diff options
author | Dmitry Baryshkov <dbaryshkov@gmail.com> | 2008-04-10 12:31:47 (GMT) |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-04-10 14:31:37 (GMT) |
commit | 45528e38173e7d8c03821850e8fd1ddbf16f2b3d (patch) | |
tree | 96ed1a1e340bb28e47d8b4b9e1de4b42e0d12bd6 /arch/arm/mach-sa1100/gpio.c | |
parent | c353faa4b2abd8d5142640b880532c97a0807460 (diff) | |
download | linux-fsl-qoriq-45528e38173e7d8c03821850e8fd1ddbf16f2b3d.tar.xz |
[ARM] 4961/1: gpiolib support for SA-1100 architecture
This adds gpiolib support for the SA-1100 arch:
- Move all GPIO API functions from generic.c into gpio.c
- Convert all gpio functions into gpiolib callbacks.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100/gpio.c')
-rw-r--r-- | arch/arm/mach-sa1100/gpio.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/gpio.c b/arch/arm/mach-sa1100/gpio.c new file mode 100644 index 0000000..372f1f4 --- /dev/null +++ b/arch/arm/mach-sa1100/gpio.c @@ -0,0 +1,65 @@ +/* + * linux/arch/arm/mach-sa1100/gpio.c + * + * Generic SA-1100 GPIO handling + * + * 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/init.h> +#include <linux/module.h> + +#include <asm/gpio.h> +#include <asm/hardware.h> +#include "generic.h" + +static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + return GPLR & GPIO_GPIO(offset); +} + +static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + if (value) + GPSR = GPIO_GPIO(offset); + else + GPCR = GPIO_GPIO(offset); +} + +static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset) +{ + unsigned long flags; + + local_irq_save(flags); + GPDR &= ~GPIO_GPIO(offset); + local_irq_restore(flags); + return 0; +} + +static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value) +{ + unsigned long flags; + + local_irq_save(flags); + sa1100_gpio_set(chip, offset, value); + GPDR |= GPIO_GPIO(offset); + local_irq_restore(flags); + return 0; +} + +static struct gpio_chip sa1100_gpio_chip = { + .label = "gpio", + .direction_input = sa1100_direction_input, + .direction_output = sa1100_direction_output, + .set = sa1100_gpio_set, + .get = sa1100_gpio_get, + .base = 0, + .ngpio = GPIO_MAX + 1, +}; + +void __init sa1100_init_gpio(void) +{ + gpiochip_add(&sa1100_gpio_chip); +} |