projects / linux.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 | */ | |
| 2f8163ba | 10 | #include <linux/gpio.h> |
| 45528e38 DB |
11 | #include <linux/init.h> |
| 12 | #include <linux/module.h> | |
| 13 | ||
| a09e64fb | 14 | #include <mach/hardware.h> |
| f314f33b | 15 | #include <mach/irqs.h> |
| 45528e38 DB |
16 | |
| 17 | static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset) | |
| 18 | { | |
| 19 | return GPLR & GPIO_GPIO(offset); | |
| 20 | } | |
| 21 | ||
| 22 | static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
| 23 | { | |
| 24 | if (value) | |
| 25 | GPSR = GPIO_GPIO(offset); | |
| 26 | else | |
| 27 | GPCR = GPIO_GPIO(offset); | |
| 28 | } | |
| 29 | ||
| 30 | static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset) | |
| 31 | { | |
| 32 | unsigned long flags; | |
| 33 | ||
| 34 | local_irq_save(flags); | |
| 35 | GPDR &= ~GPIO_GPIO(offset); | |
| 36 | local_irq_restore(flags); | |
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| 40 | static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value) | |
| 41 | { | |
| 42 | unsigned long flags; | |
| 43 | ||
| 44 | local_irq_save(flags); | |
| 45 | sa1100_gpio_set(chip, offset, value); | |
| 46 | GPDR |= GPIO_GPIO(offset); | |
| 47 | local_irq_restore(flags); | |
| 48 | return 0; | |
| 49 | } | |
| 50 | ||
| f408c985 RK |
51 | static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset) |
| 52 | { | |
| 53 | return offset < 11 ? (IRQ_GPIO0 + offset) : (IRQ_GPIO11 - 11 + offset); | |
| 54 | } | |
| 55 | ||
| 45528e38 DB |
56 | static struct gpio_chip sa1100_gpio_chip = { |
| 57 | .label = "gpio", | |
| 58 | .direction_input = sa1100_direction_input, | |
| 59 | .direction_output = sa1100_direction_output, | |
| 60 | .set = sa1100_gpio_set, | |
| 61 | .get = sa1100_gpio_get, | |
| f408c985 | 62 | .to_irq = sa1100_to_irq, |
| 45528e38 DB |
63 | .base = 0, |
| 64 | .ngpio = GPIO_MAX + 1, | |
| 65 | }; | |
| 66 | ||
| 67 | void __init sa1100_init_gpio(void) | |
| 68 | { | |
| 69 | gpiochip_add(&sa1100_gpio_chip); | |
| 70 | } |