diff options
| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2006-09-18 23:23:07 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-09-25 10:25:47 +0100 |
| commit | 72edd84a6b2db1a21d1ed07929cae560e276a0a6 (patch) | |
| tree | b67000e2bbf7447968c784cc3696a680ad66c47e /arch | |
| parent | 610300e8f4f833904096ca1233ffd9dbd73fb11f (diff) | |
[ARM] 3827/1: iop3xx: add common gpio module
Implement the gpio_line_{config,get,set} API for iop3xx.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-iop/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/plat-iop/gpio.c | 48 |
2 files changed, 49 insertions, 1 deletions
diff --git a/arch/arm/plat-iop/Makefile b/arch/arm/plat-iop/Makefile index d20cdec3a94..23da00b1151 100644 --- a/arch/arm/plat-iop/Makefile +++ b/arch/arm/plat-iop/Makefile @@ -2,7 +2,7 @@ # Makefile for the linux kernel. # -obj-y := i2c.o pci.o setup.o time.o +obj-y := gpio.o i2c.o pci.o setup.o time.o obj-m := obj-n := obj- := diff --git a/arch/arm/plat-iop/gpio.c b/arch/arm/plat-iop/gpio.c new file mode 100644 index 00000000000..eda43608341 --- /dev/null +++ b/arch/arm/plat-iop/gpio.c @@ -0,0 +1,48 @@ +/* + * arch/arm/plat-iop/gpio.c + * GPIO handling for Intel IOP3xx processors. + * + * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> + * + * 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/device.h> +#include <asm/hardware/iop3xx.h> + +void gpio_line_config(int line, int direction) +{ + unsigned long flags; + + local_irq_save(flags); + if (direction == GPIO_IN) { + *IOP3XX_GPOE |= 1 << line; + } else if (direction == GPIO_OUT) { + *IOP3XX_GPOE &= ~(1 << line); + } + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_line_config); + +int gpio_line_get(int line) +{ + return !!(*IOP3XX_GPID & (1 << line)); +} +EXPORT_SYMBOL(gpio_line_get); + +void gpio_line_set(int line, int value) +{ + unsigned long flags; + + local_irq_save(flags); + if (value == GPIO_LOW) { + *IOP3XX_GPOD &= ~(1 << line); + } else if (value == GPIO_HIGH) { + *IOP3XX_GPOD |= 1 << line; + } + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_line_set); |