diff options
Diffstat (limited to 'drivers/gpio')
45 files changed, 552 insertions, 285 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index b960f6f35abd..71c0ab46f216 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -22,6 +22,18 @@ menuconfig GPIOLIB if GPIOLIB +config GPIOLIB_FASTPATH_LIMIT + int "Maximum number of GPIOs for fast path" + range 32 512 + default 512 + help + This adjusts the point at which certain APIs will switch from + using a stack allocated buffer to a dynamically allocated buffer. + + You shouldn't need to change this unless you really need to + optimize either stack space or performance. Change this carefully + since setting an incorrect value could cause stack corruption. + config OF_GPIO def_bool y depends on OF diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c index 31e22c93e844..9c4e07fcb74b 100644 --- a/drivers/gpio/gpio-104-dio-48e.c +++ b/drivers/gpio/gpio-104-dio-48e.c @@ -188,7 +188,7 @@ static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, { struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip); size_t i; - const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; + static const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; const unsigned int gpio_reg_size = 8; unsigned int bits_offset; size_t word_index; diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c index f35632609379..2c9738adb3a6 100644 --- a/drivers/gpio/gpio-104-idi-48.c +++ b/drivers/gpio/gpio-104-idi-48.c @@ -94,7 +94,7 @@ static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, { struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip); size_t i; - const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; + static const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; const unsigned int gpio_reg_size = 8; unsigned int bits_offset; size_t word_index; diff --git a/drivers/gpio/gpio-74xx-mmio.c b/drivers/gpio/gpio-74xx-mmio.c index 0475e8ec96d0..49616ec815ee 100644 --- a/drivers/gpio/gpio-74xx-mmio.c +++ b/drivers/gpio/gpio-74xx-mmio.c @@ -105,27 +105,22 @@ static int mmio_74xx_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) static int mmio_74xx_gpio_probe(struct platform_device *pdev) { - const struct of_device_id *of_id; struct mmio_74xx_gpio_priv *priv; struct resource *res; void __iomem *dat; int err; - of_id = of_match_device(mmio_74xx_gpio_ids, &pdev->dev); - if (!of_id) - return -ENODEV; - priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; + priv->flags = (uintptr_t)of_device_get_match_data(&pdev->dev); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); dat = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(dat)) return PTR_ERR(dat); - priv->flags = (uintptr_t) of_id->data; - err = bgpio_init(&priv->gc, &pdev->dev, DIV_ROUND_UP(MMIO_74XX_BIT_CNT(priv->flags), 8), dat, NULL, NULL, NULL, NULL, 0); diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c index 6f693b7d5220..5e89f1c74a33 100644 --- a/drivers/gpio/gpio-aspeed.c +++ b/drivers/gpio/gpio-aspeed.c @@ -54,6 +54,8 @@ struct aspeed_gpio { u8 *offset_timer; unsigned int timer_users[4]; struct clk *clk; + + u32 *dcache; }; struct aspeed_gpio_bank { @@ -231,12 +233,13 @@ static void __aspeed_gpio_set(struct gpio_chip *gc, unsigned int offset, u32 reg; addr = bank_val_reg(gpio, bank, GPIO_DATA); - reg = ioread32(addr); + reg = gpio->dcache[GPIO_BANK(offset)]; if (val) reg |= GPIO_BIT(offset); else reg &= ~GPIO_BIT(offset); + gpio->dcache[GPIO_BANK(offset)] = reg; iowrite32(reg, addr); } @@ -287,11 +290,10 @@ static int aspeed_gpio_dir_out(struct gpio_chip *gc, spin_lock_irqsave(&gpio->lock, flags); + __aspeed_gpio_set(gc, offset, val); reg = ioread32(bank_val_reg(gpio, bank, GPIO_DIR)); iowrite32(reg | GPIO_BIT(offset), bank_val_reg(gpio, bank, GPIO_DIR)); - __aspeed_gpio_set(gc, offset, val); - spin_unlock_irqrestore(&gpio->lock, flags); return 0; @@ -852,7 +854,7 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev) const struct of_device_id *gpio_id; struct aspeed_gpio *gpio; struct resource *res; - int rc; + int rc, i, banks; gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); if (!gpio) @@ -893,6 +895,20 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev) gpio->chip.base = -1; gpio->chip.irq.need_valid_mask = true; + /* Allocate a cache of the output registers */ + banks = gpio->config->nr_gpios >> 5; + gpio->dcache = devm_kzalloc(&pdev->dev, + sizeof(u32) * banks, GFP_KERNEL); + if (!gpio->dcache) + return -ENOMEM; + + /* Populate it with initial values read from the HW */ + for (i = 0; i < banks; i++) { + const struct aspeed_gpio_bank *bank = &aspeed_gpio_banks[i]; + gpio->dcache[i] = ioread32(gpio->base + bank->val_regs + + GPIO_DATA); + } + rc = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio); if (rc < 0) return rc; diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 987126c4c6f6..b574ecff7761 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -610,14 +610,12 @@ done: return 0; } -#if IS_ENABLED(CONFIG_OF) static const struct of_device_id davinci_gpio_ids[] = { { .compatible = "ti,keystone-gpio", keystone_gpio_get_irq_chip}, { .compatible = "ti,dm6441-gpio", davinci_gpio_get_irq_chip}, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, davinci_gpio_ids); -#endif static struct platform_driver davinci_gpio_driver = { .probe = davinci_gpio_probe, diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 226977f78482..7a2de3de6571 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -441,14 +441,19 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, irq_gc->chip_types[1].handler = handle_edge_irq; if (!pp->irq_shared) { - irq_set_chained_handler_and_data(pp->irq, dwapb_irq_handler, - gpio); + int i; + + for (i = 0; i < pp->ngpio; i++) { + if (pp->irq[i] >= 0) + irq_set_chained_handler_and_data(pp->irq[i], + dwapb_irq_handler, gpio); + } } else { /* * Request a shared IRQ since where MFD would have devices * using the same irq pin */ - err = devm_request_irq(gpio->dev, pp->irq, + err = devm_request_irq(gpio->dev, pp->irq[0], dwapb_irq_handler_mfd, IRQF_SHARED, "gpio-dwapb-mfd", gpio); if (err) { @@ -524,7 +529,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, if (pp->idx == 0) port->gc.set_config = dwapb_gpio_set_config; - if (pp->irq) + if (pp->has_irq) dwapb_configure_irqs(gpio, port, pp); err = gpiochip_add_data(&port->gc, port); @@ -535,7 +540,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, port->is_registered = true; /* Add GPIO-signaled ACPI event support */ - if (pp->irq) + if (pp->has_irq) acpi_gpiochip_request_interrupts(&port->gc); return err; @@ -557,7 +562,7 @@ dwapb_gpio_get_pdata(struct device *dev) struct dwapb_platform_data *pdata; struct dwapb_port_property *pp; int nports; - int i; + int i, j; nports = device_get_child_node_count(dev); if (nports == 0) @@ -575,6 +580,8 @@ dwapb_gpio_get_pdata(struct device *dev) i = 