9 A", "Bit 10 A", "Bit 11 A", + "Bit 12 A", "Bit 13 A", "Bit 14 A", "Bit 15 A", "Bit 16 A", "Bit 17 A", + "Bit 18 A", "Bit 19 A", "Bit 20 A", "Bit 21 A", "Bit 22 A", "Bit 23 A", + "Bit 0 B", "Bit 1 B", "Bit 2 B", "Bit 3 B", "Bit 4 B", "Bit 5 B", + "Bit 6 B", "Bit 7 B", "Bit 8 B", "Bit 9 B", "Bit 10 B", "Bit 11 B", + "Bit 12 B", "Bit 13 B", "Bit 14 B", "Bit 15 B", "Bit 16 B", "Bit 17 B", + "Bit 18 B", "Bit 19 B", "Bit 20 B", "Bit 21 B", "Bit 22 B", "Bit 23 B" +}; + static int idi_48_probe(struct device *dev, unsigned int id) { struct idi_48_gpio *idi48gpio; @@ -239,19 +249,17 @@ static int idi_48_probe(struct device *dev, unsigned int id) idi48gpio->chip.parent = dev; idi48gpio->chip.owner = THIS_MODULE; idi48gpio->chip.base = -1; - idi48gpio->chip.ngpio = 48; + idi48gpio->chip.ngpio = IDI48_NGPIO; + idi48gpio->chip.names = idi48_names; idi48gpio->chip.get_direction = idi_48_gpio_get_direction; idi48gpio->chip.direction_input = idi_48_gpio_direction_input; idi48gpio->chip.get = idi_48_gpio_get; idi48gpio->base = base[id]; - idi48gpio->irq = irq[id]; spin_lock_init(&idi48gpio->lock); spin_lock_init(&idi48gpio->ack_lock); - dev_set_drvdata(dev, idi48gpio); - - err = gpiochip_add_data(&idi48gpio->chip, idi48gpio); + err = devm_gpiochip_add_data(dev, &idi48gpio->chip, idi48gpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); return err; @@ -265,31 +273,17 @@ static int idi_48_probe(struct device *dev, unsigned int id) handle_edge_irq, IRQ_TYPE_NONE); if (err) { dev_err(dev, "Could not add irqchip (%d)\n", err); - goto err_gpiochip_remove; + return err; } - err = request_irq(irq[id], idi_48_irq_handler, IRQF_SHARED, name, - idi48gpio); + err = devm_request_irq(dev, irq[id], idi_48_irq_handler, IRQF_SHARED, + name, idi48gpio); if (err) { dev_err(dev, "IRQ handler registering failed (%d)\n", err); - goto err_gpiochip_remove; + return err; } return 0; - -err_gpiochip_remove: - gpiochip_remove(&idi48gpio->chip); - return err; -} - -static int idi_48_remove(struct device *dev, unsigned int id) -{ - struct idi_48_gpio *const idi48gpio = dev_get_drvdata(dev); - - free_irq(idi48gpio->irq, idi48gpio); - gpiochip_remove(&idi48gpio->chip); - - return 0; } static struct isa_driver idi_48_driver = { @@ -297,7 +291,6 @@ static struct isa_driver idi_48_driver = { .driver = { .name = "104-idi-48" }, - .remove = idi_48_remove }; module_isa_driver(idi_48_driver, num_idi_48); diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c index 6787b8fcf0d8..7053cf736648 100644 --- a/drivers/gpio/gpio-104-idio-16.c +++ b/drivers/gpio/gpio-104-idio-16.c @@ -46,7 +46,6 @@ MODULE_PARM_DESC(irq, "ACCES 104-IDIO-16 interrupt line numbers"); * @lock: synchronization lock to prevent I/O race conditions * @irq_mask: I/O bits affected by interrupts * @base: base port address of the GPIO device - * @irq: Interrupt line number * @out_state: output bits state */ struct idio_16_gpio { @@ -54,7 +53,6 @@ struct idio_16_gpio { spinlock_t lock; unsigned long irq_mask; unsigned base; - unsigned irq; unsigned out_state; }; @@ -116,6 +114,25 @@ static void idio_16_gpio_set(struct gpio_chip *chip, unsigned offset, int value) spin_unlock_irqrestore(&idio16gpio->lock, flags); } +static void idio_16_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + unsigned long flags; + + spin_lock_irqsave(&idio16gpio->lock, flags); + + idio16gpio->out_state &= ~*mask; + idio16gpio->out_state |= *mask & *bits; + + if (*mask & 0xFF) + outb(idio16gpio->out_state, idio16gpio->base); + if ((*mask >> 8) & 0xFF) + outb(idio16gpio->out_state >> 8, idio16gpio->base + 4); + + spin_unlock_irqrestore(&idio16gpio->lock, flags); +} + static void idio_16_irq_ack(struct irq_data *data) { } @@ -193,6 +210,14 @@ static irqreturn_t idio_16_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +#define IDIO_16_NGPIO 32 +static const char *idio_16_names[IDIO_16_NGPIO] = { + "OUT0", "OUT1", "OUT2", "OUT3", "OUT4", "OUT5", "OUT6", "OUT7", + "OUT8", "OUT9", "OUT10", "OUT11", "OUT12", "OUT13", "OUT14", "OUT15", + "IIN0", "IIN1", "IIN2", "IIN3", "IIN4", "IIN5", "IIN6", "IIN7", + "IIN8", "IIN9", "IIN10", "IIN11", "IIN12", "IIN13", "IIN14", "IIN15" +}; + static int idio_16_probe(struct device *dev, unsigned int id) { struct idio_16_gpio *idio16gpio; @@ -213,21 +238,20 @@ static int idio_16_probe(struct device *dev, unsigned int id) idio16gpio->chip.parent = dev; idio16gpio->chip.owner = THIS_MODULE; idio16gpio->chip.base = -1; - idio16gpio->chip.ngpio = 32; + idio16gpio->chip.ngpio = IDIO_16_NGPIO; + idio16gpio->chip.names = idio_16_names; idio16gpio->chip.get_direction = idio_16_gpio_get_direction; idio16gpio->chip.direction_input = idio_16_gpio_direction_input; idio16gpio->chip.direction_output = idio_16_gpio_direction_output; idio16gpio->chip.get = idio_16_gpio_get; idio16gpio->chip.set = idio_16_gpio_set; + idio16gpio->chip.set_multiple = idio_16_gpio_set_multiple; idio16gpio->base = base[id]; - idio16gpio->irq = irq[id]; idio16gpio->out_state = 0xFFFF; spin_lock_init(&idio16gpio->lock); - dev_set_drvdata(dev, idio16gpio); - - err = gpiochip_add_data(&idio16gpio->chip, idio16gpio); + err = devm_gpiochip_add_data(dev, &idio16gpio->chip, idio16gpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); return err; @@ -241,30 +265,17 @@ static int idio_16_probe(struct device *dev, unsigned int id) handle_edge_irq, IRQ_TYPE_NONE); if (err) { dev_err(dev, "Could not add irqchip (%d)\n", err); - goto err_gpiochip_remove; + return err; } - err = request_irq(irq[id], idio_16_irq_handler, 0, name, idio16gpio); + err = devm_request_irq(dev, irq[id], idio_16_irq_handler, 0, name, + idio16gpio); if (err) { dev_err(dev, "IRQ handler registering failed (%d)\n", err); - goto err_gpiochip_remove; + return err; } return 0; - -err_gpiochip_remove: - gpiochip_remove(&idio16gpio->chip); - return err; -} - -static int idio_16_remove(struct device *dev, unsigned int id) -{ - struct idio_16_gpio *const idio16gpio = dev_get_drvdata(dev); - - free_irq(idio16gpio->irq, idio16gpio); - gpiochip_remove(&idio16gpio->chip); - - return 0; } static struct isa_driver idio_16_driver = { @@ -272,7 +283,6 @@ static struct isa_driver idio_16_driver = { .driver = { .name = "104-idio-16" }, - .remove = idio_16_remove }; module_isa_driver(idio_16_driver, num_idio_16); diff --git a/drivers/gpio/gpio-altera-a10sr.c b/drivers/gpio/gpio-altera-a10sr.c index 9e1a138fed53..16a8951b2bed 100644 --- a/drivers/gpio/gpio-altera-a10sr.c +++ b/drivers/gpio/gpio-altera-a10sr.c @@ -96,7 +96,7 @@ static int altr_a10sr_gpio_probe(struct platform_device *pdev) gpio->regmap = a10sr->regmap; gpio->gp = altr_a10sr_gc; - + gpio->gp.parent = pdev->dev.parent; gpio->gp.of_node = pdev->dev.of_node; ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio); diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c index 5bddbd507ca9..3fe6a21e05a5 100644 --- a/drivers/gpio/gpio-altera.c +++ b/drivers/gpio/gpio-altera.c @@ -90,21 +90,18 @@ static int altera_gpio_irq_set_type(struct irq_data *d, altera_gc = gpiochip_get_data(irq_data_get_irq_chip_data(d)); - if (type == IRQ_TYPE_NONE) + if (type == IRQ_TYPE_NONE) { + irq_set_handler_locked(d, handle_bad_irq); return 0; - if (type == IRQ_TYPE_LEVEL_HIGH && - altera_gc->interrupt_trigger == IRQ_TYPE_LEVEL_HIGH) - return 0; - if (type == IRQ_TYPE_EDGE_RISING && - altera_gc->interrupt_trigger == IRQ_TYPE_EDGE_RISING) - return 0; - if (type == IRQ_TYPE_EDGE_FALLING && - altera_gc->interrupt_trigger == IRQ_TYPE_EDGE_FALLING) - return 0; - if (type == IRQ_TYPE_EDGE_BOTH && - altera_gc->interrupt_trigger == IRQ_TYPE_EDGE_BOTH) + } + if (type == altera_gc->interrupt_trigger) { + if (type == IRQ_TYPE_LEVEL_HIGH) + irq_set_handler_locked(d, handle_level_irq); + else + irq_set_handler_locked(d, handle_simple_irq); return 0; - + } + irq_set_handler_locked(d, handle_bad_irq); return -EINVAL; } @@ -230,7 +227,6 @@ static void altera_gpio_irq_edge_handler(struct irq_desc *desc) chained_irq_exit(chip, desc); } - static void altera_gpio_irq_leveL_high_handler(struct irq_desc *desc) { struct altera_gpio_chip *altera_gc; @@ -310,7 +306,7 @@ static int altera_gpio_probe(struct platform_device *pdev) altera_gc->interrupt_trigger = reg; ret = gpiochip_irqchip_add(&altera_gc->mmchip.gc, &altera_irq_chip, 0, - handle_simple_irq, IRQ_TYPE_NONE); + handle_bad_irq, IRQ_TYPE_NONE); if (ret) { dev_err(&pdev->dev, "could not add irqchip\n"); diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 9191056548fe..72f49d1e110d 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -43,25 +43,7 @@ typedef struct irq_chip *(*gpio_get_irq_chip_cb_t)(unsigned int irq); #define MAX_LABEL_SIZE 20 static void __iomem *gpio_base; - -static struct davinci_gpio_regs __iomem *gpio2regs(unsigned gpio) -{ - void __iomem *ptr; - - if (gpio < 32 * 1) - ptr = gpio_base + 0x10; - else if (gpio < 32 * 2) - ptr = gpio_base + 0x38; - else if (gpio < 32 * 3) - ptr = gpio_base + 0x60; - else if (gpio < 32 * 4) - ptr = gpio_base + 0x88; - else if (gpio < 32 * 5) - ptr = gpio_base + 0xb0; - else - ptr = NULL; - return ptr; -} +static unsigned int offset_array[5] = {0x10, 0x38, 0x60, 0x88, 0xb0}; static inline struct davinci_gpio_regs __iomem *irq2regs(struct irq_data *d) { @@ -81,11 +63,13 @@ static inline int __davinci_direction(struct gpio_chip *chip, unsigned offset, bool out, int value) { struct davinci_gpio_controller *d = gpiochip_get_data(chip); - struct davinci_gpio_regs __iomem *g = d->regs; + struct davinci_gpio_regs __iomem *g; unsigned long flags; u32 temp; - u32 mask = 1 << offset; + int bank = offset / 32; + u32 mask = __gpio_mask(offset); + g = d->regs[bank]; spin_lock_irqsave(&d->lock, flags); temp = readl_relaxed(&g->dir); if (out) { @@ -121,9 +105,12 @@ davinci_direction_out(struct gpio_chip *chip, unsigned offset, int value) static int davinci_gpio_get(struct gpio_chip *chip, unsigned offset) { struct davinci_gpio_controller *d = gpiochip_get_data(chip); - struct davinci_gpio_regs __iomem *g = d->regs; + struct davinci_gpio_regs __iomem *g; + int bank = offset / 32; - return !!((1 << offset) & readl_relaxed(&g->in_data)); + g = d->regs[bank]; + + return !!(__gpio_mask(offset) & readl_relaxed(&g->in_data)); } /* @@ -133,9 +120,13 @@ static void davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct davinci_gpio_controller *d = gpiochip_get_data(chip); - struct davinci_gpio_regs __iomem *g = d->regs; + struct davinci_gpio_regs __iomem *g; + int bank = offset / 32; - writel_relaxed((1 << offset), value ? &g->set_data : &g->clr_data); + g = d->regs[bank]; + + writel_relaxed(__gpio_mask(offset), + value ? &g->set_data : &g->clr_data); } static struct davinci_gpio_platform_data * @@ -172,34 +163,13 @@ of_err: return NULL; } -#ifdef CONFIG_OF_GPIO -static int davinci_gpio_of_xlate(struct gpio_chip *gc, - const struct of_phandle_args *gpiospec, - u32 *flags) -{ - struct davinci_gpio_controller *chips = dev_get_drvdata(gc->parent); - struct davinci_gpio_platform_data *pdata = dev_get_platdata(gc->parent); - - if (gpiospec->args[0] > pdata->ngpio) - return -EINVAL; - - if (gc != &chips[gpiospec->args[0] / 32].chip) - return -EINVAL; - - if (flags) - *flags = gpiospec->args[1]; - - return gpiospec->args[0] % 32; -} -#endif - static int davinci_gpio_probe(struct platform_device *pdev) { - int i, base; + static int ctrl_num, bank_base; + int gpio, bank; unsigned ngpio, nbank; struct davinci_gpio_controller *chips; struct davinci_gpio_platform_data *pdata; - struct davinci_gpio_regs __iomem *regs; struct device *dev = &pdev->dev; struct resource *res; char label[MAX_LABEL_SIZE]; @@ -238,41 +208,31 @@ static int davinci_gpio_probe(struct platform_device *pdev) if (IS_ERR(gpio_base)) return PTR_ERR(gpio_base); - for (i = 0, base = 0; base < ngpio; i++, base += 32) { - snprintf(label, MAX_LABEL_SIZE, "davinci_gpio.