projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 45528e38 DB |
1 | /* |
| 2 | * linux/arch/arm/mach-sa1100/gpio.c | |
| 3 | * | |
| 4 | * Generic SA-1100 GPIO handling | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/init.h> | |
| 12 | #include <linux/module.h> | |
| 13 | ||
| 14 | #include <asm/gpio.h> | |
| a09e64fb | 15 | #include <mach/hardware.h> |
| 45528e38 DB |
16 | #include "generic.h" |
| 17 | ||
| 18 | static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset) | |
| 19 | { | |
| 20 | return GPLR & GPIO_GPIO(offset); | |
| 21 | } | |
| 22 | ||
| 23 | static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
| 24 | { | |
| 25 | if (value) | |
| 26 | GPSR = GPIO_GPIO(offset); | |
| 27 | else | |
| 28 | GPCR = GPIO_GPIO(offset); | |
| 29 | } | |
| 30 | ||
| 31 | static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset) | |
| 32 | { | |
| 33 | unsigned long flags; | |
| 34 | ||
| 35 | local_irq_save(flags); | |
| 36 | GPDR &= ~GPIO_GPIO(offset); | |
| 37 | local_irq_restore(flags); | |
| 38 | return 0; | |
| 39 | } | |
| 40 | ||
| 41 | static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value) | |
| 42 | { | |
| 43 | unsigned long flags; | |
| 44 | ||
| 45 | local_irq_save(flags); | |
| 46 | sa1100_gpio_set(chip, offset, value); | |
| 47 | GPDR |= GPIO_GPIO(offset); | |
| 48 | local_irq_restore(flags); | |
| 49 | return 0; | |
| 50 | } | |
| 51 | ||
| 52 | static struct gpio_chip sa1100_gpio_chip = { | |
| 53 | .label = "gpio", | |
| 54 | .direction_input = sa1100_direction_input, | |
| 55 | .direction_output = sa1100_direction_output, | |
| 56 | .set = sa1100_gpio_set, | |
| 57 | .get = sa1100_gpio_get, | |
| 58 | .base = 0, | |
| 59 | .ngpio = GPIO_MAX + 1, | |
| 60 | }; | |
| 61 | ||
| 62 | void __init sa1100_init_gpio(void) | |
| 63 | { | |
| 64 | gpiochip_add(&sa1100_gpio_chip); | |
| 65 | } |