0; device_for_each_child_node(dev, fwnode) { + struct device_node *np = NULL; + pp = &pdata->properties[i++]; pp->fwnode = fwnode; @@ -594,23 +601,35 @@ dwapb_gpio_get_pdata(struct device *dev) pp->ngpio = 32; } + pp->irq_shared = false; + pp->gpio_base = -1; + /* * Only port A can provide interrupts in all configurations of * the IP. */ - if (dev->of_node && pp->idx == 0 && - fwnode_property_read_bool(fwnode, + if (pp->idx != 0) + continue; + + if (dev->of_node && fwnode_property_read_bool(fwnode, "interrupt-controller")) { - pp->irq = irq_of_parse_and_map(to_of_node(fwnode), 0); - if (!pp->irq) - dev_warn(dev, "no irq for port%d\n", pp->idx); + np = to_of_node(fwnode); } - if (has_acpi_companion(dev) && pp->idx == 0) - pp->irq = platform_get_irq(to_platform_device(dev), 0); + for (j = 0; j < pp->ngpio; j++) { + pp->irq[j] = -ENXIO; - pp->irq_shared = false; - pp->gpio_base = -1; + if (np) + pp->irq[j] = of_irq_get(np, j); + else if (has_acpi_companion(dev)) + pp->irq[j] = platform_get_irq(to_platform_device(dev), j); + + if (pp->irq[j] >= 0) + pp->has_irq = true; + } + + if (!pp->has_irq) + dev_warn(dev, "no irq for port%d\n", pp->idx); } return pdata; @@ -684,13 +703,7 @@ static int dwapb_gpio_probe(struct platform_device *pdev) gpio->flags = 0; if (dev->of_node) { - const struct of_device_id *of_devid; - - of_devid = of_match_device(dwapb_of_match, dev); - if (of_devid) { - if (of_devid->data) - gpio->flags = (uintptr_t)of_devid->data; - } + gpio->flags = (uintptr_t)of_device_get_match_data(dev); } else if (has_acpi_companion(dev)) { const struct acpi_device_id *acpi_id; diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c index de7dd939c043..e0d6a0a7bc69 100644 --- a/drivers/gpio/gpio-eic-sprd.c +++ b/drivers/gpio/gpio-eic-sprd.c @@ -300,6 +300,7 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type) struct gpio_chip *chip = irq_data_get_irq_chip_data(data); struct sprd_eic *sprd_eic = gpiochip_get_data(chip); u32 offset = irqd_to_hwirq(data); + int state; switch (sprd_eic->type) { case SPRD_EIC_DEBOUNCE: @@ -310,6 +311,17 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type) case IRQ_TYPE_LEVEL_LOW: sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 0); break; + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_EDGE_FALLING: + case IRQ_TYPE_EDGE_BOTH: + state = sprd_eic_get(chip, offset); + if (state) + sprd_eic_update(chip, offset, + SPRD_EIC_DBNC_IEV, 0); + else + sprd_eic_update(chip, offset, + SPRD_EIC_DBNC_IEV, 1); + break; default: return -ENOTSUPP; } @@ -324,6 +336,17 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type) case IRQ_TYPE_LEVEL_LOW: sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 1); break; + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_EDGE_FALLING: + case IRQ_TYPE_EDGE_BOTH: + state = sprd_eic_get(chip, offset); + if (state) + sprd_eic_update(chip, offset, + SPRD_EIC_LATCH_INTPOL, 0); + else + sprd_eic_update(chip, offset, + SPRD_EIC_LATCH_INTPOL, 1); + break; default: return -ENOTSUPP; } @@ -405,6 +428,55 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type) return 0; } +static void sprd_eic_toggle_trigger(struct gpio_chip *chip, unsigned int irq, + unsigned int offset) +{ + struct sprd_eic *sprd_eic = gpiochip_get_data(chip); + struct irq_data *data = irq_get_irq_data(irq); + u32 trigger = irqd_get_trigger_type(data); + int state, post_state; + + /* + * The debounce EIC and latch EIC can only support level trigger, so we + * can toggle the level trigger to emulate the edge trigger. + */ + if ((sprd_eic->type != SPRD_EIC_DEBOUNCE && + sprd_eic->type != SPRD_EIC_LATCH) || + !(trigger & IRQ_TYPE_EDGE_BOTH)) + return; + + sprd_eic_irq_mask(data); + state = sprd_eic_get(chip, offset); + +retry: + switch (sprd_eic->type) { + case SPRD_EIC_DEBOUNCE: + if (state) + sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 0); + else + sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 1); + break; + case SPRD_EIC_LATCH: + if (state) + sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 0); + else + sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 1); + break; + default: + sprd_eic_irq_unmask(data); + return; + } + + post_state = sprd_eic_get(chip, offset); + if (state != post_state) { + dev_warn(chip->parent, "EIC level was changed.\n"); + state = post_state; + goto retry; + } + + sprd_eic_irq_unmask(data); +} + static int sprd_eic_match_chip_by_type(struct gpio_chip *chip, void *data) { enum sprd_eic_type type = *(enum sprd_eic_type *)data; @@ -448,6 +520,7 @@ static void sprd_eic_handle_one_type(struct gpio_chip *chip) bank * SPRD_EIC_PER_BANK_NR + n); generic_handle_irq(girq); + sprd_eic_toggle_trigger(chip, girq, n); } } } diff --git a/drivers/gpio/gpio-ge.c b/drivers/gpio/gpio-ge.c index 1fe2d3418f2f..636952769bc8 100644 --- a/drivers/gpio/gpio-ge.c +++ b/drivers/gpio/gpio-ge.c @@ -52,8 +52,6 @@ MODULE_DEVICE_TABLE(of, gef_gpio_ids); static int __init gef_gpio_probe(struct platform_device *pdev) { - const struct of_device_id *of_id = - of_match_device(gef_gpio_ids, &pdev->dev); struct gpio_chip *gc; void __iomem *regs; int ret; @@ -82,7 +80,7 @@ static int __init gef_gpio_probe(struct platform_device *pdev) } gc->base = -1; - gc->ngpio = (u16)(uintptr_t)of_id->data; + gc->ngpio = (u16)(uintptr_t)of_device_get_match_data(&pdev->dev); gc->of_gpio_n_cells = 2; gc->of_node = pdev->dev.of_node; diff --git a/drivers/gpio/gpio-gpio-mm.c b/drivers/gpio/gpio-gpio-mm.c index d496cc56c2a2..b56ff2efbf36 100644 --- a/drivers/gpio/gpio-gpio-mm.c +++ b/drivers/gpio/gpio-gpio-mm.c @@ -177,7 +177,7 @@ static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, { struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); size_t i; - const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; + static const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; const unsigned int gpio_reg_size = 8; unsigned int bits_offset; size_t word_index; diff --git a/drivers/gpio/gpio-ingenic.c b/drivers/gpio/gpio-ingenic.c index 15fb2bc796a8..e738e384a5ca 100644 --- a/drivers/gpio/gpio-ingenic.c +++ b/drivers/gpio/gpio-ingenic.c @@ -285,8 +285,6 @@ MODULE_DEVICE_TABLE(of, ingenic_gpio_of_match); static int ingenic_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - const struct of_device_id *of_id = of_match_device( - ingenic_gpio_of_match, dev); struct ingenic_gpio_chip *jzgc; u32 bank; int err; @@ -323,7 +321,7 @@ static int ingenic_gpio_probe(struct platform_device *pdev) jzgc->gc.parent = dev; jzgc->gc.of_node = dev->of_node; jzgc->gc.owner = THIS_MODULE; - jzgc->version = (enum jz_version)of_id->data; + jzgc->version = (enum jz_version)of_device_get_match_data(dev); jzgc->gc.set = ingenic_gpio_set; jzgc->gc.get = ingenic_gpio_get; diff --git a/drivers/gpio/gpio-loongson.c b/drivers/gpio/gpio-loongson.c index 92c4fe7b2677..16cfbe9e72fe 100644 --- a/drivers/gpio/gpio-loongson.c +++ b/drivers/gpio/gpio-loongson.c @@ -17,9 +17,11 @@ #include <linux/module.h> #include <linux/spinlock.h> #include <linux/err.h> +#include <linux/gpio/driver.h> +#include <linux/platform_device.h> +#include <linux/bitops.h> #include <asm/types.h> #include <loongson.h> -#include <linux/gpio.h> #define STLS2F_N_GPIO 4 #define STLS3A_N_GPIO 16 @@ -30,86 +32,108 @@ #define LOONGSON_N_GPIO STLS2F_N_GPIO #endif +/* + * Offset into the register where we read lines, we write them from offset 0. + * This offset is the only thing that stand between us and using + * GPIO_GENERIC. + */ #define LOONGSON_GPIO_IN_OFFSET 16 static DEFINE_SPINLOCK(gpio_lock); -static int loongson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) +static int loongson_gpio_get_value(struct gpio_chip *chip, unsigned gpio) { - u32 temp; - u32 mask; + u32 val; spin_lock(&gpio_lock); - mask = 1 << gpio; - temp = LOONGSON_GPIOIE; - temp |= mask; - LOONGSON_GPIOIE = temp; + val = LOONGSON_GPIODATA; spin_unlock(&gpio_lock); - return 0; + return !!