%d", i); - chips[i].chip.label = devm_kstrdup(dev, label, GFP_KERNEL); - if (!chips[i].chip.label) + snprintf(label, MAX_LABEL_SIZE, "davinci_gpio.%d", ctrl_num++); + chips->chip.label = devm_kstrdup(dev, label, GFP_KERNEL); + if (!chips->chip.label) return -ENOMEM; - chips[i].chip.direction_input = davinci_direction_in; - chips[i].chip.get = davinci_gpio_get; - chips[i].chip.direction_output = davinci_direction_out; - chips[i].chip.set = davinci_gpio_set; + chips->chip.direction_input = davinci_direction_in; + chips->chip.get = davinci_gpio_get; + chips->chip.direction_output = davinci_direction_out; + chips->chip.set = davinci_gpio_set; - chips[i].chip.base = base; - chips[i].chip.ngpio = ngpio - base; - if (chips[i].chip.ngpio > 32) - chips[i].chip.ngpio = 32; + chips->chip.ngpio = ngpio; + chips->chip.base = bank_base; #ifdef CONFIG_OF_GPIO - chips[i].chip.of_gpio_n_cells = 2; - chips[i].chip.of_xlate = davinci_gpio_of_xlate; - chips[i].chip.parent = dev; - chips[i].chip.of_node = dev->of_node; + chips->chip.of_gpio_n_cells = 2; + chips->chip.parent = dev; + chips->chip.of_node = dev->of_node; #endif - spin_lock_init(&chips[i].lock); - - regs = gpio2regs(base); - if (!regs) - return -ENXIO; - chips[i].regs = regs; - chips[i].set_data = ®s->set_data; - chips[i].clr_data = ®s->clr_data; - chips[i].in_data = ®s->in_data; + spin_lock_init(&chips->lock); + bank_base += ngpio; - gpiochip_add_data(&chips[i].chip, &chips[i]); - } + for (gpio = 0, bank = 0; gpio < ngpio; gpio += 32, bank++) + chips->regs[bank] = gpio_base + offset_array[bank]; + gpiochip_add_data(&chips->chip, chips); platform_set_drvdata(pdev, chips); davinci_gpio_irq_setup(pdev); return 0; @@ -333,16 +293,19 @@ static struct irq_chip gpio_irqchip = { static void gpio_irq_handler(struct irq_desc *desc) { - unsigned int irq = irq_desc_get_irq(desc); struct davinci_gpio_regs __iomem *g; u32 mask = 0xffff; + int bank_num; struct davinci_gpio_controller *d; + struct davinci_gpio_irq_data *irqdata; - d = (struct davinci_gpio_controller *)irq_desc_get_handler_data(desc); - g = (struct davinci_gpio_regs __iomem *)d->regs; + irqdata = (struct davinci_gpio_irq_data *)irq_desc_get_handler_data(desc); + bank_num = irqdata->bank_num; + g = irqdata->regs; + d = irqdata->chip; /* we only care about one bank */ - if (irq & 1) + if ((bank_num % 2) == 1) mask <<= 16; /* temporarily mask (level sensitive) parent IRQ */ @@ -350,6 +313,7 @@ static void gpio_irq_handler(struct irq_desc *desc) while (1) { u32 status; int bit; + irq_hw_number_t hw_irq; /* ack any irqs */ status = readl_relaxed(&g->intstat) & mask; @@ -362,9 +326,13 @@ static void gpio_irq_handler(struct irq_desc *desc) while (status) { bit = __ffs(status); status &= ~BIT(bit); + /* Max number of gpios per controller is 144 so + * hw_irq will be in [0..143] + */ + hw_irq = (bank_num / 2) * 32 + bit; + generic_handle_irq( - irq_find_mapping(d->irq_domain, - d->chip.base + bit)); + irq_find_mapping(d->irq_domain, hw_irq)); } } chained_irq_exit(irq_desc_get_chip(desc), desc); @@ -376,7 +344,7 @@ static int gpio_to_irq_banked(struct gpio_chip *chip, unsigned offset) struct davinci_gpio_controller *d = gpiochip_get_data(chip); if (d->irq_domain) - return irq_create_mapping(d->irq_domain, d->chip.base + offset); + return irq_create_mapping(d->irq_domain, offset); else return -ENXIO; } @@ -390,7 +358,7 @@ static int gpio_to_irq_unbanked(struct gpio_chip *chip, unsigned offset) * can provide direct-mapped IRQs to AINTC (up to 32 GPIOs). */ if (offset < d->gpio_unbanked) - return d->gpio_irq + offset; + return d->base_irq + offset; else return -ENODEV; } @@ -403,7 +371,7 @@ static int gpio_irq_type_unbanked(struct irq_data *data, unsigned trigger) d = (struct davinci_gpio_controller *)irq_data_get_irq_handler_data(data); g = (struct davinci_gpio_regs __iomem *)d->regs; - mask = __gpio_mask(data->irq - d->gpio_irq); + mask = __gpio_mask(data->irq - d->base_irq); if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) return -EINVAL; @@ -420,7 +388,9 @@ static int davinci_gpio_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { - struct davinci_gpio_regs __iomem *g = gpio2regs(hw); + struct davinci_gpio_controller *chips = + (struct davinci_gpio_controller *)d->host_data; + struct davinci_gpio_regs __iomem *g = chips->regs[hw / 32]; irq_set_chip_and_handler_name(irq, &gpio_irqchip, handle_simple_irq, "davinci_gpio"); @@ -478,6 +448,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) struct irq_domain *irq_domain = NULL; const struct of_device_id *match; struct irq_chip *irq_chip; + struct davinci_gpio_irq_data *irqdata; gpio_get_irq_chip_cb_t gpio_get_irq_chip; /* @@ -533,10 +504,8 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) * IRQs, while the others use banked IRQs, would need some setup * tweaks to recognize hardware which can do that. */ - for (gpio = 0, bank = 0; gpio < ngpio; bank++, gpio += 32) { - chips[bank].chip.to_irq = gpio_to_irq_banked; - chips[bank].irq_domain = irq_domain; - } + chips->chip.to_irq = gpio_to_irq_banked; + chips->irq_domain = irq_domain; /* * AINTC can handle direct/unbanked IRQs for GPIOs, with the GPIO @@ -545,9 +514,9 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) */ if (pdata->gpio_unbanked) { /* pass "bank 0" GPIO IRQs to AINTC */ - chips[0].chip.to_irq = gpio_to_irq_unbanked; - chips[0].gpio_irq = bank_irq; - chips[0].gpio_unbanked = pdata->gpio_unbanked; + chips->chip.to_irq = gpio_to_irq_unbanked; + chips->base_irq = bank_irq; + chips->gpio_unbanked = pdata->gpio_unbanked; binten = GENMASK(pdata->gpio_unbanked / 16, 0); /* AINTC handles mask/unmask; GPIO handles triggering */ @@ -557,14 +526,14 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) irq_chip->irq_set_type = gpio_irq_type_unbanked; /* default trigger: both edges */ - g = gpio2regs(0); + g = chips->regs[0]; writel_relaxed(~0, &g->set_falling); writel_relaxed(~0, &g->set_rising); /* set the direct IRQs up to use that irqchip */ for (gpio = 0; gpio < pdata->gpio_unbanked; gpio++, irq++) { irq_set_chip(irq, irq_chip); - irq_set_handler_data(irq, &chips[gpio / 32]); + irq_set_handler_data(irq, chips); irq_set_status_flags(irq, IRQ_TYPE_EDGE_BOTH); } @@ -576,8 +545,11 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) * then chain through our own handler. */ for (gpio = 0, bank = 0; gpio < ngpio; bank++, bank_irq++, gpio += 16) { - /* disabled by default, enabled only as needed */ - g = gpio2regs(gpio); + /* disabled by default, enabled only as needed + * There are register sets for 32 GPIOs. 2 banks of 16 + * GPIOs are covered by each set of registers hence divide by 2 + */ + g = chips->regs[bank / 2]; writel_relaxed(~0, &g->clr_falling); writel_relaxed(~0, &g->clr_rising); @@ -586,8 +558,19 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) * gpio irqs. Pass the irq bank's corresponding controller to * the chained irq handler. */ + irqdata = devm_kzalloc(&pdev->dev, + sizeof(struct + davinci_gpio_irq_data), + GFP_KERNEL); + if (!irqdata) + return -ENOMEM; + + irqdata->regs = g; + irqdata->bank_num = bank; + irqdata->chip = chips; + irq_set_chained_handler_and_data(bank_irq, gpio_irq_handler, - &chips[gpio / 32]); + irqdata); binten |= BIT(bank); } diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c new file mode 100644 index 000000000000..05c8946d6446 --- /dev/null +++ b/drivers/gpio/gpio-exar.c @@ -0,0 +1,200 @@ +/* + * GPIO driver for Exar XR17V35X chip + * + * Copyright (C) 2015 Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/bitops.h> +#include <linux/device.h> +#include <linux/gpio/driver.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/platform_device.h> + +#define EXAR_OFFSET_MPIOLVL_LO 0x90 +#define EXAR_OFFSET_MPIOSEL_LO 0x93 +#define EXAR_OFFSET_MPIOLVL_HI 0x96 +#define EXAR_OFFSET_MPIOSEL_HI 0x99 + +#define DRIVER_NAME "gpio_exar" + +static DEFINE_IDA(ida_index); + +struct exar_gpio_chip { + struct gpio_chip gpio_chip; + struct mutex lock; + int index; + void __iomem *regs; + char name[20]; +}; + +static void exar_update(struct gpio_chip *chip, unsigned int reg, int val, + unsigned int offset) +{ + struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip); + int temp; + + mutex_lock(&exar_gpio->lock); + temp = readb(exar_gpio->regs + reg); + temp &= ~BIT(offset); + if (val) + temp |= BIT(offset); + writeb(temp, exar_gpio->regs + reg); + mutex_unlock(&exar_gpio->lock); +} + +static int exar_set_direction(struct gpio_chip *chip, int direction, + unsigned int offset) +{ + unsigned int bank = offset / 8; + unsigned int addr; + + addr = bank ? EXAR_OFFSET_MPIOSEL_HI : EXAR_OFFSET_MPIOSEL_LO; + exar_update(chip, addr, direction, offset % 8); + return 0; +} + +static int exar_direction_output(struct gpio_chip *chip, unsigned int offset, + int value) +{ + return exar_set_direction(chip, 0, offset); +} + +static int exar_direction_input(struct gpio_chip *chip, unsigned int offset) +{ + return exar_set_direction(chip, 1, offset); +} + +static int exar_get(struct gpio_chip *chip, unsigned int reg) +{ + struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip); + int value; + + mutex_lock(&exar_gpio->lock); + value = readb(exar_gpio->regs + reg); + mutex_unlock(&exar_gpio->lock); + + return !!value; +} + +static int exar_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + unsigned int bank = offset / 8; + unsigned int addr; + int val; + + addr = bank ? EXAR_OFFSET_MPIOSEL_HI : EXAR_OFFSET_MPIOSEL_LO; + val = exar_get(chip, addr) >> (offset % 8); + + return !!val; +} + +static int exar_get_value(struct gpio_chip *chip, unsigned int offset) +{ + unsigned int bank = offset / 8; + unsigned int addr; + int val; + + addr = bank ? EXAR_OFFSET_MPIOLVL_LO : EXAR_OFFSET_MPIOLVL_HI; + val = exar_get(chip, addr) >> (offset % 8); + + return !!val; +} + +static void exar_set_value(struct gpio_chip *chip, unsigned int offset, + int value) +{ + unsigned int bank = offset / 8; + unsigned int addr; + + addr = bank ? EXAR_OFFSET_MPIOLVL_HI : EXAR_OFFSET_MPIOLVL_LO; + exar_update(chip, addr, value, offset % 8); +} + +static int gpio_exar_probe(struct platform_device *pdev) +{ + struct pci_dev *pcidev = platform_get_drvdata(pdev); + struct exar_gpio_chip *exar_gpio; + void __iomem *p; + int index, ret; + + if (pcidev->vendor != PCI_VENDOR_ID_EXAR) + return -ENODEV; + + /* + * Map the pci device to get the register addresses. + * We will need to read and write those registers to control + * the GPIO pins. + * Using managed functions will save us from