diff options
Diffstat (limited to 'arch/blackfin/mach-bf538/ext-gpio.c')
| -rw-r--r-- | arch/blackfin/mach-bf538/ext-gpio.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/arch/blackfin/mach-bf538/ext-gpio.c b/arch/blackfin/mach-bf538/ext-gpio.c deleted file mode 100644 index 48c100228f2d..000000000000 --- a/arch/blackfin/mach-bf538/ext-gpio.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * GPIOLIB interface for BF538/9 PORT C, D, and E GPIOs - * - * Copyright 2009-2011 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/module.h> -#include <linux/err.h> -#include <linux/gpio.h> -#include <asm/blackfin.h> -#include <asm/portmux.h> - -#define DEFINE_REG(reg, off) \ -static inline u16 read_##reg(void __iomem *port) \ - { return bfin_read16(port + off); } \ -static inline void write_##reg(void __iomem *port, u16 v) \ - { bfin_write16(port + off, v); } - -DEFINE_REG(PORTIO, 0x00) -DEFINE_REG(PORTIO_CLEAR, 0x10) -DEFINE_REG(PORTIO_SET, 0x20) -DEFINE_REG(PORTIO_DIR, 0x40) -DEFINE_REG(PORTIO_INEN, 0x50) - -static void __iomem *gpio_chip_to_mmr(struct gpio_chip *chip) -{ - switch (chip->base) { - default: /* not really needed, but keeps gcc happy */ - case GPIO_PC0: return (void __iomem *)PORTCIO; - case GPIO_PD0: return (void __iomem *)PORTDIO; - case GPIO_PE0: return (void __iomem *)PORTEIO; - } -} - -static int bf538_gpio_get_value(struct gpio_chip *chip, unsigned gpio) -{ - void __iomem *port = gpio_chip_to_mmr(chip); - return !!(read_PORTIO(port) & (1u << gpio)); -} - -static void bf538_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value) -{ - void __iomem *port = gpio_chip_to_mmr(chip); - if (value) - write_PORTIO_SET(port, (1u << gpio)); - else - write_PORTIO_CLEAR(port, (1u << gpio)); -} - -static int bf538_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) -{ - void __iomem *port = gpio_chip_to_mmr(chip); - write_PORTIO_DIR(port, read_PORTIO_DIR(port) & ~(1u << gpio)); - write_PORTIO_INEN(port, read_PORTIO_INEN(port) | (1u << gpio)); - return 0; -} - -static int bf538_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value) -{ - void __iomem *port = gpio_chip_to_mmr(chip); - write_PORTIO_INEN(port, read_PORTIO_INEN(port) & ~(1u << gpio)); - bf538_gpio_set_value(port, gpio, value); - write_PORTIO_DIR(port, read_PORTIO_DIR(port) | (1u << gpio)); - return 0; -} - -static int bf538_gpio_request(struct gpio_chip *chip, unsigned gpio) -{ - return bfin_special_gpio_request(chip->base + gpio, chip->label); -} - -static void bf538_gpio_free(struct gpio_chip *chip, unsigned gpio) -{ - return bfin_special_gpio_free(chip->base + gpio); -} - -/* We don't set the irq fields as these banks cannot generate interrupts */ - -static struct gpio_chip bf538_portc_chip = { - .label = "GPIO-PC", - .direction_input = bf538_gpio_direction_input, - .get = bf538_gpio_get_value, - .direction_output = bf538_gpio_direction_output, - .set = bf538_gpio_set_value, - .request = bf538_gpio_request, - .free = bf538_gpio_free, - .base = GPIO_PC0, - .ngpio = GPIO_PC9 - GPIO_PC0 + 1, -}; - -static struct gpio_chip bf538_portd_chip = { - .label = "GPIO-PD", - .direction_input = bf538_gpio_direction_input, - .get = bf538_gpio_get_value, - .direction_output = bf538_gpio_direction_output, - .set = bf538_gpio_set_value, - .request = bf538_gpio_request, - .free = bf538_gpio_free, - .base = GPIO_PD0, - .ngpio = GPIO_PD13 - GPIO_PD0 + 1, -}; - -static struct gpio_chip bf538_porte_chip = { - .label = "GPIO-PE", - .direction_input = bf538_gpio_direction_input, - .get = bf538_gpio_get_value, - .direction_output = bf538_gpio_direction_output, - .set = bf538_gpio_set_value, - .request = bf538_gpio_request, - .free = bf538_gpio_free, - .base = GPIO_PE0, - .ngpio = GPIO_PE15 - GPIO_PE0 + 1, -}; - -static int __init bf538_extgpio_setup(void) -{ - return gpiochip_add_data(&bf538_portc_chip, NULL) | - gpiochip_add_data(&bf538_portd_chip, NULL) | - gpiochip_add_data(&bf538_porte_chip, NULL); -} -arch_initcall(bf538_extgpio_setup); - -#ifdef CONFIG_PM -static struct { - u16 data, dir, inen; -} gpio_bank_saved[3]; - -static void __iomem * const port_bases[3] = { - (void *)PORTCIO, - (void *)PORTDIO, - (void *)PORTEIO, -}; - -void bfin_special_gpio_pm_hibernate_suspend(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(port_bases); ++i) { - gpio_bank_saved[i].data = read_PORTIO(port_bases[i]); - gpio_bank_saved[i].inen = read_PORTIO_INEN(port_bases[i]); - gpio_bank_saved[i].dir = read_PORTIO_DIR(port_bases[i]); - } -} - -void bfin_special_gpio_pm_hibernate_restore(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(port_bases); ++i) { - write_PORTIO_INEN(port_bases[i], gpio_bank_saved[i].inen); - write_PORTIO_SET(port_bases[i], - gpio_bank_saved[i].data & gpio_bank_saved[i].dir); - write_PORTIO_DIR(port_bases[i], gpio_bank_saved[i].dir); - } -} -#endif |