(val & BIT(gpio + LOONGSON_GPIO_IN_OFFSET)); } -static int loongson_gpio_direction_output(struct gpio_chip *chip, - unsigned gpio, int level) +static void loongson_gpio_set_value(struct gpio_chip *chip, + unsigned gpio, int value) +{ + u32 val; + + spin_lock(&gpio_lock); + val = LOONGSON_GPIODATA; + if (value) + val |= BIT(gpio); + else + val &= ~BIT(gpio); + LOONGSON_GPIODATA = val; + spin_unlock(&gpio_lock); +} + +static int loongson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) { u32 temp; - u32 mask; - gpio_set_value(gpio, level); spin_lock(&gpio_lock); - mask = 1 << gpio; temp = LOONGSON_GPIOIE; - temp &= (~mask); + temp |= BIT(gpio); LOONGSON_GPIOIE = temp; spin_unlock(&gpio_lock); return 0; } -static int loongson_gpio_get_value(struct gpio_chip *chip, unsigned gpio) +static int loongson_gpio_direction_output(struct gpio_chip *chip, + unsigned gpio, int level) { - u32 val; - u32 mask; + u32 temp; - mask = 1 << (gpio + LOONGSON_GPIO_IN_OFFSET); + loongson_gpio_set_value(chip, gpio, level); spin_lock(&gpio_lock); - val = LOONGSON_GPIODATA; + temp = LOONGSON_GPIOIE; + temp &= ~BIT(gpio); + LOONGSON_GPIOIE = temp; spin_unlock(&gpio_lock); - return (val & mask) != 0; + return 0; } -static void loongson_gpio_set_value(struct gpio_chip *chip, - unsigned gpio, int value) +static int loongson_gpio_probe(struct platform_device *pdev) { - u32 val; - u32 mask; - - mask = 1 << gpio; - - spin_lock(&gpio_lock); - val = LOONGSON_GPIODATA; - if (value) - val |= mask; - else - val &= (~mask); - LOONGSON_GPIODATA = val; - spin_unlock(&gpio_lock); + struct gpio_chip *gc; + struct device *dev = &pdev->dev; + + gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL); + if (!gc) + return -ENOMEM; + + gc->label = "loongson-gpio-chip"; + gc->base = 0; + gc->ngpio = LOONGSON_N_GPIO; + gc->get = loongson_gpio_get_value; + gc->set = loongson_gpio_set_value; + gc->direction_input = loongson_gpio_direction_input; + gc->direction_output = loongson_gpio_direction_output; + + return gpiochip_add_data(gc, NULL); } -static struct gpio_chip loongson_chip = { - .label = "Loongson-gpio-chip", - .direction_input = loongson_gpio_direction_input, - .get = loongson_gpio_get_value, - .direction_output = loongson_gpio_direction_output, - .set = loongson_gpio_set_value, - .base = 0, - .ngpio = LOONGSON_N_GPIO, - .can_sleep = false, +static struct platform_driver loongson_gpio_driver = { + .driver = { + .name = "loongson-gpio", + }, + .probe = loongson_gpio_probe, }; static int __init loongson_gpio_setup(void) { - return gpiochip_add_data(&loongson_chip, NULL); + struct platform_device *pdev; + int ret; + + ret = platform_driver_register(&loongson_gpio_driver); + if (ret) { + pr_err("error registering loongson GPIO driver\n"); + return ret; + } + + pdev = platform_device_register_simple("loongson-gpio", -1, NULL, 0); + return PTR_ERR_OR_ZERO(pdev); } postcore_initcall(loongson_gpio_setup); diff --git a/drivers/gpio/gpio-lp3943.c b/drivers/gpio/gpio-lp3943.c index 6dc6725403ec..c3a3b9b7b553 100644 --- a/drivers/gpio/gpio-lp3943.c +++ b/drivers/gpio/gpio-lp3943.c @@ -12,7 +12,7 @@ #include <linux/bitops.h> #include <linux/err.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/i2c.h> #include <linux/mfd/lp3943.h> #include <linux/module.h> diff --git a/drivers/gpio/gpio-lp873x.c b/drivers/gpio/gpio-lp873x.c index df0ad2cef0d2..801995dd9b26 100644 --- a/drivers/gpio/gpio-lp873x.c +++ b/drivers/gpio/gpio-lp873x.c @@ -14,7 +14,7 @@ * Based on the TPS65218 driver */ -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regmap.h> diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c index 92b3ae2a6735..aa74cc4d8b14 100644 --- a/drivers/gpio/gpio-lpc32xx.c +++ b/drivers/gpio/gpio-lpc32xx.c @@ -20,9 +20,8 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/errno.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/of.h> -#include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/module.h> diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index 1e557b10d73e..b5b5e500e72c 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -25,7 +25,7 @@ #include <linux/types.h> #include <linux/bitops.h> #include <linux/interrupt.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/slab.h> #include <linux/acpi.h> #include <linux/platform_device.h> diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c index 946d09195598..198a36b07773 100644 --- a/drivers/gpio/gpio-max730x.c +++ b/drivers/gpio/gpio-max730x.c @@ -35,7 +35,7 @@ #include <linux/platform_device.h> #include <linux/mutex.h> #include <linux/spi/max7301.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/slab.h> /* diff --git a/drivers/gpio/gpio-mc33880.c b/drivers/gpio/gpio-mc33880.c index 0f0df7956264..18a5a58d634a 100644 --- a/drivers/gpio/gpio-mc33880.c +++ b/drivers/gpio/gpio-mc33880.c @@ -24,7 +24,7 @@ #include <linux/mutex.h> #include <linux/spi/spi.h> #include <linux/spi/mc33880.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/slab.h> #include <linux/module.h> diff --git a/drivers/gpio/gpio-mc9s08dz60.c b/drivers/gpio/gpio-mc9s08dz60.c index 2fcad5b9cca5..d8d846d2189a 100644 --- a/drivers/gpio/gpio-mc9s08dz60.c +++ b/drivers/gpio/gpio-mc9s08dz60.c @@ -18,7 +18,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #define GPIO_GROUP_NUM 2 #define GPIO_NUM_PER_GROUP 8 diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c index b3678bd1c120..e2bee27eb526 100644 --- a/drivers/gpio/gpio-ml-ioh.c +++ b/drivers/gpio/gpio-ml-ioh.c @@ -18,7 +18,7 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/pci.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/irq.h> diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c index b1cf76dd84ba..b0754fe69e77 100644 --- a/drivers/gpio/gpio-mm-lantiq.c +++ b/drivers/gpio/gpio-mm-lantiq.c @@ -11,7 +11,7 @@ #include <linux/types.h> #include <linux/platform_device.h> #include <linux/mutex.