unmaping on exit. + * As the device is enabled using managed functions by the + * UART driver we can also use managed functions here. + */ + p = pcim_iomap(pcidev, 0, 0); + if (!p) + return -ENOMEM; + + exar_gpio = devm_kzalloc(&pcidev->dev, sizeof(*exar_gpio), GFP_KERNEL); + if (!exar_gpio) + return -ENOMEM; + + mutex_init(&exar_gpio->lock); + + index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL); + + sprintf(exar_gpio->name, "exar_gpio%d", index); + exar_gpio->gpio_chip.label = exar_gpio->name; + exar_gpio->gpio_chip.parent = &pcidev->dev; + exar_gpio->gpio_chip.direction_output = exar_direction_output; + exar_gpio->gpio_chip.direction_input = exar_direction_input; + exar_gpio->gpio_chip.get_direction = exar_get_direction; + exar_gpio->gpio_chip.get = exar_get_value; + exar_gpio->gpio_chip.set = exar_set_value; + exar_gpio->gpio_chip.base = -1; + exar_gpio->gpio_chip.ngpio = 16; + exar_gpio->regs = p; + exar_gpio->index = index; + + ret = devm_gpiochip_add_data(&pcidev->dev, + &exar_gpio->gpio_chip, exar_gpio); + if (ret) + goto err_destroy; + + platform_set_drvdata(pdev, exar_gpio); + + return 0; + +err_destroy: + ida_simple_remove(&ida_index, index); + mutex_destroy(&exar_gpio->lock); + return ret; +} + +static int gpio_exar_remove(struct platform_device *pdev) +{ + struct exar_gpio_chip *exar_gpio = platform_get_drvdata(pdev); + + ida_simple_remove(&ida_index, exar_gpio->index); + mutex_destroy(&exar_gpio->lock); + + return 0; +} + +static struct platform_driver gpio_exar_driver = { + .probe = gpio_exar_probe, + .remove = gpio_exar_remove, + .driver = { + .name = DRIVER_NAME, + }, +}; + +module_platform_driver(gpio_exar_driver); + +MODULE_ALIAS("platform:" DRIVER_NAME); +MODULE_DESCRIPTION("Exar GPIO driver"); +MODULE_AUTHOR("Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpio/gpio-gemini.c b/drivers/gpio/gpio-gemini.c new file mode 100644 index 000000000000..962485163b7f --- /dev/null +++ b/drivers/gpio/gpio-gemini.c @@ -0,0 +1,236 @@ +/* + * Gemini gpiochip and interrupt routines + * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org> + * + * Based on arch/arm/mach-gemini/gpio.c: + * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> + * + * Based on plat-mxc/gpio.c: + * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de> + * Copyright 2008 Juergen Beisert, kernel@pengutronix.de + */ +#include <linux/gpio/driver.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/of_gpio.h> +#include <linux/bitops.h> + +/* GPIO registers definition */ +#define GPIO_DATA_OUT 0x00 +#define GPIO_DATA_IN 0x04 +#define GPIO_DIR 0x08 +#define GPIO_DATA_SET 0x10 +#define GPIO_DATA_CLR 0x14 +#define GPIO_PULL_EN 0x18 +#define GPIO_PULL_TYPE 0x1C +#define GPIO_INT_EN 0x20 +#define GPIO_INT_STAT 0x24 +#define GPIO_INT_MASK 0x2C +#define GPIO_INT_CLR 0x30 +#define GPIO_INT_TYPE 0x34 +#define GPIO_INT_BOTH_EDGE 0x38 +#define GPIO_INT_LEVEL 0x3C +#define GPIO_DEBOUNCE_EN 0x40 +#define GPIO_DEBOUNCE_PRESCALE 0x44 + +/** + * struct gemini_gpio - Gemini GPIO state container + * @dev: containing device for this instance + * @gc: gpiochip for this instance + */ +struct gemini_gpio { + struct device *dev; + struct gpio_chip gc; + void __iomem *base; +}; + +static void gemini_gpio_ack_irq(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct gemini_gpio *g = gpiochip_get_data(gc); + + writel(BIT(irqd_to_hwirq(d)), g->base + GPIO_INT_CLR); +} + +static void gemini_gpio_mask_irq(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct gemini_gpio *g = gpiochip_get_data(gc); + u32 val; + + val = readl(g->base + GPIO_INT_EN); + val &= ~BIT(irqd_to_hwirq(d)); + writel(val, g->base + GPIO_INT_EN); +} + +static void gemini_gpio_unmask_irq(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct gemini_gpio *g = gpiochip_get_data(gc); + u32 val; + + val = readl(g->base + GPIO_INT_EN); + val |= BIT(irqd_to_hwirq(d)); + writel(val, g->base + GPIO_INT_EN); +} + +static int gemini_gpio_set_irq_type(struct irq_data *d, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct gemini_gpio *g = gpiochip_get_data(gc); + u32 mask = BIT(irqd_to_hwirq(d)); + u32 reg_both, reg_level, reg_type; + + reg_type = readl(g->base + GPIO_INT_TYPE); + reg_level = readl(g->base + GPIO_INT_LEVEL); + reg_both = readl(g->base + GPIO_INT_BOTH_EDGE); + + switch (type) { + case IRQ_TYPE_EDGE_BOTH: + irq_set_handler_locked(d, handle_edge_irq); + reg_type &= ~mask; + reg_both |= mask; + break; + case IRQ_TYPE_EDGE_RISING: + irq_set_handler_locked(d, handle_edge_irq); + reg_type &= ~mask; + reg_both &= ~mask; + reg_level &= ~mask; + break; + case IRQ_TYPE_EDGE_FALLING: + irq_set_handler_locked(d, handle_edge_irq); + reg_type &= ~mask; + reg_both &= ~mask; + reg_level |= mask; + break; + case IRQ_TYPE_LEVEL_HIGH: + irq_set_handler_locked(d, handle_level_irq); + reg_type |= mask; + reg_level &= ~mask; + break; + case IRQ_TYPE_LEVEL_LOW: + irq_set_handler_locked(d, handle_level_irq); + reg_type |= mask; + reg_level |= mask; + break; + default: + irq_set_handler_locked(d, handle_bad_irq); + return -EINVAL; + } + + writel(reg_type, g->base + GPIO_INT_TYPE); + writel(reg_level, g->base + GPIO_INT_LEVEL); + writel(reg_both, g->base + GPIO_INT_BOTH_EDGE); + + gemini_gpio_ack_irq(d); + + return 0; +} + +static struct irq_chip gemini_gpio_irqchip = { + .name = "GPIO", + .irq_ack = gemini_gpio_ack_irq, + .irq_mask = gemini_gpio_mask_irq, + .irq_unmask = gemini_gpio_unmask_irq, + .irq_set_type = gemini_gpio_set_irq_type, +}; + +static void gemini_gpio_irq_handler(struct irq_desc *desc) +{ + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + struct gemini_gpio *g = gpiochip_get_data(gc); + struct irq_chip *irqchip = irq_desc_get_chip(desc); + int offset; + unsigned long stat; + + chained_irq_enter(irqchip, desc); + + stat = readl(g->base + GPIO_INT_STAT); + if (stat) + for_each_set_bit(offset, &stat, gc->ngpio) + generic_handle_irq(irq_find_mapping(gc->irqdomain, + offset)); + + chained_irq_exit(irqchip, desc); +} + +static int gemini_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct gemini_gpio *g; + int irq; + int ret; + + g = devm_kzalloc(dev, sizeof(*g), GFP_KERNEL); + if (!g) + return -ENOMEM; + + g->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + g->base = devm_ioremap_resource(dev, res); + if (IS_ERR(g->base)) + return PTR_ERR(g->base); + + irq = platform_get_irq(pdev, 0); + if (!irq) + return -EINVAL; + + ret = bgpio_init(&g->gc, dev, 4, + g->base + GPIO_DATA_IN, + g->base + GPIO_DATA_SET, + g->base + GPIO_DATA_CLR, + g->base + GPIO_DIR, + NULL, + 0); + if (ret) { + dev_err(dev, "unable to init generic GPIO\n"); + return ret; + } + g->gc.label = "Gemini"; + g->gc.base = -1; + g->gc.parent = dev; + g->gc.owner = THIS_MODULE; + /* ngpio is set by bgpio_init() */ + + ret = devm_gpiochip_add_data(dev, &g->gc, g); + if (ret) + return ret; + + /* Disable, unmask and clear all interrupts */ + writel(0x0, g->base + GPIO_INT_EN); + writel(0x0, g->base + GPIO_INT_MASK); + writel(~0x0, g->base + GPIO_INT_CLR); + + ret = gpiochip_irqchip_add(&g->gc, &gemini_gpio_irqchip, + 0, handle_bad_irq, + IRQ_TYPE_NONE); + if (ret) { + dev_info(dev, "could not add irqchip\n"); + return ret; + } + gpiochip_set_chained_irqchip(&g->gc, &gemini_gpio_irqchip, + irq, gemini_gpio_irq_handler); + + dev_info(dev, "Gemini GPIO @%p registered\n", g->base); + + return 0; +} + +static const struct of_device_id gemini_gpio_of_match[] = { + { + .compatible = "cortina,gemini-gpio", + }, + {}, +}; + +static struct platform_driver gemini_gpio_driver = { + .driver = { + .name = "gemini-gpio", + .of_match_table = of_match_ptr(gemini_gpio_of_match), + }, + .probe = gemini_gpio_probe, +}; +builtin_platform_driver(gemini_gpio_driver); diff --git a/drivers/gpio/gpio-gpio-mm.c b/drivers/gpio/gpio-gpio-mm.c index 1e7def9449ce..fa4baa2543db 100644 --- a/drivers/gpio/gpio-gpio-mm.c +++ b/drivers/gpio/gpio-gpio-mm.c @@ -192,6 +192,56 @@ static void gpiomm_gpio_set(struct gpio_chip *chip, unsigned int offset, spin_unlock_irqrestore(&gpiommgpio->lock, flags); } +static void gpiomm_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); + unsigned int i; + const unsigned int gpio_reg_size = 8; + unsigned int port; + unsigned int out_port; + unsigned int bitmask; + unsigned long flags; + + /* set bits are evaluated a gpio register size at a time */ + for (i = 0; i < chip->ngpio; i += gpio_reg_size) { + /* no more set bits in this mask word; skip to the next word */ + if (!mask[BIT_WORD(i)]) { + i = (BIT_WORD(i) + 1) * BITS_PER_LONG - gpio_reg_size; + continue; + } + + port = i / gpio_reg_size; + out_port = (port > 2) ? port + 1 : port; + bitmask = mask[BIT_WORD(i)] & bits[BIT_WORD(i)]; + + spin_lock_irqsave(&gpiommgpio->lock, flags); + + /* update output state data and set device gpio register */ + gpiommgpio->out_state[port] &= ~mask[BIT_WORD(i)]; + gpiommgpio->out_state[port] |= bitmask; + outb(gpiommgpio->out_state[port], gpiommgpio->base + out_port); + + spin_unlock_irqrestore(&gpiommgpio->lock, flags); + + /* prepare for next gpio register set */ + mask[BIT_WORD(i)] >>= gpio_reg_size; + bits[BIT_WORD(i)] >>= gpio_reg_size; + } +} + +#define GPIOMM_NGPIO 48 +static const char *gpiomm_names[GPIOMM_NGPIO] = { + "Port 1A0", "Port 1A1", "Port 1A2", "Port 1A3", "Port 1A4", "Port 1A5", + "Port 1A6", "Port 1A7", "Port 1B0", "Port 1B1", "Port 1B2", "Port 1B3", + "Port 1B4", "Port 1B5", "Port 1B6", "Port 1B7", "Port 1C0", "Port 1C1", + "Port 1C2", "Port 1C3", "Port 1C4", "Port 1C5", "Port 1C6", "Port 1C7", + "Port 2A0", "Port 2A1", "Port 2A2", "Port 2A3", "Port 2A4", "Port 2A5", + "Port 2A6", "Port 2A7", "Port 2B0", "Port 2B1", "Port 2B2", "Port 2B3", + "Port 2B4", "Port 2B5", "Port 2B6", "Port 2B7", "Port 2C0", "Port 2C1", + "Port 2C2", "Port 2C3", "Port 2C4", "Port 2C5", "Port 2C6", "Port 2C7", +}; + static int gpiomm_probe(struct device *dev, unsigned int id) { struct gpiomm_gpio *gpiommgpio; @@ -212,19 +262,19 @@ static int gpiomm_probe(struct device *dev, unsigned int id) gpiommgpio->chip.parent = dev; gpiommgpio->chip.owner = THIS_MODULE; gpiommgpio->chip.base = -1; - gpiommgpio->chip.ngpio = 48; + gpiommgpio->chip.ngpio = GPIOMM_NGPIO; + gpiommgpio->chip.names = gpiomm_names; gpiommgpio->chip.get_direction = gpiomm_gpio_get_direction; gpiommgpio->chip.direction_input = gpiomm_gpio_direction_input; gpiommgpio->chip.direction_output = gpiomm_gpio_direction_output; gpiommgpio->chip.get = gpiomm_gpio_get; gpiommgpio->chip.set = gpiomm_gpio_set; + gpiommgpio->chip.set_multiple = gpiomm_gpio_set_multiple; gpiommgpio->base = base[id]; spin_lock_init(&gpiommgpio->lock); - dev_set_drvdata(dev, gpiommgpio); - - err = gpiochip_add_data(&gpiommgpio->chip, gpiommgpio); + err = devm_gpiochip_add_data(dev, &gpiommgpio->chip, gpiommgpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); return err; @@ -243,21 +293,11 @@ static int gpiomm_probe(struct device *dev, unsigned int id) return 0; } -static int gpiomm_remove(struct device *dev, unsigned int id) -{ - struct gpiomm_gpio *const gpiommgpio = dev_get_drvdata(dev); - - gpiochip_remove(&gpiommgpio->chip); - - return 0; -} - static struct isa_driver gpiomm_driver = { .probe = gpiomm_probe, .driver = { .name = "gpio-mm" }, - .remove = gpiomm_remove }; module_isa_driver(gpiomm_driver, num_gpiomm); diff --git a/drivers/gpio/gpio-intel-mid.c b/drivers/gpio/gpio-intel-mid.c index a1e44c221f66..b76ecee82c3f 100644 --- a/drivers/gpio/gpio-intel-mid.c +++ b/drivers/gpio/gpio-intel-mid.c @@ -321,7 +321,7 @@ static void intel_mid_irq_init_hw(struct intel_mid_gpio *priv) } } -static int intel_gpio_runtime_idle(struct device *dev) +static int __maybe_unused intel_gpio_runtime_idle(struct device *dev) { int err = pm_schedule_suspend(dev, 500); return err ?: -EBUSY; diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c index 504550665091..2a57d024481d 100644 --- a/drivers/gpio/gpio-mcp23s08.c +++ b/drivers/gpio/gpio-mcp23s08.c @@ -23,6 +23,7 @@ #include <linux/interrupt.h> #include <linux/of_irq.h> #include <linux/of_device.h> +#include <linux/regmap.h> /** * MCP types supported by driver @@ -58,16 +59,10 @@ struct mcp23s08; -struct mcp23s08_ops { - int (*read)(struct mcp23s08 *mcp, unsigned reg); - int (*write)(struct mcp23s08 *mcp, unsigned reg, unsigned val); - int (*read_regs)(struct mcp23s08 *mcp, unsigned reg, - u16 *vals, unsigned n); -}; - struct mcp23s08 { u8 addr; bool irq_active_high; + bool reg_shift; u16 cache[11]; u16 irq_rise; @@ -80,188 +75,126 @@ struct mcp23s08 { struct gpio_chip chip; - const struct mcp23s08_ops *ops; - void *data; /* ops specific data */ -}; - -/* A given spi_device can represent up to eight mcp23sxx chips - * sharing the same chipselect but using different addresses - * (e.g. chips #0 and #3 might be populated, but not #1 or $2). - * Driver data holds all the per-chip data. - */ -struct mcp23s08_driver_data { - unsigned ngpio; - struct mcp23s08 *mcp[8]; - struct mcp23s08 chip[]; + struct regmap *regmap; + struct device *dev; }; -/*----------------------------------------------------------------------*/ +static const struct regmap_config mcp23x08_regmap = { + .reg_bits = 8, + .val_bits = 8, -#if IS_ENABLED(CONFIG_I2C) - -static int mcp23008_read(struct mcp23s08 *mcp, unsigned reg) -{ - return i2c_smbus_read_byte_data(mcp->data, reg); -} - -static int mcp23008_write(struct mcp23s08 *mcp, unsigned reg, unsigned val) -{ - return i2c_smbus_write_byte_data(mcp->data, reg, val); -} - -static int -mcp23008_read_regs(struct mcp23s08 *mcp, unsigned reg, u16 *vals, unsigned n) -{ - while (n--) { - int ret = mcp23008_read(mcp, reg++); - if (ret < 0) - return ret; - *vals++ = ret; - } - - return 0; -} - -static int mcp23017_read(struct mcp23s08 *mcp, unsigned reg) -{ - return i2c_smbus_read_word_data(mcp->data, reg << 1); -} - -static int mcp23017_write(struct mcp23s08 *mcp, unsigned reg, unsigned val) -{ - return i2c_smbus_write_word_data(mcp->data, reg << 1, val); -} - -static int -mcp23017_read_regs(struct mcp23s08 *mcp, unsigned reg, u16 *vals, unsigned n) -{ - while (n--) { - int ret = mcp23017_read(mcp, reg++); - if (ret < 0) - return ret; - *vals++ = ret; - } - - return 0; -} - -static const struct mcp23s08_ops mcp23008_ops = { - .read = mcp23008_read, - .write = mcp23008_write, - .read_regs = mcp23008_read_regs, + .reg_stride = 1, + .max_register = MCP_OLAT, }; -static const struct mcp23s08_ops mcp23017_ops = { - .read = mcp23017_read, - .write = mcp23017_write, - .read_regs = mcp23017_read_regs, -}; +static const struct regmap_config mcp23x17_regmap = { + .reg_bits = 8, + .val_bits = 16, -#endif /* CONFIG_I2C */ + .reg_stride = 2, + .max_register = MCP_OLAT << 1, + .val_format_endian = REGMAP_ENDIAN_LITTLE, +}; /*----------------------------------------------------------------------*/ #ifdef CONFIG_SPI_MASTER -static int mcp23s08_read(struct mcp23s08 *mcp, unsigned reg) +static int mcp23sxx_spi_write(void *context, const void *data, size_t count) { - u8 tx[2], rx[1]; - int status; + struct mcp23s08 *mcp = context; + struct spi_device *spi = to_spi_device(mcp->dev); + struct spi_message m; + struct spi_transfer t[2] = { { .tx_buf = &mcp->addr, .len = 1, }, + { .tx_buf = data, .len = count, }, }; - tx[0] = mcp->addr | 0x01; - tx[1] = reg; - status = spi_write_then_read(mcp->data, tx, sizeof(tx), rx, sizeof(rx)); - return (status < 0) ? status : rx[0]; + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + return spi_sync(spi, &m); } -static int mcp23s08_write(struct mcp23s08 *mcp, unsigned reg, unsigned val) +static int mcp23sxx_spi_gather_write(void *context, + const void *reg, size_t reg_size, + const void *val, size_t val_size) { - u8 tx[3]; - - tx[0] = mcp->addr; - tx[1] = reg; - tx[2] = val; - return spi_write_then_read(mcp->data, tx, sizeof(tx), NULL, 0); + struct mcp23s08 *mcp = context; + struct spi_device *spi = to_spi_device(mcp->dev); + struct spi_message m; + struct spi_transfer t[3] = { { .tx_buf = &mcp->addr, .len = 1, }, + { .tx_buf = reg, .len = reg_size, }, + { .tx_buf = val, .len = val_size, }, }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + spi_message_add_tail(&t[2], &m); + + return spi_sync(spi, &m); } -static int -mcp23s08_read_regs(struct mcp23s08 *mcp, unsigned reg, u16 *vals, unsigned n) +static int mcp23sxx_spi_read(void *context, const void *reg, size_t reg_size, + void *val, size_t val_size) { - u8 tx[2], *tmp; - int status; + struct mcp23s08 *mcp = context; + struct spi_device *spi = to_spi_device(mcp->dev); + u8 tx[2]; - if ((n + reg) > sizeof(mcp->cache)) + if (reg_size != 1) return -EINVAL; + tx[0] = mcp->addr | 0x01; - tx[1] = reg; + tx[1] = *((u8 *) reg); - tmp = (u8 *)vals; - status = spi_write_then_read(mcp->data, tx, sizeof(tx), tmp, n); - if (status >= 0) { - while (n--) - vals[n] = tmp[n]; /* expand to 16bit */ - } - return status; + return spi_write_then_read(spi, tx, sizeof(tx), val, val_size); } -static int mcp23s17_read(struct mcp23s08 *mcp, unsigned reg) -{ - u8 tx[2], rx[2]; - int status; +static const struct regmap_bus mcp23sxx_spi_regmap = { + .write = mcp23sxx_spi_write, + .gather_write = mcp23sxx_spi_gather_write, + .read = mcp23sxx_spi_read, +}; - tx[0] = mcp->addr | 0x01; - tx[1] = reg << 1; - status = spi_write_then_read(mcp->data, tx, sizeof(tx), rx, sizeof(rx)); - return (status < 0) ? status : (rx[0] | (rx[1] << 8)); -} +#endif /* CONFIG_SPI_MASTER */ -static int mcp23s17_write(struct mcp23s08 *mcp, unsigned reg, unsigned val) +static int mcp_read(struct mcp23s08 *mcp, unsigned int reg, unsigned int *val) { - u8 tx[4]; - - tx[0] = mcp->addr; - tx[1] = reg << 1; - tx[2] = val; - tx[3] = val >> 8; - return spi_write_then_read(mcp->data, tx, sizeof(tx), NULL, 0); + return regmap_read(mcp->regmap, reg << mcp->reg_shift, val); } -static int -mcp23s17_read_regs(struct mcp23s08 *mcp, unsigned reg, u16 *vals, unsigned n) +static int mcp_write(struct mcp23s08 *mcp, unsigned int reg, unsigned int val) { - u8 tx[2]; - int status; + return regmap_write(mcp->regmap, reg << mcp->reg_shift, val); +} - if ((n + reg) > sizeof(mcp->cache)) - return -EINVAL; - tx[0] = mcp->addr | 0x01; - tx[1] = reg << 1; +static int mcp_update_cache(struct mcp23s08 *mcp) +{ + int ret, reg, i; - status = spi_write_then_read(mcp->data, tx, sizeof(tx), - (u8 *)vals, n * 2); - if (status >= 0) { - while (n--) - vals[n] = __le16_to_cpu((__le16)vals[n]); + for (i = 0; i < ARRAY_SIZE(mcp->cache); i++) { + ret = mcp_read(mcp, i, ®); + if (ret < 0) + return ret; + mcp->cache[i] = reg; } - return status; + return 0; } -static const struct mcp23s08_ops mcp23s08_ops = { - .read = mcp23s08_read, - .write = mcp23s08_write, - .read_regs = mcp23s08_read_regs, -}; +/*----------------------------------------------------------------------*/ -static const struct mcp23s08_ops mcp23s17_ops = { - .read = mcp23s17_read, - .write = mcp23s17_write, - .read_regs = mcp23s17_read_regs, +/* A given spi_device can represent up to eight mcp23sxx chips + * sharing the same chipselect but using different addresses + * (e.g. chips #0 and #3 might be populated, but not #1 or $2). + * Driver data holds all the per-chip data. + */ +struct mcp23s08_driver_data { + unsigned ngpio; + struct mcp23s08 *mcp[8]; + struct mcp23s08 chip[]; }; -#endif /* CONFIG_SPI_MASTER */ - -/*----------------------------------------------------------------------*/ static int mcp23s08_direction_input(struct gpio_chip *chip, unsigned offset) { @@ -270,7 +203,7 @@ static int mcp23s08_direction_input(struct gpio_chip *chip, unsigned offset) mutex_lock(&mcp->lock); mcp->cache[MCP_IODIR] |= (1 << offset); - status = mcp->ops->write(mcp, MCP_IODIR, mcp->cache[MCP_IODIR]); + status = mcp_write(mcp, MCP_IODIR, mcp->cache[MCP_IODIR]); mutex_unlock(&mcp->lock); return status; } @@ -278,13 +211,13 @@ static int mcp23s08_direction_input(struct gpio_chip *chip, unsigned offset) static int mcp23s08_get(struct gpio_chip *chip, unsigned offset) { struct mcp23s08 *mcp = gpiochip_get_data(chip); - int status; + int status, ret; mutex_lock(&mcp->lock); /* REVISIT reading this clears any IRQ ... */ - status = mcp->ops->read(mcp, MCP_GPIO); - if (status < 0) + ret = mcp_read(mcp, MCP_GPIO, &status); + if (ret < 0) status = 0; else { mcp->cache[MCP_GPIO] = status; @@ -303,7 +236,7 @@ static int __mcp23s08_set(struct mcp23s08 *mcp, unsigned mask, int value) else olat &= ~mask; mcp->cache[MCP_OLAT] = olat; - return mcp->ops->write(mcp, MCP_OLAT, olat); + return mcp_write(mcp, MCP_OLAT, olat); } static void mcp23s08_set(struct gpio_chip *chip, unsigned offset, int value) @@ -327,7 +260,7 @@ mcp23s08_direction_output(struct gpio_chip *chip, unsigned offset, int value) status = __mcp23s08_set(mcp, mask, value); if (status == 0) { mcp->cache[MCP_IODIR] &= ~mask; - status = mcp->ops->write(mcp, MCP_IODIR, mcp->cache[MCP_IODIR]); + status = mcp_write(mcp, MCP_IODIR, mcp->cache[MCP_IODIR]); } mutex_unlock(&mcp->lock); return status; @@ -337,33 +270,86 @@ mcp23s08_direction_output(struct gpio_chip *chip, unsigned offset, int value) static irqreturn_t mcp23s08_irq(int irq, void *data) { struct mcp23s08 *mcp = data; - int intcap, intf, i; + int intcap, intf, i, gpio, gpio_orig, intcap_mask; unsigned int child_irq; + bool intf_set, intcap_changed, gpio_bit_changed, + defval_changed, gpio_set; mutex_lock(&mcp->lock); - intf = mcp->ops->read(mcp, MCP_INTF); - if (intf < 0) { + if (mcp_read(mcp, MCP_INTF, &intf) < 0) { mutex_unlock(&mcp->lock); return IRQ_HANDLED; } mcp->cache[MCP_INTF] = intf; - intcap = mcp->ops->read(mcp, MCP_INTCAP); - if (intcap < 0) { + if (mcp_read(mcp, MCP_INTCAP, &intcap) < 0) { mutex_unlock(&mcp->lock); return IRQ_HANDLED; } mcp->cache[MCP_INTCAP] = intcap; + + /* This clears the interrupt(configurable on S18) */ + if (mcp_read(mcp, MCP_GPIO, &gpio) < 0) { + mutex_unlock(&mcp->lock); + return IRQ_HANDLED; + } + gpio_orig = mcp->cache[MCP_GPIO]; + mcp->cache[MCP_GPIO] = gpio; mutex_unlock(&mcp->lock); + if (mcp->cache[MCP_INTF] == 0) { + /* There is no interrupt pending */ + return IRQ_HANDLED; + } + + dev_dbg(mcp->chip.parent, + "intcap 0x%04X intf 0x%04X gpio_orig 0x%04X gpio 0x%04X\n", + intcap, intf, gpio_orig, gpio); for (i = 0; i < mcp->chip.ngpio; i++) { - if ((BIT(i) & mcp->cache[MCP_INTF]) && - ((BIT(i) & intcap & mcp->irq_rise) || - (mcp->irq_fall & ~intcap & BIT(i)) || - (BIT(i) & mcp->cache[MCP_INTCON]))) { + /* We must check all of the inputs on the chip, + * otherwise we may not notice a change on >=2 pins. + * + * On at least the mcp23s17, INTCAP is only updated + * one byte at a time(INTCAPA and INTCAPB are + * not written to at the same time - only on a per-bank + * basis). + * + * INTF only contains the single bit that caused the + * interrupt per-bank. On the mcp23s17, there is + * INTFA and INTFB. If two pins are changed on the A + * side at the same time, INTF will only have one bit + * set. If one pin on the A side and one pin on the B + * side are changed at the same time, INTF will have + * two bits set. Thus, INTF can't be the only check + * to see if the input has changed. + */ + + intf_set = BIT(i) & mcp->cache[MCP_INTF]; + if (i < 8 && intf_set) + intcap_mask = 0x00FF; + else if (i >= 8 && intf_set) + intcap_mask = 0xFF00; + else + intcap_mask = 0x00; + + intcap_changed = (intcap_mask & + (BIT(i) & mcp->cache[MCP_INTCAP])) != + (intcap_mask & (BIT(i) & gpio_orig)); + gpio_set = BIT(i) & mcp->cache[MCP_GPIO]; + gpio_bit_changed = (BIT(i) & gpio_orig) != + (BIT(i) & mcp->cache[MCP_GPIO]); + defval_changed = (BIT(i) & mcp->cache[MCP_INTCON]) && + ((BIT(i) & mcp->cache[MCP_GPIO]) != + (BIT(i) & mcp->cache[MCP_DEFVAL])); + + if (((gpio_bit_changed || intcap_changed) && + (BIT(i) & mcp->irq_rise) && gpio_set) || + ((gpio_bit_changed || intcap_changed) && + (BIT(i) & mcp->irq_fall) && !gpio_set) || + defval_changed) { child_irq = irq_find_mapping(mcp->chip.irqdomain, i); handle_nested_irq(child_irq); } @@ -435,9 +421,9 @@ static void mcp23s08_irq_bus_unlock(struct irq_data *data) struct mcp23s08 *mcp = gpiochip_get_data(gc); mutex_lock(&mcp->lock); - mcp->ops->write(mcp, MCP_GPINTEN, mcp->cache[MCP_GPINTEN]); - mcp->ops->write(mcp, MCP_DEFVAL, mcp->cache[MCP_DEFVAL]); - mcp->ops->write(mcp, MCP_INTCON, mcp->cache[MCP_INTCON]); + mcp_write(mcp, MCP_GPINTEN, mcp->cache[MCP_GPINTEN]); + mcp_write(mcp, MCP_DEFVAL, mcp->cache[MCP_DEFVAL]); + mcp_write(mcp, MCP_INTCON, mcp->cache[MCP_INTCON]); mutex_unlock(&mcp->lock); mutex_unlock(&mcp->irq_lock); } @@ -514,7 +500,7 @@ static void mcp23s08_dbg_show(struct seq_file *s, struct gpio_chip *chip) bank = '0' + ((mcp->addr >> 1) & 0x7); mutex_lock(&mcp->lock); - t = mcp->ops->read_regs(mcp, 0, mcp->cache, ARRAY_SIZE(mcp->cache)); + t = mcp_update_cache(mcp); if (t < 0) { seq_printf(s, " I/O ERROR %d\n", t); goto done; @@ -549,12 +535,12 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, void *data, unsigned addr, unsigned type, struct mcp23s08_platform_data *pdata, int cs) { - int status; + int status, ret; bool mirror = false; mutex_init(&mcp->lock); - mcp->data = data; + mcp->dev = dev; mcp->addr = addr; mcp->irq_active_high = false; @@ -571,19 +557,25 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, switch (type) { #ifdef CONFIG_SPI_MASTER case MCP_TYPE_S08: - mcp->ops = &mcp23s08_ops; + mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp, + &mcp23x08_regmap); + mcp->reg_shift = 0; mcp->chip.ngpio = 8; mcp->chip.label = "mcp23s08"; break; case MCP_TYPE_S17: - mcp->ops = &mcp23s17_ops; + mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp, + &mcp23x17_regmap); + mcp->reg_shift = 1; mcp->chip.ngpio = 16; mcp->chip.label = "mcp23s17"; break; case MCP_TYPE_S18: - mcp->ops = &mcp23s17_ops; + mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp, + &mcp23x17_regmap); + mcp->reg_shift = 1; mcp->chip.ngpio = 16; mcp->chip.label = "mcp23s18"; break; @@ -591,13 +583,15 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, #if IS_ENABLED(CONFIG_I2C) case MCP_TYPE_008: - mcp->ops = &mcp23008_ops; + mcp->regmap = devm_regmap_init_i2c(data, &mcp23x08_regmap); + mcp->reg_shift = 0; mcp->chip.ngpio = 8; mcp->chip.label = "mcp23008"; break; case MCP_TYPE_017: - mcp->ops = &mcp23017_ops; + mcp->regmap = devm_regmap_init_i2c(data, &mcp23x17_regmap); + mcp->reg_shift = 1; mcp->chip.ngpio = 16; mcp->chip.label = "mcp23017"; break; @@ -608,6 +602,9 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, return -EINVAL; } + if (IS_ERR(mcp->regmap)) + return PTR_ERR(mcp->regmap); + mcp->chip.base = pdata->base; mcp->chip.can_sleep = true; mcp->chip.parent = dev; @@ -617,8 +614,8 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, * and MCP_IOCON.HAEN = 1, so we work with all chips. */ - status = mcp->ops->read(mcp, MCP_IOCON); - if (status < 0) + ret = mcp_read(mcp, MCP_IOCON, &status); + if (ret < 0) goto fail; mcp->irq_controller = pdata->irq_controller; @@ -646,51 +643,49 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, if (type == MCP_TYPE_S18) status |= IOCON_INTCC | (IOCON_INTCC << 8); - status = mcp->ops->write(mcp, MCP_IOCON, status); - if (status < 0) + ret = mcp_write(mcp, MCP_IOCON, status); + if (ret < 0) goto fail; } /* configure ~100K pullups */ - status = mcp->ops->write(mcp, MCP_GPPU, pdata->chip[cs].pullups); - if (status < 0) + ret = mcp_write(mcp, MCP_GPPU, pdata->chip[cs].pullups); + if (ret < 0) goto fail; - status = mcp->ops->read_regs(mcp, 0, mcp->cache, ARRAY_SIZE(mcp->cache)); - if (status < 0) + ret = mcp_update_cache(mcp); + if (ret < 0) goto fail; /* disable inverter on input */ if (mcp->cache[MCP_IPOL] != 0) { mcp->cache[MCP_IPOL] = 0; - status = mcp->ops->write(mcp, MCP_IPOL, 0); - if (status < 0) + ret = mcp_write(mcp, MCP_IPOL, 0); + if (ret < 0) goto fail; } /* disable irqs */ if (mcp->cache[MCP_GPINTEN] != 0) { mcp->cache[MCP_GPINTEN] = 0; - status = mcp->ops->write(mcp, MCP_GPINTEN, 0); - if (status < 0) + ret = mcp_write(mcp, MCP_GPINTEN, 0); + if (ret < 0) goto fail; } - status = gpiochip_add_data(&mcp->chip, mcp); - if (status < 0) + ret = gpiochip_add_data(&mcp->chip, mcp); + if (ret < 0) goto fail; if (mcp->irq && mcp->irq_controller) { - status = mcp23s08_irq_setup(mcp); - if (status) { + ret = mcp23s08_irq_setup(mcp); + if (ret) goto fail; - } } fail: - if (status < 0) - dev_dbg(dev, "can't setup chip %d, --> %d\n", - addr, status); - return status; + if (ret < 0) + dev_dbg(dev, "can't setup chip %d, --> %d\n", addr, ret); + return ret; } /*----------------------------------------------------------------------*/ diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c index 54e5d8257d34..b1cf76dd84ba 100644 --- a/drivers/gpio/gpio-mm-lantiq.c +++ b/drivers/gpio/gpio-mm-lantiq.c @@ -3,7 +3,7 @@ * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * - * Copyright (C) 2012 John Crispin <blogic@openwrt.org> + * Copyright (C) 2012 John Crispin <john@phrozen.org> */ #include <linux/init.h> diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index 1ef85b0c2b1f..d99338689213 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -14,14 +14,23 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/gpio/driver.h> +#include <linux/gpio/consumer.h> #include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irq_work.h> +#include <linux/debugfs.h> +#include <linux/uaccess.h> -#define GPIO_NAME "gpio-mockup" -#define MAX_GC 10 +#include "gpiolib.h" -enum direction { - OUT, - IN +#define GPIO_MOCKUP_NAME "gpio-mockup" +#define GPIO_MOCKUP_MAX_GC 10 + +enum { + DIR_IN = 0, + DIR_OUT, }; /* @@ -29,150 +38,359 @@ enum direction { * @dir: Configures direction of gpio as "in" or "out", 0=in, 1=out * @value: Configures status of the gpio as 0(low) or 1(high) */ -struct gpio_pin_status { - enum direction dir; +struct gpio_mockup_line_status { + int dir; bool value; }; -struct mockup_gpio_controller { +struct gpio_mockup_irq_context { + struct irq_work work; + int irq; +}; + +struct gpio_mockup_chip { struct gpio_chip gc; - struct gpio_pin_status *stats; + struct gpio_mockup_line_status *lines; + struct gpio_mockup_irq_context irq_ctx; + struct dentry *dbg_dir; }; -static int gpio_mockup_ranges[MAX_GC << 1]; +struct gpio_mockup_dbgfs_private { + struct gpio_mockup_chip *chip; + struct gpio_desc *desc; + int offset; +}; + +static int gpio_mockup_ranges[GPIO_MOCKUP_MAX_GC << 1]; static int gpio_mockup_params_nr; module_param_array(gpio_mockup_ranges, int, &gpio_mockup_params_nr, 0400); -const char pins_name_start = 'A'; +static bool gpio_mockup_named_lines; +module_param_named(gpio_mockup_named_lines, + gpio_mockup_named_lines, bool, 0400); + +static const char gpio_mockup_name_start = 'A'; +static struct dentry *gpio_mockup_dbg_dir; -static int mockup_gpio_get(struct gpio_chip *gc, unsigned int offset) +static int gpio_mockup_get(struct gpio_chip *gc, unsigned int offset) { - struct mockup_gpio_controller *cntr = gpiochip_get_data(gc); + struct gpio_mockup_chip *chip = gpiochip_get_data(gc); - return cntr->stats[offset].value; + return chip->lines[offset].value; } -static void mockup_gpio_set(struct gpio_chip *gc, unsigned int offset, +static void gpio_mockup_set(struct gpio_chip *gc, unsigned int offset, int value) { - struct mockup_gpio_controller *cntr = gpiochip_get_data(gc); + struct gpio_mockup_chip *chip = gpiochip_get_data(gc); - cntr->stats[offset].value = !!value; + chip->lines[offset].value = !!value; } -static int mockup_gpio_dirout(struct gpio_chip *gc, unsigned int offset, +static int gpio_mockup_dirout(struct gpio_chip *gc, unsigned int offset, int value) { - struct mockup_gpio_controller *cntr = gpiochip_get_data(gc); + struct gpio_mockup_chip *chip = gpiochip_get_data(gc); + + gpio_mockup_set(gc, offset, value); + chip->lines[offset].dir = DIR_OUT; + + return 0; +} + +static int gpio_mockup_dirin(struct gpio_chip *gc, unsigned int offset) +{ + struct gpio_mockup_chip *chip = gpiochip_get_data(gc); + + chip->lines[offset].dir = DIR_IN; + + return 0; +} + +static int gpio_mockup_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct gpio_mockup_chip *chip = gpiochip_get_data(gc); + + return chip->lines[offset].dir; +} + +static int gpio_mockup_name_lines(struct device *dev, + struct gpio_mockup_chip *chip) +{ + struct gpio_chip *gc = &chip->gc; + char **names; + int i; + + names = devm_kzalloc(dev, sizeof(char *) * gc->ngpio, GFP_KERNEL); + if (!names) + return -ENOMEM; + + for (i = 0; i < gc->ngpio; i++) { + names[i] = devm_kasprintf(dev, GFP_KERNEL, + "%s-%d", gc->label, i); + if (!names[i]) + return -ENOMEM; + } + + gc->names = (const char *const *)names; - mockup_gpio_set(gc, offset, value); - cntr->stats[offset].dir = OUT; return 0; } -static int mockup_gpio_dirin(struct gpio_chip *gc, unsigned int offset) +static int gpio_mockup_to_irq(struct gpio_chip *chip, unsigned int offset) { - struct mockup_gpio_controller *cntr = gpiochip_get_data(gc); + return chip->irq_base + offset; +} + +/* + * While we should generally support irqmask and irqunmask, this driver is + * for testing purposes only so we don't care. + */ +static void gpio_mockup_irqmask(struct irq_data *d) { } +static void gpio_mockup_irqunmask(struct irq_data *d) { } + +static struct irq_chip gpio_mockup_irqchip = { + .name = GPIO_MOCKUP_NAME, + .irq_mask = gpio_mockup_irqmask, + .irq_unmask = gpio_mockup_irqunmask, +}; + +static void gpio_mockup_handle_irq(struct irq_work *work) +{ + struct gpio_mockup_irq_context *irq_ctx; + + irq_ctx = container_of(work, struct gpio_mockup_irq_context, work); + handle_simple_irq(irq_to_desc(irq_ctx->irq)); +} + +static