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/of.h> #include <linux/of_gpio.h> #include <linux/io.h> diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index 76c2fe91a901..d66b7a768ecd 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -1,15 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * GPIO Testing Device Driver * * Copyright (C) 2014 Kamlakant Patel <kamlakant.patel@broadcom.com> * Copyright (C) 2015-2016 Bamvor Jian Zhang <bamv2005@gmail.com> * Copyright (C) 2017 Bartosz Golaszewski <brgl@bgdev.pl> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * */ #include <linux/init.h> diff --git a/drivers/gpio/gpio-msic.c b/drivers/gpio/gpio-msic.c index 6cb67595d15f..3b34dbecef99 100644 --- a/drivers/gpio/gpio-msic.c +++ b/drivers/gpio/gpio-msic.c @@ -24,7 +24,7 @@ #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/init.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/platform_device.h> #include <linux/mfd/intel_msic.h> diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index 45c65f805fd6..6e02148c208b 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -36,7 +36,8 @@ #include <linux/bitops.h> #include <linux/clk.h> #include <linux/err.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> +#include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/io.h> #include <linux/irq.h> @@ -51,8 +52,6 @@ #include <linux/regmap.h> #include <linux/slab.h> -#include "gpiolib.h" - /* * GPIO unit register offsets. */ @@ -608,19 +607,16 @@ static int mvebu_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) if (mvpwm->gpiod) { ret = -EBUSY; } else { - desc = gpio_to_desc(mvchip->chip.base + pwm->hwpwm); - if (!desc) { - ret = -ENODEV; + desc = gpiochip_request_own_desc(&mvchip->chip, + pwm->hwpwm, "mvebu-pwm"); + if (IS_ERR(desc)) { + ret = PTR_ERR(desc); goto out; } - ret = gpiod_request(desc, "mvebu-pwm"); - if (ret) - goto out; - ret = gpiod_direction_output(desc, 0); if (ret) { - gpiod_free(desc); + gpiochip_free_own_desc(desc); goto out; } @@ -637,7 +633,7 @@ static void mvebu_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) unsigned long flags; spin_lock_irqsave(&mvpwm->lock, flags); - gpiod_free(mvpwm->gpiod); + gpiochip_free_own_desc(mvpwm->gpiod); mvpwm->gpiod = NULL; spin_unlock_irqrestore(&mvpwm->lock, flags); } diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 5245a2fe62ae..2f2829966d4c 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -1,25 +1,13 @@ -/* - * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de> - * Copyright 2008 Juergen Beisert, kernel@pengutronix.de - * - * Based on code from Freescale Semiconductor, - * Authors: Daniel Mack, Juergen Beisert. - * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - +// SPDX-License-Identifier: GPL-2.0+ +// +// MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de> +// Copyright 2008 Juergen Beisert, kernel@pengutronix.de +// +// Based on code from Freescale Semiconductor, +// Authors: Daniel Mack, Juergen Beisert. +// Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + +#include <linux/clk.h> #include <linux/err.h> #include <linux/init.h> #include <linux/interrupt.h> @@ -30,8 +18,6 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/gpio/driver.h> -/* FIXME: for gpio_get_value() replace this with direct register read */ -#include <linux/gpio.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/bug.h> @@ -62,6 +48,7 @@ struct mxc_gpio_hwdata { struct mxc_gpio_port { struct list_head node; void __iomem *base; + struct clk *clk; int irq; int irq_high; struct irq_domain *domain; @@ -174,7 +161,6 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type) struct mxc_gpio_port *port = gc->private; u32 bit, val; u32 gpio_idx = d->hwirq; - u32 gpio = port->gc.base + gpio_idx; int edge; void __iomem *reg = port->base; @@ -190,13 +176,13 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type) if (GPIO_EDGE_SEL >= 0) { edge = GPIO_INT_BOTH_EDGES; } else { - val = gpio_get_value(gpio); + val = port->gc.get(&port->gc, gpio_idx); if (val) { edge = GPIO_INT_LOW_LEV; - pr_debug("mxc: set GPIO %d to low trigger\n", gpio); + pr_debug("mxc: set GPIO %d to low trigger\n", gpio_idx); } else { edge = GPIO_INT_HIGH_LEV; - pr_debug("mxc: set GPIO %d to high trigger\n", gpio); + pr_debug("mxc: set GPIO %d to high trigger\n", gpio_idx); } port->both_edges |= 1 << gpio_idx; } @@ -437,6 +423,17 @@ static int mxc_gpio_probe(struct platform_device *pdev) if (port->irq < 0) return port->irq; + /* the controller clock is optional */ + port->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(port->clk)) + port->clk = NULL; + + err = clk_prepare_enable(port->clk); + if (err) { + dev_err(&pdev->dev, "Unable to enable clock.\n"); + return err; + } + /* disable the interrupt and clear the status */ writel(0, port->base + GPIO_IMR); writel(~0, port->base + GPIO_ISR); @@ -505,6 +502,7 @@ static int mxc_gpio_probe(struct platform_device *pdev) out_irqdomain_remove: irq_domain_remove(port->domain); out_bgio: + clk_disable_unprepare(port->clk); dev_info(&pdev->dev, "%s failed with errno %d\n", __func__, err); return err; } diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c index 435def22445d..e2831ee70cdc 100644 --- a/drivers/gpio/gpio-mxs.c +++ b/drivers/gpio/gpio-mxs.c @@ -1,24 +1,10 @@ -/* - * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de> - * Copyright 2008 Juergen Beisert, kernel@pengutronix.de - * - * Based on code from Freescale, - * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301, USA. - */ +// SPDX-License-Identifier: GPL-2.0+ +// +// MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de> +// Copyright 2008 Juergen Beisert, kernel@pengutronix.de +// +// Based on code from Freescale, +// Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. #include <linux/err.h> #include <linux/init.h> @@ -290,8 +276,6 @@ MODULE_DEVICE_TABLE(of, mxs_gpio_dt_ids); static int mxs_gpio_probe(struct platform_device *pdev) { - const struct of_device_id *of_id = - of_match_device(mxs_gpio_dt_ids, &pdev->dev); struct device_node *np = pdev->dev.of_node; struct device_node *parent; static void __iomem *base; @@ -306,7 +290,7 @@ static int mxs_gpio_probe(struct platform_device *pdev) port->id = of_alias_get_id(np, "gpio"); if (port->id < 0) return port->id; - port->devid = (enum mxs_gpio_id) of_id->data; + port->devid = (enum mxs_gpio_id)of_device_get_match_data(&pdev->dev); port->dev = &pdev->dev; port->irq = platform_get_irq(pdev, 0); if (port->irq < 0) diff --git a/drivers/gpio/gpio-octeon.c b/drivers/gpio/gpio-octeon.c index 96a8a8cb2729..1b19c88ea7bb 100644 --- a/drivers/gpio/gpio-octeon.c +++ b/drivers/gpio/gpio-octeon.c @@ -9,7 +9,7 @@ #include <linux/platform_device.