int gpio_mockup_irqchip_setup(struct device *dev, + struct gpio_mockup_chip *chip) +{ + struct gpio_chip *gc = &chip->gc; + int irq_base, i; + + irq_base = irq_alloc_descs(-1, 0, gc->ngpio, 0); + if (irq_base < 0) + return irq_base; + + gc->irq_base = irq_base; + gc->irqchip = &gpio_mockup_irqchip; + + for (i = 0; i < gc->ngpio; i++) { + irq_set_chip(irq_base + i, gc->irqchip); + irq_set_handler(irq_base + i, &handle_simple_irq); + irq_modify_status(irq_base + i, + IRQ_NOREQUEST | IRQ_NOAUTOEN, IRQ_NOPROBE); + } + + init_irq_work(&chip->irq_ctx.work, gpio_mockup_handle_irq); - cntr->stats[offset].dir = IN; return 0; } -static int mockup_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +static ssize_t gpio_mockup_event_write(struct file *file, + const char __user *usr_buf, + size_t size, loff_t *ppos) +{ + struct gpio_mockup_dbgfs_private *priv; + struct gpio_mockup_chip *chip; + struct seq_file *sfile; + struct gpio_desc *desc; + struct gpio_chip *gc; + int val; + char buf; + + sfile = file->private_data; + priv = sfile->private; + desc = priv->desc; + chip = priv->chip; + gc = &chip->gc; + + if (copy_from_user(&buf, usr_buf, 1)) + return -EFAULT; + + if (buf == '0') + val = 0; + else if (buf == '1') + val = 1; + else + return -EINVAL; + + gpiod_set_value_cansleep(desc, val); + priv->chip->irq_ctx.irq = gc->irq_base + priv->offset; + irq_work_queue(&priv->chip->irq_ctx.work); + + return size; +} + +static int gpio_mockup_event_open(struct inode *inode, struct file *file) +{ + return single_open(file, NULL, inode->i_private); +} + +static const struct file_operations gpio_mockup_event_ops = { + .owner = THIS_MODULE, + .open = gpio_mockup_event_open, + .write = gpio_mockup_event_write, + .llseek = no_llseek, +}; + +static void gpio_mockup_debugfs_setup(struct device *dev, + struct gpio_mockup_chip *chip) { - struct mockup_gpio_controller *cntr = gpiochip_get_data(gc); + struct gpio_mockup_dbgfs_private *priv; + struct dentry *evfile; + struct gpio_chip *gc; + char *name; + int i; + + gc = &chip->gc; - return cntr->stats[offset].dir; + chip->dbg_dir = debugfs_create_dir(gc->label, gpio_mockup_dbg_dir); + if (!chip->dbg_dir) + goto err; + + for (i = 0; i < gc->ngpio; i++) { + name = devm_kasprintf(dev, GFP_KERNEL, "%d", i); + if (!name) + goto err; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + goto err; + + priv->chip = chip; + priv->offset = i; + priv->desc = &gc->gpiodev->descs[i]; + + evfile = debugfs_create_file(name, 0200, chip->dbg_dir, priv, + &gpio_mockup_event_ops); + if (!evfile) + goto err; + } + + return; + +err: + dev_err(dev, "error creating debugfs directory\n"); } -static int mockup_gpio_add(struct device *dev, - struct mockup_gpio_controller *cntr, +static int gpio_mockup_add(struct device *dev, + struct gpio_mockup_chip *chip, const char *name, int base, int ngpio) { + struct gpio_chip *gc = &chip->gc; int ret; - cntr->gc.base = base; - cntr->gc.ngpio = ngpio; - cntr->gc.label = name; - cntr->gc.owner = THIS_MODULE; - cntr->gc.parent = dev; - cntr->gc.get = mockup_gpio_get; - cntr->gc.set = mockup_gpio_set; - cntr->gc.direction_output = mockup_gpio_dirout; - cntr->gc.direction_input = mockup_gpio_dirin; - cntr->gc.get_direction = mockup_gpio_get_direction; - cntr->stats = devm_kzalloc(dev, sizeof(*cntr->stats) * cntr->gc.ngpio, + gc->base = base; + gc->ngpio = ngpio; + gc->label = name; + gc->owner = THIS_MODULE; + gc->parent = dev; + gc->get = gpio_mockup_get; + gc->set = gpio_mockup_set; + gc->direction_output = gpio_mockup_dirout; + gc->direction_input = gpio_mockup_dirin; + gc->get_direction = gpio_mockup_get_direction; + gc->to_irq = gpio_mockup_to_irq; + + chip->lines = devm_kzalloc(dev, sizeof(*chip->lines) * gc->ngpio, GFP_KERNEL); - if (!cntr->stats) { - ret = -ENOMEM; - goto err; + if (!chip->lines) + return -ENOMEM; + + if (gpio_mockup_named_lines) { + ret = gpio_mockup_name_lines(dev, chip); + if (ret) + return ret; } - ret = devm_gpiochip_add_data(dev, &cntr->gc, cntr); + + ret = gpio_mockup_irqchip_setup(dev, chip); if (ret) - goto err; + return ret; + + ret = devm_gpiochip_add_data(dev, &chip->gc, chip); + if (ret) + return ret; + + if (gpio_mockup_dbg_dir) + gpio_mockup_debugfs_setup(dev, chip); - dev_info(dev, "gpio<%d..%d> add successful!", base, base + ngpio); return 0; -err: - dev_err(dev, "gpio<%d..%d> add failed!", base, base + ngpio); - return ret; } -static int mockup_gpio_probe(struct platform_device *pdev) +static int gpio_mockup_probe(struct platform_device *pdev) { + struct gpio_mockup_chip *chips; struct device *dev = &pdev->dev; - struct mockup_gpio_controller *cntr; - int ret; - int i; - int base; - int ngpio; - char chip_name[sizeof(GPIO_NAME) + 3]; + int ret, i, base, ngpio; + char *chip_name; if (gpio_mockup_params_nr < 2) return -EINVAL; - cntr = devm_kzalloc(dev, sizeof(*cntr) * (gpio_mockup_params_nr >> 1), - GFP_KERNEL); - if (!cntr) + chips = devm_kzalloc(dev, + sizeof(*chips) * (gpio_mockup_params_nr >> 1), + GFP_KERNEL); + if (!chips) return -ENOMEM; - platform_set_drvdata(pdev, cntr); + platform_set_drvdata(pdev, chips); for (i = 0; i < gpio_mockup_params_nr >> 1; i++) { base = gpio_mockup_ranges[i * 2]; + if (base == -1) ngpio = gpio_mockup_ranges[i * 2 + 1]; else ngpio = gpio_mockup_ranges[i * 2 + 1] - base; if (ngpio >= 0) { - sprintf(chip_name, "%s-%c", GPIO_NAME, - pins_name_start + i); - ret = mockup_gpio_add(dev, &cntr[i], + chip_name = devm_kasprintf(dev, GFP_KERNEL, + "%s-%c", GPIO_MOCKUP_NAME, + gpio_mockup_name_start + i); + if (!chip_name) + return -ENOMEM; + + ret = gpio_mockup_add(dev, &chips[i], chip_name, base, ngpio); } else { ret = -1; } + if (ret) { - if (base < 0) - dev_err(dev, "gpio<%d..%d> add failed\n", - base, ngpio); - else - dev_err(dev, "gpio<%d..%d> add failed\n", - base, base + ngpio); + dev_err(dev, "gpio<%d..%d> add failed\n", + base, base < 0 ? ngpio : base + ngpio); return ret; } + + dev_info(dev, "gpio<%d..%d> add successful!", + base, base + ngpio); } return 0; } -static struct platform_driver mockup_gpio_driver = { +static int gpio_mockup_remove(struct platform_device *pdev) +{ + struct gpio_mockup_chip *chips; + int i; + + chips = platform_get_drvdata(pdev); + + for (i = 0; i < gpio_mockup_params_nr >> 1; i++) + irq_free_descs(chips[i].gc.irq_base, chips[i].gc.ngpio); + + return 0; +} + +static struct platform_driver gpio_mockup_driver = { .driver = { - .name = GPIO_NAME, - }, - .probe = mockup_gpio_probe, + .name = GPIO_MOCKUP_NAME, + }, + .probe = gpio_mockup_probe, + .remove = gpio_mockup_remove, }; static struct platform_device *pdev; @@ -180,7 +398,12 @@ static int __init mock_device_init(void) { int err; - pdev = platform_device_alloc(GPIO_NAME, -1); + gpio_mockup_dbg_dir = debugfs_create_dir("gpio-mockup-event", NULL); + if (!gpio_mockup_dbg_dir) + pr_err("%s: error creating debugfs directory\n", + GPIO_MOCKUP_NAME); + + pdev = platform_device_alloc(GPIO_MOCKUP_NAME, -1); if (!pdev) return -ENOMEM; @@ -190,7 +413,7 @@ static int __init mock_device_init(void) return err; } - err = platform_driver_register(&mockup_gpio_driver); + err = platform_driver_register(&gpio_mockup_driver); if (err) { platform_device_unregister(pdev); return err; @@ -201,7 +424,8 @@ static int __init mock_device_init(void) static void __exit mock_device_exit(void) { - platform_driver_unregister(&mockup_gpio_driver); + debugfs_remove_recursive(gpio_mockup_dbg_dir); + platform_driver_unregister(&gpio_mockup_driver); platform_device_unregister(pdev); } diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index 1ed6132b993c..a649556ac3ca 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -659,7 +659,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev) match = of_match_device(mvebu_gpio_of_match, &pdev->dev); if (match) - soc_variant = (int) match->data; + soc_variant = (unsigned long) match->data; else soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION; diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index d5d72d84b719..d44232aadb6c 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -14,6 +14,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/platform_data/pca953x.h> @@ -754,8 +755,16 @@ static int pca953x_probe(struct i2c_client *client, invert = pdata->invert; chip->names = pdata->names; } else { + struct gpio_desc *reset_gpio; + chip->gpio_start = -1; irq_base = 0; + + /* See if we need to de-assert a reset pin */ + reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(reset_gpio)) + return PTR_ERR(reset_gpio); } chip->client = client; diff --git a/drivers/gpio/gpio-pci-idio-16.c b/drivers/gpio/gpio-pci-idio-16.c new file mode 100644 index 000000000000..269ab628634b --- /dev/null +++ b/drivers/gpio/gpio-pci-idio-16.c @@ -0,0 +1,349 @@ +/* + * GPIO driver for the ACCES PCI-IDIO-16 + * Copyright (C) 2017 William Breathitt Gray + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/bitops.h> +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/gpio/driver.h> +#include <linux/interrupt.h> +#include <linux/irqdesc.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/spinlock.h> +#include <linux/types.h> + +/** + * struct idio_16_gpio_reg - GPIO device registers structure + * @out0_7: Read: FET Drive Outputs 0-7 + * Write: FET Drive Outputs 0-7 + * @in0_7: Read: Isolated Inputs 0-7 + * Write: Clear Interrupt + * @irq_ctl: Read: Enable IRQ + * Write: Disable IRQ + * @filter_ctl: Read: Activate Input Filters 0-15 + * Write: Deactivate Input Filters 0-15 + * @out8_15: Read: FET Drive Outputs 8-15 + * Write: FET Drive Outputs 8-15 + * @in8_15: Read: Isolated Inputs 8-15 + * Write: Unused + * @irq_status: Read: Interrupt status + * Write: Unused + */ +struct idio_16_gpio_reg { + u8 out0_7; + u8 in0_7; + u8 irq_ctl; + u8 filter_ctl; + u8 out8_15; + u8 in8_15; + u8 irq_status; +}; + +/** + * struct idio_16_gpio - GPIO device private data structure + * @chip: instance of the gpio_chip + * @lock: synchronization lock to prevent I/O race conditions + * @reg: I/O address offset for the GPIO device registers + * @irq_mask: I/O bits affected by interrupts + */ +struct idio_16_gpio { + struct gpio_chip chip; + spinlock_t lock; + struct idio_16_gpio_reg __iomem *reg; + unsigned long irq_mask; +}; + +static int idio_16_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + if (offset > 15) + return 1; + + return 0; +} + +static int idio_16_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + return 0; +} + +static int idio_16_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + chip->set(chip, offset, value); + return 0; +} + +static int idio_16_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + unsigned long mask = BIT(offset); + + if (offset < 8) + return !!(ioread8(&idio16gpio->reg->out0_7) & mask); + + if (offset < 16) + return !!(ioread8(&idio16gpio->reg->out8_15) & (mask >> 8)); + + if (offset < 24) + return !!(ioread8(&idio16gpio->reg->in0_7) & (mask >> 16)); + + return !!(ioread8(&idio16gpio->reg->in8_15) & (mask >> 24)); +} + +static void idio_16_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + unsigned int mask = BIT(offset); + void __iomem *base; + unsigned long flags; + unsigned int out_state; + + if (offset > 15) + return; + + if (offset > 7) { + mask >>= 8; + base = &idio16gpio->reg->out8_15; + } else + base = &idio16gpio->reg->out0_7; + + spin_lock_irqsave(&idio16gpio->lock, flags); + + if (value) + out_state = ioread8(base) | mask; + else + out_state = ioread8(base) & ~mask; + + iowrite8(out_state, base); + + spin_unlock_irqrestore(&idio16gpio->lock, flags); +} + +static void idio_16_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + unsigned long flags; + unsigned int out_state; + + spin_lock_irqsave(&idio16gpio->lock, flags); + + /* process output lines 0-7 */ + if (*mask & 0xFF) { + out_state = ioread8(&idio16gpio->reg->out0_7) & ~*mask; + out_state |= *mask & *bits; + iowrite8(out_state, &idio16gpio->reg->out0_7); + } + + /* shift to next output line word */ + *mask >>= 8; + + /* process output lines 8-15 */ + if (*mask & 0xFF) { + *bits >>= 8; + out_state = ioread8(&idio16gpio->reg->out8_15) & ~*mask; + out_state |= *mask & *bits; + iowrite8(out_state, &idio16gpio->reg->out8_15); + } + + spin_unlock_irqrestore(&idio16gpio->lock, flags); +} + +static void idio_16_irq_ack(struct irq_data *data) +{ +} + +static void idio_16_irq_mask(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + const unsigned long mask = BIT(irqd_to_hwirq(data)); + unsigned long flags; + + idio16gpio->irq_mask &= ~mask; + + if (!idio16gpio->irq_mask) { + spin_lock_irqsave(&idio16gpio->lock, flags); + + iowrite8(0, &idio16gpio->reg->irq_ctl); + + spin_unlock_irqrestore(&idio16gpio->lock, flags); + } +} + +static void idio_16_irq_unmask(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + const unsigned long mask = BIT(irqd_to_hwirq(data)); + const unsigned long prev_irq_mask = idio16gpio->irq_mask; + unsigned long flags; + + idio16gpio->irq_mask |= mask; + + if (!prev_irq_mask) { + spin_lock_irqsave(&idio16gpio->lock, flags); + + ioread8(&idio16gpio->reg->irq_ctl); + + spin_unlock_irqrestore(&idio16gpio->lock, flags); + } +} + +static int idio_16_irq_set_type(struct irq_data *data, unsigned int flow_type) +{ + /* The only valid irq types are none and both-edges */ + if (flow_type != IRQ_TYPE_NONE && + (flow_type & IRQ_TYPE_EDGE_BOTH) != IRQ_TYPE_EDGE_BOTH) + return -EINVAL; + + return 0; +} + +static struct irq_chip idio_16_irqchip = { + .name = "pci-idio-16", + .irq_ack = idio_16_irq_ack, + .irq_mask = idio_16_irq_mask, + .irq_unmask = idio_16_irq_unmask, + .irq_set_type = idio_16_irq_set_type +}; + +static irqreturn_t idio_16_irq_handler(int irq, void *dev_id) +{ + struct idio_16_gpio *const idio16gpio = dev_id; + unsigned int irq_status; + struct gpio_chip *const chip = &idio16gpio->chip; + int gpio; + + spin_lock(&idio16gpio->lock); + + irq_status = ioread8(&idio16gpio->reg->irq_status); + + spin_unlock(&idio16gpio->lock); + + /* Make sure our device generated IRQ */ + if (!(irq_status & 0x3) || !(irq_status & 0x4)) + return IRQ_NONE; + + for_each_set_bit(gpio, &idio16gpio->irq_mask, chip->ngpio) + generic_handle_irq(irq_find_mapping(chip->irqdomain, gpio)); + + spin_lock(&idio16gpio->lock); + + /* Clear interrupt */ + iowrite8(0, &idio16gpio->reg->in0_7); + + spin_unlock(&idio16gpio->lock); + + return IRQ_HANDLED; +} + +#define IDIO_16_NGPIO 32 +static const char *idio_16_names[IDIO_16_NGPIO] = { + "OUT0", "OUT1", "OUT2", "OUT3", "OUT4", "OUT5", "OUT6", "OUT7", + "OUT8", "OUT9", "OUT10", "OUT11", "OUT12", "OUT13", "OUT14", "OUT15", + "IIN0", "IIN1", "IIN2", "IIN3", "IIN4", "IIN5", "IIN6", "IIN7", + "IIN8", "IIN9", "IIN10", "IIN11", "IIN12", "IIN13", "IIN14", "IIN15" +}; + +static int idio_16_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct device *const dev = &pdev->dev; + struct idio_16_gpio *idio16gpio; + int err; + const size_t pci_bar_index = 2; + const char *const name = pci_name(pdev); + + idio16gpio = devm_kzalloc(dev, sizeof(*idio16gpio), GFP_KERNEL); + if (!idio16gpio) + return -ENOMEM; + + err = pcim_enable_device(pdev); + if (err) { + dev_err(dev, "Failed to enable PCI device (%d)\n", err); + return err; + } + + err = pcim_iomap_regions(pdev, BIT(pci_bar_index), name); + if (err) { + dev_err(dev, "Unable to map PCI I/O addresses (%d)\n", err); + return err; + } + + idio16gpio->reg = pcim_iomap_table(pdev)[pci_bar_index]; + + /* Deactivate input filters */ + iowrite8(0, &idio16gpio->reg->filter_ctl); + + idio16gpio->chip.label = name; + idio16gpio->chip.parent = dev; + idio16gpio->chip.owner = THIS_MODULE; + idio16gpio->chip.base = -1; + idio16gpio->chip.ngpio = IDIO_16_NGPIO; + idio16gpio->chip.names = idio_16_names; + idio16gpio->chip.get_direction = idio_16_gpio_get_direction; + idio16gpio->chip.direction_input = idio_16_gpio_direction_input; + idio16gpio->chip.direction_output = idio_16_gpio_direction_output; + idio16gpio->chip.get = idio_16_gpio_get; + idio16gpio->chip.set = idio_16_gpio_set; + idio16gpio->chip.set_multiple = idio_16_gpio_set_multiple; + + spin_lock_init(&idio16gpio->lock); + + err = devm_gpiochip_add_data(dev, &idio16gpio->chip, idio16gpio); + if (err) { + dev_err(dev, "GPIO registering failed (%d)\n", err); + return err; + } + + /* Disable IRQ by default and clear any pending interrupt */ + iowrite8(0, &idio16gpio->reg->irq_ctl); + iowrite8(0, &idio16gpio->reg->in0_7); + + err = gpiochip_irqchip_add(&idio16gpio->chip, &idio_16_irqchip, 0, + handle_edge_irq, IRQ_TYPE_NONE); + if (err) { + dev_err(dev, "Could not add irqchip (%d)\n", err); + return err; + } + + err = devm_request_irq(dev, pdev->irq, idio_16_irq_handler, IRQF_SHARED, + name, idio16gpio); + if (err) { + dev_err(dev, "IRQ handler registering failed (%d)\n", err); + return err; + } + + return 0; +} + +static const struct pci_device_id idio_16_pci_dev_id[] = { + { PCI_DEVICE(0x494F, 0x0DC8) }, { 0 } +}; +MODULE_DEVICE_TABLE(pci, idio_16_pci_dev_id); + +static struct pci_driver idio_16_driver = { + .name = "pci-idio-16", + .id_table = idio_16_pci_dev_id, + .probe = idio_16_probe +}; + +module_pci_driver(idio_16_driver); + +MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); +MODULE_DESCRIPTION("ACCES PCI-IDIO-16 GPIO driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c index 2be48f5eba36..31ad288846af 100644 --- a/drivers/gpio/gpio-rcar.c +++ b/drivers/gpio/gpio-rcar.c @@ -242,11 +242,24 @@ static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip, static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset) { - return pinctrl_request_gpio(chip->base + offset); + struct gpio_rcar_priv *p = gpiochip_get_data(chip); + int error; + + error = pm_runtime_get_sync(&p->pdev->dev); + if (error < 0) + return error; + + error = pinctrl_request_gpio(chip->base + offset); + if (error) + pm_runtime_put(&p->pdev->dev); + + return error; } static void gpio_rcar_free(struct gpio_chip *chip, unsigned offset) { + struct gpio_rcar_priv *p = gpiochip_get_data(chip); + pinctrl_free_gpio(chip->base + offset); /* @@ -254,6 +267,8 @@ static void gpio_rcar_free(struct gpio_chip *chip, unsigned offset) * drive the GPIO pin as an output. */ gpio_rcar_config_general_input_output_mode(chip, offset, false); + + pm_runtime_put(&p->pdev->dev); } static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset) @@ -426,7 +441,6 @@ static int gpio_rcar_probe(struct platform_device *pdev) } pm_runtime_enable(dev); - pm_runtime_get_sync(dev); io = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); @@ -460,6 +474,7 @@ static int gpio_rcar_probe(struct platform_device *pdev) irq_chip = &p->irq_chip; irq_chip->name = name; + irq_chip->parent_device = dev; irq_chip->irq_mask = gpio_rcar_irq_disable; irq_chip->irq_unmask = gpio_rcar_irq_enable; irq_chip->irq_set_type = gpio_rcar_irq_set_type; @@ -494,7 +509,6 @@ static int gpio_rcar_probe(struct platform_device *pdev) err1: gpiochip_remove(gpio_chip); err0: - pm_runtime_put(dev); pm_runtime_disable(dev); return ret; } @@ -505,7 +519,6 @@ static int gpio_rcar_remove(struct platform_device *pdev) gpiochip_remove(&p->gpio_chip); - pm_runtime_put(&pdev->dev); pm_runtime_disable(&pdev->dev); return 0; } diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c index 19e654f88b3a..c07385b71403 100644 --- a/drivers/gpio/gpio-stp-xway.c +++ b/drivers/gpio/gpio-stp-xway.c @@ -3,7 +3,7 @@ * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * - * Copyright (C) 2012 John Crispin <blogic@openwrt.org> + * Copyright (C) 2012 John Crispin <john@phrozen.org> * */ diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c index eaa71d440ccf..901b5ccb032d 100644 --- a/drivers/gpio/gpio-ws16c48.c +++ b/drivers/gpio/gpio-ws16c48.c @@ -46,7 +46,6 @@ MODULE_PARM_DESC(irq, "WinSystems WS16C48 interrupt line numbers"); * @irq_mask: I/O bits affected by interrupts * @flow_mask: IRQ flow type mask for the respective I/O bits * @base: base port address of the GPIO device - * @irq: Interrupt line number */ struct ws16c48_gpio { struct gpio_chip chip; @@ -56,7 +55,6 @@ struct ws16c48_gpio { unsigned long irq_mask; unsigned long flow_mask; unsigned base; - unsigned irq; }; static int ws16c48_gpio_get_direction(struct gpio_chip *chip, unsigned offset) @@ -155,6 +153,46 @@ static void ws16c48_gpio_set(struct gpio_chip *chip, unsigned offset, int value) spin_unlock_irqrestore(&ws16c48gpio->lock, flags); } +static void ws16c48_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(chip); + unsigned int i; + const unsigned int gpio_reg_size = 8; + unsigned int port; + unsigned int iomask; + unsigned int bitmask; + unsigned long flags; + + /* set bits are evaluated a gpio register size at a time */ + for (i = 0; i < chip->ngpio; i += gpio_reg_size) { + /* no more set bits in this mask word; skip to the next word */ + if (!mask[BIT_WORD(i)]) { + i = (BIT_WORD(i) + 1) * BITS_PER_LONG - gpio_reg_size; + continue; + } + + port = i / gpio_reg_size; + + /* mask out GPIO configured for input */ + iomask = mask[BIT_WORD(i)] & ~ws16c48gpio->io_state[port]; + bitmask = iomask & bits[BIT_WORD(i)]; + + spin_lock_irqsave(&ws16c48gpio->lock, flags); + + /* update output state data and set device gpio register */ + ws16c48gpio->out_state[port] &= ~iomask; + ws16c48gpio->out_state[port] |= bitmask; + outb(ws16c48gpio->out_state[port], ws16c48gpio->base + port); + + spin_unlock_irqrestore(&ws16c48gpio->lock, flags); + + /* prepare for next gpio register set */ + mask[BIT_WORD(i)] >>= gpio_reg_size; + bits[BIT_WORD(i)] >>= gpio_reg_size; + } +} + static void ws16c48_irq_ack(struct irq_data *data) { struct gpio_chip *chip = irq_data_get_irq_chip_data(data); @@ -303,6 +341,22 @@ static irqreturn_t ws16c48_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +#define WS16C48_NGPIO 48 +static const char *ws16c48_names[WS16C48_NGPIO] = { + "Port 0 Bit 0", "Port 0 Bit 1", "Port 0 Bit 2", "Port 0 Bit 3", + "Port 0 Bit 4", "Port 0 Bit 5", "Port 0 Bit 6", "Port 0 Bit 7", + "Port 1 Bit 0", "Port 1 Bit 1", "Port 1 Bit 2", "Port 1 Bit 3", + "Port 1 Bit 4", "Port 1 Bit 5", "Port 1 Bit 6", "Port 1 Bit 7", + "Port 2 Bit 0", "Port 2 Bit 1", "Port 2 Bit 2", "Port 2 Bit 3", + "Port 2 Bit 4", "Port 2 Bit 5", "Port 2 Bit 6", "Port 2 Bit 7", + "Port 3 Bit 0", "Port 3 Bit 1", "Port 3 Bit 2", "Port 3 Bit 3", + "Port 3 Bit 4", "Port 3 Bit 5", "Port 3 Bit 6", "Port 