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/io.h> #include <asm/octeon/octeon.h> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 35971a341c40..d1afedf4dcbf 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -24,7 +24,7 @@ #include <linux/pm.h> #include <linux/of.h> #include <linux/of_device.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/bitops.h> #include <linux/platform_data/gpio-omap.h> diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c index 3d818195e351..05b0cd5dcf11 100644 --- a/drivers/gpio/gpio-palmas.c +++ b/drivers/gpio/gpio-palmas.c @@ -18,7 +18,7 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/mfd/palmas.h> @@ -159,13 +159,9 @@ static int palmas_gpio_probe(struct platform_device *pdev) struct palmas_platform_data *palmas_pdata; struct palmas_gpio *palmas_gpio; int ret; - const struct of_device_id *match; const struct palmas_device_data *dev_data; - match = of_match_device(of_palmas_gpio_match, &pdev->dev); - if (!match) - return -ENODEV; - dev_data = match->data; + dev_data = of_device_get_match_data(&pdev->dev); if (!dev_data) dev_data = &palmas_dev_data; diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index d2ead4b1cf61..c55ad157e820 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -12,7 +12,7 @@ */ #include <linux/acpi.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/init.h> @@ -25,29 +25,44 @@ #include <asm/unaligned.h> -#define PCA953X_INPUT 0 -#define PCA953X_OUTPUT 1 -#define PCA953X_INVERT 2 -#define PCA953X_DIRECTION 3 +#define PCA953X_INPUT 0x00 +#define PCA953X_OUTPUT 0x01 +#define PCA953X_INVERT 0x02 +#define PCA953X_DIRECTION 0x03 #define REG_ADDR_AI 0x80 -#define PCA957X_IN 0 -#define PCA957X_INVRT 1 -#define PCA957X_BKEN 2 -#define PCA957X_PUPD 3 -#define PCA957X_CFG 4 -#define PCA957X_OUT 5 -#define PCA957X_MSK 6 -#define PCA957X_INTS 7 - -#define PCAL953X_IN_LATCH 34 -#define PCAL953X_INT_MASK 37 -#define PCAL953X_INT_STAT 38 +#define PCA957X_IN 0x00 +#define PCA957X_INVRT 0x01 +#define PCA957X_BKEN 0x02 +#define PCA957X_PUPD 0x03 +#define PCA957X_CFG 0x04 +#define PCA957X_OUT 0x05 +#define PCA957X_MSK 0x06 +#define PCA957X_INTS 0x07 + +#define PCAL953X_OUT_STRENGTH 0x20 +#define PCAL953X_IN_LATCH 0x22 +#define PCAL953X_PULL_EN 0x23 +#define PCAL953X_PULL_SEL 0x24 +#define PCAL953X_INT_MASK 0x25 +#define PCAL953X_INT_STAT 0x26 +#define PCAL953X_OUT_CONF 0x27 + +#define PCAL6524_INT_EDGE 0x28 +#define PCAL6524_INT_CLR 0x2a +#define PCAL6524_IN_STATUS 0x2b +#define PCAL6524_OUT_INDCONF 0x2c +#define PCAL6524_DEBOUNCE 0x2d #define PCA_GPIO_MASK 0x00FF + +#define PCAL_GPIO_MASK 0x1f +#define PCAL_PINCTRL_MASK 0xe0 + #define PCA_INT 0x0100 #define PCA_PCAL 0x0200 +#define PCA_LATCH_INT (PCA_PCAL | PCA_INT) #define PCA953X_TYPE 0x1000 #define PCA957X_TYPE 0x2000 #define PCA_TYPE_MASK 0xF000 @@ -207,9 +222,11 @@ static int pca957x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val) static int pca953x_write_regs_24(struct pca953x_chip *chip, int reg, u8 *val) { int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); + int addr = (reg & PCAL_GPIO_MASK) << bank_shift; + int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1; return i2c_smbus_write_i2c_block_data(chip->client, - (reg << bank_shift) | REG_ADDR_AI, + pinctrl | addr | REG_ADDR_AI, NBANK(chip), val); } @@ -249,9 +266,11 @@ static int pca953x_read_regs_16(struct pca953x_chip *chip, int reg, u8 *val) static int pca953x_read_regs_24(struct pca953x_chip *chip, int reg, u8 *val) { int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); + int addr = (reg & PCAL_GPIO_MASK) << bank_shift; + int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1; return i2c_smbus_read_i2c_block_data(chip->client, - (reg << bank_shift) | REG_ADDR_AI, + pinctrl | addr | REG_ADDR_AI, NBANK(chip), val); } @@ -522,6 +541,15 @@ static int pca953x_irq_set_type(struct irq_data *d, unsigned int type) return 0; } +static void pca953x_irq_shutdown(struct irq_data *d) +{ + struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + u8 mask = 1 << (d->hwirq % BANK_SZ); + + chip->irq_trig_raise[d->hwirq / BANK_SZ] &= ~mask; + chip->irq_trig_fall[d->hwirq / BANK_SZ] &= ~mask; +} + static struct irq_chip pca953x_irq_chip = { .name = "pca953x", .irq_mask = pca953x_irq_mask, @@ -529,6 +557,7 @@ static struct irq_chip pca953x_irq_chip = { .irq_bus_lock = pca953x_irq_bus_lock, .irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock, .irq_set_type = pca953x_irq_set_type, + .irq_shutdown = pca953x_irq_shutdown, }; static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending) @@ -810,13 +839,11 @@ static int pca953x_probe(struct i2c_client *client, chip->driver_data = i2c_id->driver_data; } else { const struct acpi_device_id *acpi_id; - const struct of_device_id *match; + struct device *dev = &client->dev; - match = of_match_device(pca953x_dt_ids, &client->dev); - if (match) { - chip->driver_data = (int)(uintptr_t)match->data; - } else { - acpi_id = acpi_match_device(pca953x_acpi_ids, &client->dev); + chip->driver_data = (uintptr_t)of_device_get_match_data(dev); + if (!chip->driver_data) { + acpi_id = acpi_match_device(pca953x_acpi_ids, dev); if (!acpi_id) { ret = -ENODEV; goto err_exit; @@ -936,8 +963,8 @@ static const struct of_device_id pca953x_dt_ids[] = { { .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), }, { .compatible = "nxp,pca9698", .data = OF_953X(40, 0), }, - { .compatible = "nxp,pcal6524", .data = OF_953X(24, PCA_INT), }, - { .compatible = "nxp,pcal9555a", .data = OF_953X(16, PCA_INT), }, + { .compatible = "nxp,pcal6524", .data = OF_953X(24, PCA_LATCH_INT), }, + { .compatible = "nxp,pcal9555a", .data = OF_953X(16, PCA_LATCH_INT), }, { .compatible = "maxim,max7310", .data = OF_953X( 8, 0), }, { .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), }, diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 38fbb420c6cd..adf72dda25a2 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -18,7 +18,7 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/i2c.h> #include <linux/platform_data/pcf857x.h> #include <linux/interrupt.h> diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index 68c6d0c5a6d1..ffce0ab912ed 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -17,7 +17,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/pci.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/slab.h> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c index b70974cb9ef1..2afd9de84a0d 100644 --- a/drivers/gpio/gpio-pl061.c +++ b/drivers/gpio/gpio-pl061.c @@ -20,7 +20,7 @@ #include <linux/irq.h> #include <linux/irqchip/chained_irq.h> #include <linux/bitops.