3 Bit 7", + "Port 4 Bit 0", "Port 4 Bit 1", "Port 4 Bit 2", "Port 4 Bit 3", + "Port 4 Bit 4", "Port 4 Bit 5", "Port 4 Bit 6", "Port 4 Bit 7", + "Port 5 Bit 0", "Port 5 Bit 1", "Port 5 Bit 2", "Port 5 Bit 3", + "Port 5 Bit 4", "Port 5 Bit 5", "Port 5 Bit 6", "Port 5 Bit 7" +}; + static int ws16c48_probe(struct device *dev, unsigned int id) { struct ws16c48_gpio *ws16c48gpio; @@ -323,20 +377,19 @@ static int ws16c48_probe(struct device *dev, unsigned int id) ws16c48gpio->chip.parent = dev; ws16c48gpio->chip.owner = THIS_MODULE; ws16c48gpio->chip.base = -1; - ws16c48gpio->chip.ngpio = 48; + ws16c48gpio->chip.ngpio = WS16C48_NGPIO; + ws16c48gpio->chip.names = ws16c48_names; ws16c48gpio->chip.get_direction = ws16c48_gpio_get_direction; ws16c48gpio->chip.direction_input = ws16c48_gpio_direction_input; ws16c48gpio->chip.direction_output = ws16c48_gpio_direction_output; ws16c48gpio->chip.get = ws16c48_gpio_get; ws16c48gpio->chip.set = ws16c48_gpio_set; + ws16c48gpio->chip.set_multiple = ws16c48_gpio_set_multiple; ws16c48gpio->base = base[id]; - ws16c48gpio->irq = irq[id]; spin_lock_init(&ws16c48gpio->lock); - dev_set_drvdata(dev, ws16c48gpio); - - err = gpiochip_add_data(&ws16c48gpio->chip, ws16c48gpio); + err = devm_gpiochip_add_data(dev, &ws16c48gpio->chip, ws16c48gpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); return err; @@ -353,31 +406,17 @@ static int ws16c48_probe(struct device *dev, unsigned int id) handle_edge_irq, IRQ_TYPE_NONE); if (err) { dev_err(dev, "Could not add irqchip (%d)\n", err); - goto err_gpiochip_remove; + return err; } - err = request_irq(irq[id], ws16c48_irq_handler, IRQF_SHARED, name, - ws16c48gpio); + err = devm_request_irq(dev, irq[id], ws16c48_irq_handler, IRQF_SHARED, + name, ws16c48gpio); if (err) { dev_err(dev, "IRQ handler registering failed (%d)\n", err); - goto err_gpiochip_remove; + return err; } return 0; - -err_gpiochip_remove: - gpiochip_remove(&ws16c48gpio->chip); - return err; -} - -static int ws16c48_remove(struct device *dev, unsigned int id) -{ - struct ws16c48_gpio *const ws16c48gpio = dev_get_drvdata(dev); - - free_irq(ws16c48gpio->irq, ws16c48gpio); - gpiochip_remove(&ws16c48gpio->chip); - - return 0; } static struct isa_driver ws16c48_driver = { @@ -385,7 +424,6 @@ static struct isa_driver ws16c48_driver = { .driver = { .name = "ws16c48" }, - .remove = ws16c48_remove }; module_isa_driver(ws16c48_driver, num_ws16c48); diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index 40a8881c2ce8..f1c6ec17b90a 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -42,9 +42,7 @@ struct xgene_gpio { struct gpio_chip chip; void __iomem *base; spinlock_t lock; -#ifdef CONFIG_PM u32 set_dr_val[XGENE_MAX_GPIO_BANKS]; -#endif }; static int xgene_gpio_get(struct gpio_chip *gc, unsigned int offset) @@ -138,8 +136,7 @@ static int xgene_gpio_dir_out(struct gpio_chip *gc, return 0; } -#ifdef CONFIG_PM -static int xgene_gpio_suspend(struct device *dev) +static __maybe_unused int xgene_gpio_suspend(struct device *dev) { struct xgene_gpio *gpio = dev_get_drvdata(dev); unsigned long bank_offset; @@ -152,7 +149,7 @@ static int xgene_gpio_suspend(struct device *dev) return 0; } -static int xgene_gpio_resume(struct device *dev) +static __maybe_unused int xgene_gpio_resume(struct device *dev) { struct xgene_gpio *gpio = dev_get_drvdata(dev); unsigned long bank_offset; @@ -166,10 +163,6 @@ static int xgene_gpio_resume(struct device *dev) } static SIMPLE_DEV_PM_OPS(xgene_gpio_pm, xgene_gpio_suspend, xgene_gpio_resume); -#define XGENE_GPIO_PM_OPS (&xgene_gpio_pm) -#else -#define XGENE_GPIO_PM_OPS NULL -#endif static int xgene_gpio_probe(struct platform_device *pdev) { @@ -241,7 +234,7 @@ static struct platform_driver xgene_gpio_driver = { .name = "xgene-gpio", .of_match_table = xgene_gpio_of_match, .acpi_match_table = ACPI_PTR(xgene_gpio_acpi_match), - .pm = XGENE_GPIO_PM_OPS, + .pm = &xgene_gpio_pm, }, .probe = xgene_gpio_probe, }; diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index a3faefa44f68..9b37a3692b3f 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -416,9 +416,8 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; /* - * ActiveLow is only specified for GpioInt resource. If - * GpioIo is used then the only way to set the flag is - * to use _DSD "gpios" property. + * Polarity and triggering are only specified for GpioInt + * resource. * Note: we expect here: * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 92b185f19232..975b9f6cf408 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -160,6 +160,7 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, * of_parse_own_gpio() - Get a GPIO hog descriptor, names and flags for GPIO API * @np: device node to get GPIO from * @chip: GPIO chip whose hog is parsed + * @idx: Index of the GPIO to parse * @name: GPIO line name * @lflags: gpio_lookup_flags - returned from of_find_gpio() or * of_parse_own_gpio() @@ -170,7 +171,7 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, */ static struct gpio_desc *of_parse_own_gpio(struct device_node *np, struct gpio_chip *chip, - const char **name, + unsigned int idx, const char **name, enum gpio_lookup_flags *lflags, enum gpiod_flags *dflags) { @@ -178,6 +179,7 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np, enum of_gpio_flags xlate_flags; struct of_phandle_args gpiospec; struct gpio_desc *desc; + unsigned int i; u32 tmp; int ret; @@ -196,9 +198,12 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np, gpiospec.np = chip_np; gpiospec.args_count = tmp; - ret = of_property_read_u32_array(np, "gpios", gpiospec.args, tmp); - if (ret) - return ERR_PTR(ret); + for (i = 0; i < tmp; i++) { + ret = of_property_read_u32_index(np, "gpios", idx * tmp + i, + &gpiospec.args[i]); + if (ret) + return ERR_PTR(ret); + } desc = of_xlate_and_get_gpiod_flags(chip, &gpiospec, &xlate_flags); if (IS_ERR(desc)) @@ -240,20 +245,24 @@ static int of_gpiochip_scan_gpios(struct gpio_chip *chip) const char *name; enum gpio_lookup_flags lflags; enum gpiod_flags dflags; + unsigned int i; int ret; for_each_available_child_of_node(chip->of_node, np) { if (!of_property_read_bool(np, "gpio-hog")) continue; - desc = of_parse_own_gpio(np, chip, &name, &lflags, &dflags); - if (IS_ERR(desc)) - continue; + for (i = 0;; i++) { + desc = of_parse_own_gpio(np, chip, i, &name, &lflags, + &dflags); + if (IS_ERR(desc)) + break; - ret = gpiod_hog(desc, name, lflags, dflags); - if (ret < 0) { - of_node_put(np); - return ret; + ret = gpiod_hog(desc, name, lflags, dflags); + if (ret < 0) { + of_node_put(np); + return ret; + } } } diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index d0478f1853db..8b4d721d6d63 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1,3 +1,4 @@ +#include <linux/bitops.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/interrupt.h> @@ -982,7 +983,7 @@ static int gpio_chrdev_open(struct inode *inode, struct file *filp) struct gpio_device, chrdev); /* Fail on open if the backing gpiochip is gone */ - if (!gdev || !gdev->chip) + if (!gdev->chip) return -ENODEV; get_device(&gdev->dev); filp->private_data = gdev; @@ -1001,8 +1002,6 @@ static int gpio_chrdev_release(struct inode *inode, struct file *filp) struct gpio_device *gdev = container_of(inode->i_cdev, struct gpio_device, chrdev); - if (!gdev) - return -ENODEV; put_device(&gdev->dev); return 0; } @@ -1423,8 +1422,7 @@ void devm_gpiochip_remove(struct device *dev, struct gpio_chip *chip) ret = devres_release(dev, devm_gpio_chip_release, devm_gpio_chip_match, chip); - if (!ret) - WARN_ON(ret); + WARN_ON(ret); } EXPORT_SYMBOL_GPL(devm_gpiochip_remove); @@ -2586,18 +2584,11 @@ static void gpio_chip_set_multiple(struct gpio_chip *chip, if (chip->set_multiple) { chip->set_multiple(chip, mask, bits); } else { - int i; - for (i = 0; i < chip->ngpio; i++) { - if (mask[BIT_WORD(i)] == 0) { - /* no more set bits in this mask word; - * skip ahead to the next word */ - i = (BIT_WORD(i) + 1) * BITS_PER_LONG - 1; - continue; - } - /* set outputs if the corresponding mask bit is set */ - if (__test_and_clear_bit(i, mask)) - chip->set(chip, i, test_bit(i, bits)); - } + unsigned int i; + + /* set outputs if the corresponding mask bit is set */ + for_each_set_bit(i, mask, chip->ngpio) + chip->set(chip, i, test_bit(i, bits)); } } @@ -3325,6 +3316,8 @@ EXPORT_SYMBOL_GPL(gpiod_get_index); * fwnode_get_named_gpiod - obtain a GPIO from firmware node * @fwnode: handle of the firmware node * @propname: name of the firmware property representing the GPIO + * @index: index of the GPIO to obtain in the consumer + * @dflags: GPIO initialization flags * * This function can be used for drivers that get their configuration * from firmware. @@ -3333,12 +3326,18 @@ EXPORT_SYMBOL_GPL(gpiod_get_index); * underlying firmware interface and then makes sure that the GPIO * descriptor is requested before it is returned to the caller. * + * On successfull request the GPIO pin is configured in accordance with + * provided @dflags. + * * In case of error an ERR_PTR() is returned. */ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, - const char *propname) + const char *propname, int index, + enum gpiod_flags dflags, + const char *label) { struct gpio_desc *desc = ERR_PTR(-ENODEV); + unsigned long lflags = 0; bool active_low = false; bool single_ended = false; int ret; @@ -3349,8 +3348,8 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, if (is_of_node(fwnode)) { enum of_gpio_flags flags; - desc = of_get_named_gpiod_flags(to_of_node(fwnode), propname, 0, - &flags); + desc = of_get_named_gpiod_flags(to_of_node(fwnode), propname, + index, &flags); if (!IS_ERR(desc)) { active_low = flags & OF_GPIO_ACTIVE_LOW; single_ended = flags & OF_GPIO_SINGLE_ENDED; @@ -3358,7 +3357,7 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, } else if (is_acpi_node(fwnode)) { struct acpi_gpio_info info; - desc = acpi_node_get_gpiod(fwnode, propname, 0, &info); + desc = acpi_node_get_gpiod(fwnode, propname, index, &info); if (!IS_ERR(desc)) active_low = info.polarity == GPIO_ACTIVE_LOW; } @@ -3366,18 +3365,24 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, if (IS_ERR(desc)) return desc; - ret = gpiod_request(desc, NULL); + ret = gpiod_request(desc, label); if (ret) return ERR_PTR(ret); if (active_low) - set_bit(FLAG_ACTIVE_LOW, &desc->flags); + lflags |= GPIO_ACTIVE_LOW; if (single_ended) { if (active_low) - set_bit(FLAG_OPEN_DRAIN, &desc->flags); + lflags |= GPIO_OPEN_DRAIN; else - set_bit(FLAG_OPEN_SOURCE, &desc->flags); + lflags |= GPIO_OPEN_SOURCE; + } + + ret = gpiod_configure_flags(desc, propname, lflags, dflags); + if (ret < 0) { + gpiod_put(desc); + return ERR_PTR(ret); } return desc; diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index d10eaf520860..2495b7ee1b42 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -76,7 +76,8 @@ struct gpio_device { /** * struct acpi_gpio_info - ACPI GPIO specific information * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo - * @active_low: in case of @gpioint, the pin is active low + * @polarity: interrupt polarity as provided by ACPI + * @triggering: triggering type as provided by ACPI */ struct acpi_gpio_info { bool gpioint; |