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/device.h> #include <linux/amba/bus.h> #include <linux/slab.h> diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c index 66d68d991162..29e044ff4b17 100644 --- a/drivers/gpio/gpio-pmic-eic-sprd.c +++ b/drivers/gpio/gpio-pmic-eic-sprd.c @@ -178,6 +178,14 @@ static int sprd_pmic_eic_irq_set_type(struct irq_data *data, case IRQ_TYPE_LEVEL_LOW: pmic_eic->reg[REG_IEV] = 0; break; + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_EDGE_FALLING: + case IRQ_TYPE_EDGE_BOTH: + /* + * Will set the trigger level according to current EIC level + * in irq_bus_sync_unlock() interface, so here nothing to do. + */ + break; default: return -ENOTSUPP; } @@ -197,11 +205,22 @@ static void sprd_pmic_eic_bus_sync_unlock(struct irq_data *data) { struct gpio_chip *chip = irq_data_get_irq_chip_data(data); struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip); + u32 trigger = irqd_get_trigger_type(data); u32 offset = irqd_to_hwirq(data); + int state; /* Set irq type */ - sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, - pmic_eic->reg[REG_IEV]); + if (trigger & IRQ_TYPE_EDGE_BOTH) { + state = sprd_pmic_eic_get(chip, offset); + if (state) + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, 0); + else + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, 1); + } else { + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, + pmic_eic->reg[REG_IEV]); + } + /* Set irq unmask */ sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IE, pmic_eic->reg[REG_IE]); @@ -212,6 +231,35 @@ static void sprd_pmic_eic_bus_sync_unlock(struct irq_data *data) mutex_unlock(&pmic_eic->buslock); } +static void sprd_pmic_eic_toggle_trigger(struct gpio_chip *chip, + unsigned int irq, unsigned int offset) +{ + u32 trigger = irq_get_trigger_type(irq); + int state, post_state; + + if (!(trigger & IRQ_TYPE_EDGE_BOTH)) + return; + + state = sprd_pmic_eic_get(chip, offset); +retry: + if (state) + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, 0); + else + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, 1); + + post_state = sprd_pmic_eic_get(chip, offset); + if (state != post_state) { + dev_warn(chip->parent, "PMIC EIC level was changed.\n"); + state = post_state; + goto retry; + } + + /* Set irq unmask */ + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IE, 1); + /* Generate trigger start pulse for debounce EIC */ + sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_TRIG, 1); +} + static irqreturn_t sprd_pmic_eic_irq_handler(int irq, void *data) { struct sprd_pmic_eic *pmic_eic = data; @@ -233,6 +281,12 @@ static irqreturn_t sprd_pmic_eic_irq_handler(int irq, void *data) girq = irq_find_mapping(chip->irq.domain, n); handle_nested_irq(girq); + + /* + * The PMIC EIC can only support level trigger, so we can + * toggle the level trigger to emulate the edge trigger. + */ + sprd_pmic_eic_toggle_trigger(chip, girq, n); } return IRQ_HANDLED; diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c index f480fb896963..1e66f808051c 100644 --- a/drivers/gpio/gpio-pxa.c +++ b/drivers/gpio/gpio-pxa.c @@ -14,7 +14,7 @@ #include <linux/module.h> #include <linux/clk.h> #include <linux/err.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/gpio-pxa.h> #include <linux/init.h> #include <linux/interrupt.h> @@ -579,15 +579,9 @@ static int pxa_gpio_probe_dt(struct platform_device *pdev, struct pxa_gpio_chip *pchip) { int nr_gpios; - const struct of_device_id *of_id = - of_match_device(pxa_gpio_dt_ids, &pdev->dev); const struct pxa_gpio_id *gpio_id; - if (!of_id || !of_id->data) { - dev_err(&pdev->dev, "Failed to find gpio controller\n"); - return -EFAULT; - } - gpio_id = of_id->data; + gpio_id = of_device_get_match_data(&pdev->dev); gpio_type = gpio_id->type; nr_gpios = gpio_id->gpio_nums; diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index f8d7d1cd8488..8d6a5a7e612d 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -363,13 +363,15 @@ static struct irq_chip stmpe_gpio_irq_chip = { .irq_set_type = stmpe_gpio_irq_set_type, }; +#define MAX_GPIOS 24 + static irqreturn_t stmpe_gpio_irq(int irq, void *dev) { struct stmpe_gpio *stmpe_gpio = dev; struct stmpe *stmpe = stmpe_gpio->stmpe; u8 statmsbreg; int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8); - u8 status[num_banks]; + u8 status[DIV_ROUND_UP(MAX_GPIOS, 8)]; int ret; int i; @@ -434,6 +436,11 @@ static int stmpe_gpio_probe(struct platform_device *pdev) struct stmpe_gpio *stmpe_gpio; int ret, irq; + if (stmpe->num_gpios > MAX_GPIOS) { + dev_err(&pdev->dev, "Need to increase maximum GPIO number\n"); + return -EINVAL; + } + stmpe_gpio = kzalloc(sizeof(*stmpe_gpio), GFP_KERNEL); if (!stmpe_gpio) return -ENOMEM; diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c index 537cec7583fc..8b0a69c5ba88 100644 --- a/drivers/gpio/gpio-syscon.c +++ b/drivers/gpio/gpio-syscon.c @@ -182,20 +182,15 @@ MODULE_DEVICE_TABLE(of, syscon_gpio_ids); static int syscon_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - const struct of_device_id *of_id; struct syscon_gpio_priv *priv; struct device_node *np = dev->of_node; int ret; - of_id = of_match_device(syscon_gpio_ids, dev); - if (!of_id) - return -ENODEV; - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->data = of_id->data; + priv->data = of_device_get_match_data(dev); if (priv->data->compatible) { priv->syscon = syscon_regmap_lookup_by_compatible( @@ -205,6 +200,8 @@ static int syscon_gpio_probe(struct platform_device *pdev) } else { priv->syscon = syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev"); + if (IS_ERR(priv->syscon) && np->parent) + priv->syscon = syscon_node_to_regmap(np->parent); if (IS_ERR(priv->syscon)) return PTR_ERR(priv->syscon); diff --git a/drivers/gpio/gpio-ts4900.c b/drivers/gpio/gpio-ts4900.c index 5bd21725e604..1da8d0586329 100644 --- a/drivers/gpio/gpio-ts4900.c +++ b/drivers/gpio/gpio-ts4900.c @@ -128,15 +128,10 @@ MODULE_DEVICE_TABLE(of, ts4900_gpio_of_match_table); static int ts4900_gpio_probe(struct i2c_client *client, const struct i2c_device_id *id) { - const struct of_device_id *match; struct ts4900_gpio_priv *priv; u32 ngpio; int ret; - match = of_match_device(ts4900_gpio_of_match_table, &client->dev); - if (!match) - return -EINVAL; - if (of_property_read_u32(client->dev.of_node, "ngpios", &ngpio)) ngpio = DEFAULT_PIN_NUMBER; @@ -148,7 +143,7 @@ static int ts4900_gpio_probe(struct i2c_client *client, priv->gpio_chip.label = "ts4900-gpio"; priv->gpio_chip.ngpio = ngpio; priv->gpio_chip.parent = &client->dev; - priv->input_bit = (uintptr_t)match->data; + priv->input_bit = (uintptr_t)of_device_get_match_data(&client->dev); priv->regmap = devm_regmap_init_i2c(client, &ts4900_regmap_config); if (IS_ERR(priv->regmap)) { diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c index 4610cc2938ad..d4ad6d0e02a2 100644 --- a/drivers/gpio/gpio-vf610.c +++ b/drivers/gpio/gpio-vf610.c @@ -254,8 +254,6 @@ static struct irq_chip vf610_gpio_irq_chip = { static int vf610_gpio_probe(struct platform_device *pdev) { - const struct of_device_id *of_id = of_match_device(vf610_gpio_dt_ids, - &pdev->dev); struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct vf610_gpio_port *port; @@ -267,7 +265,7 @@ static int vf610_gpio_probe(struct platform_device *pdev) if (!port) return -ENOMEM; - port->sdata = of_id->data; + port->sdata = of_device_get_match_data(dev); iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); port->base = devm_ioremap_resource(dev, iores); if (IS_ERR(port->base)) diff --git a/drivers/gpio/gpio-xlp.c b/drivers/gpio/gpio-xlp.c index e74bd43a6974..8e4275eaa7d7 100644 --- a/drivers/gpio/gpio-xlp.c +++ b/drivers/gpio/gpio-xlp.c @@ -322,14 +322,7 @@ static int xlp_gpio_probe(struct platform_device *pdev) return irq; if (pdev->dev.of_node) { - const struct of_device_id *of_id; - - of_id = of_match_device(xlp_gpio_of_ids, &pdev->dev); - if (!of_id) { - dev_err(&pdev->dev, "Unable to match OF ID\n"); - return -ENODEV; - } - soc_type = (uintptr_t) of_id->data; + soc_type = (uintptr_t)of_device_get_match_data(&pdev->dev); } else { const struct acpi_device_id *acpi_id; diff --git a/drivers/gpio/gpio-xra1403.c b/drivers/gpio/gpio-xra1403.c index 8d4c8e99b251..8711a7907568 100644 --- a/drivers/gpio/gpio-xra1403.c +++ b/drivers/gpio/gpio-xra1403.c @@ -39,6 +39,7 @@ #define XRA_REIR 0x10 /* Input Rising Edge Interrupt Enable */ #define XRA_FEIR 0x12 /* Input Falling Edge Interrupt Enable */ #define XRA_IFR 0x14 /* Input Filter Enable/Disable */ +#define XRA_LAST 0x15 /* Bounds */ struct xra1403 { struct gpio_chip chip; @@ -50,7 +51,7 @@ static const struct regmap_config xra1403_regmap_cfg = { .pad_bits = 1, .val_bits = 8, - .max_register = XRA_IFR | 0x01, + .max_register = XRA_LAST, }; static unsigned int to_reg(unsigned int reg, unsigned int offset) @@ -126,21 +127,16 @@ static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip) { int reg; struct xra1403 *xra = gpiochip_get_data(chip); - int *value; + int value[XRA_LAST]; int i; unsigned int gcr; unsigned int gsr; - value = kmalloc_array(xra1403_regmap_cfg.max_register, sizeof(*value), - GFP_KERNEL); - if (!value) - return; - seq_puts(s, "xra reg:"); - for (reg = 0; reg <= xra1403_regmap_cfg.max_register; reg++) + for (reg = 0; reg <= XRA_LAST; reg++) seq_printf(s, " %2.2x", reg); seq_puts(s, "\n value:"); - for (reg = 0; reg < xra1403_regmap_cfg.max_register; reg++) { + for (reg = 0; reg < XRA_LAST; reg++) { regmap_read(xra->regmap, reg, &value[reg]); seq_printf(s, " %2.2x", value[reg]); } @@ -159,7 +155,6 @@ static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip) (gcr & BIT(i)) ? "in" : "out", (gsr & BIT(i)) ? "hi" : "lo"); } - kfree(value); } #else #define xra1403_dbg_show NULL diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 75ee877e5cd5..3f5fcdd5a429 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -665,10 +665,8 @@ static void zynq_gpio_restore_context(struct zynq_gpio *gpio) static int __maybe_unused zynq_gpio_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - int irq = platform_get_irq(pdev, 0); - struct irq_data *data = irq_get_irq_data(irq); - struct zynq_gpio *gpio = platform_get_drvdata(pdev); + struct zynq_gpio *gpio = dev_get_drvdata(dev); + struct irq_data *data = irq_get_irq_data(gpio->irq); if (!irqd_is_wakeup_set(data)) { zynq_gpio_save_context(gpio); @@ -680,10 +678,8 @@ static int __maybe_unused zynq_gpio_suspend(struct device *dev) static int __maybe_unused zynq_gpio_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - int irq = platform_get_irq(pdev, 0); - struct irq_data *data = irq_get_irq_data(irq); - struct zynq_gpio *gpio = platform_get_drvdata(pdev); + struct zynq_gpio *gpio = dev_get_drvdata(dev); + struct irq_data *data = irq_get_irq_data(gpio->irq); int ret; if (!irqd_is_wakeup_set(data)) { @@ -831,7 +827,7 @@ static int zynq_gpio_probe(struct platform_device *pdev) chip->free = zynq_gpio_free; chip->direction_input = zynq_gpio_dir_in; chip->direction_output = zynq_gpio_dir_out; - chip->base = -1; + chip->base = of_alias_get_id(pdev->dev.of_node, "gpio"); chip->ngpio = gpio->p_data->ngpio; /* Retrieve GPIO clock */ diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 586d15137c03..28d968088131 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -210,11 +210,8 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev, const char * if (!con_id) return ERR_PTR(-ENOENT); - for (i = 0; i < ARRAY_SIZE(whitelist); i++) - if (!strcmp(con_id, whitelist[i])) - break; - - if (i == ARRAY_SIZE(whitelist)) + i = match_string(whitelist, ARRAY_SIZE(whitelist), con_id); + if (i < 0) return ERR_PTR(-ENOENT); desc = of_get_named_gpiod_flags(np, con_id, 0, of_flags); diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 55d596f3035e..e11a3bb03820 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -61,6 +61,11 @@ static struct bus_type gpio_bus_type = { .name = "gpio", }; +/* + * Number of GPIOs to use for the fast path in set array + */ +#define FASTPATH_NGPIO CONFIG_GPIOLIB_FASTPATH_LIMIT + /* gpio_lock prevents conflicts during gpio_desc[] table updates. * While any GPIO is requested, its gpio_chip is not removable; * each GPIO's "requested" flag serves as a lock and refcount. @@ -71,6 +76,9 @@ static DEFINE_MUTEX(gpio_lookup_lock); static LIST_HEAD(gpio_lookup_list); LIST_HEAD(gpio_devices); +static DEFINE_MUTEX(gpio_machine_hogs_mutex); +static LIST_HEAD(gpio_machine_hogs); + static void gpiochip_free_hogs(struct gpio_chip *chip); static int gpiochip_add_irqchip(struct gpio_chip *gpiochip, struct lock_class_key *lock_key, @@ -450,12 +458,11 @@ static long linehandle_ioctl(struct file *filep, unsigned int cmd, vals[i] = !!ghd.values[i]; /* Reuse the array setting function */ - gpiod_set_array_value_complex(false, + return gpiod_set_array_value_complex(false, true, lh->numdescs, lh->descs, vals); - return 0; } return -EINVAL; } @@ -1172,6 +1179,41 @@ err_remove_device: return status; } +static void gpiochip_machine_hog(struct gpio_chip *chip, struct gpiod_hog *hog) +{ + struct gpio_desc *desc; + int rv; + + desc = gpiochip_get_desc(chip, hog->chip_hwnum); + if (IS_ERR(desc)) { + pr_err("%s: unable to get GPIO desc: %ld\n", + __func__, PTR_ERR(desc)); + return; + } + + if (test_bit(FLAG_IS_HOGGED, &desc->flags)) + return; + + rv = gpiod_hog(desc, hog->line_name, hog->lflags, hog->dflags); + if (rv) + pr_err("%s: unable to hog GPIO line (%s:%u): %d\n", + __func__, chip->label, hog->chip_hwnum, rv); +} + +static void machine_gpiochip_add(struct gpio_chip *chip) +{ + struct gpiod_hog *hog; + + mutex_lock(&gpio_machine_hogs_mutex); + + list_for_each_entry(hog, &gpio_machine_hogs, list) { + if (!strcmp(chip->label, hog->chip_label)) + gpiochip_machine_hog(chip, hog); + } + + mutex_unlock(&gpio_machine_hogs_mutex); +} + static void gpiochip_setup_devs(void) { struct gpio_device *gdev; @@ -1244,6 +1286,10 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data, goto err_free_descs; } + if (chip->ngpio > FASTPATH_NGPIO) + chip_warn(chip, "line cnt %u is greater than fast path cnt %u\n", + chip->ngpio, FASTPATH_NGPIO); + gdev->label = kstrdup_const(chip->label ?: "unknown", GFP_KERNEL); if (!gdev->label) { status = -ENOMEM; @@ -1327,6 +1373,8 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data, acpi_gpiochip_add(chip); + machine_gpiochip_add(chip); + /* * By first adding the chardev, and then adding the device, * we get a device node entry in sysfs under @@ -2078,6 +2126,11 @@ EXPORT_SYMBOL_GPL(gpiochip_generic_config); * @pctldev: the pin controller to map to * @gpio_offset: the start offset in the current gpio_chip number space * @pin_group: name of the pin group inside the pin controller + * + * Calling this function directly from a DeviceTree-supported + * pinctrl driver is DEPRECATED. Please see Section 2.1 of + * Documentation/devicetree/bindings/gpio/gpio.txt on how to + * bind pinctrl and gpio drivers via the "gpio-ranges" property. */ int gpiochip_add_pingroup_range(struct gpio_chip *chip, struct pinctrl_dev *pctldev, @@ -2131,6 +2184,11 @@ EXPORT_SYMBOL_GPL(gpiochip_add_pingroup_range); * * Returns: * 0 on success, or a negative error-code on failure. + * + * Calling this function directly from a DeviceTree-supported + * pinctrl driver is DEPRECATED. Please see Section 2.1 of + * Documentation/devicetree/bindings/gpio/gpio.txt on how to + * bind pinctrl and gpio drivers via the "gpio-ranges" property. */ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, unsigned int gpio_offset, unsigned int pin_offset, @@ -2719,16 +2777,28 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep, while (i < array_size) { struct gpio_chip *chip = desc_array[i]->gdev->chip; - unsigned long mask[BITS_TO_LONGS(chip->ngpio)]; - unsigned long bits[BITS_TO_LONGS(chip->ngpio)]; + unsigned long fastpath[2 * BITS_TO_LONGS(FASTPATH_NGPIO)]; + unsigned long *mask, *bits; int first, j, ret; + if (likely(chip->ngpio <= FASTPATH_NGPIO)) { + mask = fastpath; + } else { + mask = kmalloc_array(2 * BITS_TO_LONGS(chip->ngpio), + sizeof(*mask), + can_sleep ? GFP_KERNEL : GFP_ATOMIC); + if (!mask) + return -ENOMEM; + } + + bits = mask + BITS_TO_LONGS(chip->ngpio); + bitmap_zero(mask, chip->ngpio); + if (!can_sleep) WARN_ON(chip->can_sleep); /* collect all inputs belonging to the same chip */ first = i; - memset(mask, 0, sizeof(mask)); do { const struct gpio_desc *desc = desc_array[i]; int hwgpio = gpio_chip_hwgpio(desc); @@ -2739,8 +2809,11 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep, (desc_array[i]->gdev->chip == chip)); ret = gpio_chip_get_multiple(chip, mask, bits); - if (ret) + if (ret) { + if (mask != fastpath) + kfree(mask); return ret; + } for (j = first; j < i; j++) { const struct gpio_desc *desc = desc_array[j]; @@ -2752,6 +2825,9 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep, value_array[j] = value; trace_gpio_value(desc_to_gpio(desc), 1, value); } + + if (mask != fastpath) + kfree(mask); } return 0; } @@ -2935,7 +3011,7 @@ static void gpio_chip_set_multiple(struct gpio_chip *chip, } } -void gpiod_set_array_value_complex(bool raw, bool can_sleep, +int gpiod_set_array_value_complex(bool raw, bool can_sleep, unsigned int array_size, struct gpio_desc **desc_array, int *value_array) @@ -2944,14 +3020,26 @@ void gpiod_set_array_value_complex(bool raw, bool can_sleep, while (i < array_size) { struct gpio_chip *chip = desc_array[i]->gdev->chip; - unsigned long mask[BITS_TO_LONGS(chip->ngpio)]; - unsigned long bits[BITS_TO_LONGS(chip->ngpio)]; + unsigned long fastpath[2 * BITS_TO_LONGS(FASTPATH_NGPIO)]; + unsigned long *mask, *bits; int count = 0; + if (likely(chip->ngpio <= FASTPATH_NGPIO)) { + mask = fastpath; + } else { + mask = kmalloc_array(2 * BITS_TO_LONGS(chip->ngpio), + sizeof(*mask), + can_sleep ? GFP_KERNEL : GFP_ATOMIC); + if (!mask) + return -ENOMEM; + } + + bits = mask + BITS_TO_LONGS(chip->ngpio); + bitmap_zero(mask, chip->ngpio); + if (!can_sleep) WARN_ON(chip->can_sleep); - memset(mask, 0, sizeof(mask)); do { struct gpio_desc *desc = desc_array[i]; int hwgpio = gpio_chip_hwgpio(desc); @@ -2982,7 +3070,11 @@ void gpiod_set_array_value_complex(bool raw, bool can_sleep, /* push collected bits to outputs */ if (count != 0) gpio_chip_set_multiple(chip, mask, bits); + + if (mask != fastpath) + kfree(mask); } + return 0; } /** @@ -3057,13 +3149,13 @@ EXPORT_SYMBOL_GPL(gpiod_set_value); * This function should be called from contexts where we cannot sleep, and will * complain if the GPIO chip functions potentially sleep. */ -void gpiod_set_raw_array_value(unsigned int array_size, +int gpiod_set_raw_array_value(unsigned int array_size, struct gpio_desc **desc_array, int *value_array) { if (!desc_array) - return; - gpiod_set_array_value_complex(true, false, array_size, desc_array, - value_array); + return -EINVAL; + return gpiod_set_array_value_complex(true, false, array_size, + desc_array, value_array); } EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value); @@ -3383,14 +3475,14 @@ EXPORT_SYMBOL_GPL(gpiod_set_value_cansleep); * * This function is to be called from contexts that can sleep. */ -void gpiod_set_raw_array_value_cansleep(unsigned int array_size, +int gpiod_set_raw_array_value_cansleep(unsigned int array_size, struct gpio_desc **desc_array, int *value_array) { might_sleep_if(extra_checks); if (!desc_array) - return; - gpiod_set_array_value_complex(true, true, array_size, desc_array, + return -EINVAL; + return gpiod_set_array_value_complex(true, true, array_size, desc_array, value_array); } EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value_cansleep); @@ -3463,6 +3555,33 @@ void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) } EXPORT_SYMBOL_GPL(gpiod_remove_lookup_table); +/** + * gpiod_add_hogs() - register a set of GPIO hogs from machine code + * @hogs: table of gpio hog entries with a zeroed sentinel at the end + */ +void gpiod_add_hogs(struct gpiod_hog *hogs) +{ + struct gpio_chip *chip; + struct gpiod_hog *hog; + + mutex_lock(&gpio_machine_hogs_mutex); + + for (hog = &hogs[0]; hog->chip_label; hog++) { + list_add_tail(&hog->list, &gpio_machine_hogs); + + /* + * The chip may have been registered earlier, so check if it + * exists and, if so, try to hog the line now. + */ + chip = find_chip_by_name(hog->chip_label); + if (chip) + gpiochip_machine_hog(chip, hog); + } + + mutex_unlock(&gpio_machine_hogs_mutex); +} +EXPORT_SYMBOL_GPL(gpiod_add_hogs); + static struct gpiod_lookup_table *gpiod_find_lookup_table(struct device *dev) { const char *dev_id = dev ? dev_name(dev) : NULL; diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index ad456b6f9d8b..1a8e20363861 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -188,7 +188,7 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep, unsigned int array_size, struct gpio_desc **desc_array, int *value_array); -void gpiod_set_array_value_complex(bool raw, bool can_sleep, +int gpiod_set_array_value_complex(bool raw, bool can_sleep, unsigned int array_size, struct gpio_desc **desc_array, int *value_array); |