diff options
author | Erik Gilling <konkers@android.com> | 2010-03-15 19:40:06 -0700 |
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committer | Erik Gilling <konkers@android.com> | 2010-08-05 14:57:02 -0700 |
commit | 3c92db9ac0ca3eee8e46e2424b6c074e2e394ad9 (patch) | |
tree | 91bce4b3fa4cd34e415476a903d71dd759f9d598 /arch/arm/mach-tegra/include | |
parent | 2d5cd9a38b3792426115adbedce539bd45ee640e (diff) | |
download | linux-3c92db9ac0ca3eee8e46e2424b6c074e2e394ad9.tar.bz2 |
[ARM] tegra: add GPIO support
v2: fixes from Mike Rapoport:
- move gpio-names.h to arch/arm/mach-tegra
fixes from Russell King
- include linux/io.h and linux/gpio.h instead of asm/io.h
and asm/gpio.h
additional changes:
- add macros to convert between irq and gpio numbers for platform data
- change for_each_bit to for_each_set_bit in gpio.c
v3:
- minor bugfixes
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Erik Gilling <konkers@android.com>
Diffstat (limited to 'arch/arm/mach-tegra/include')
-rw-r--r-- | arch/arm/mach-tegra/include/mach/gpio.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/include/mach/gpio.h b/arch/arm/mach-tegra/include/mach/gpio.h new file mode 100644 index 000000000000..540e822e50f7 --- /dev/null +++ b/arch/arm/mach-tegra/include/mach/gpio.h @@ -0,0 +1,53 @@ +/* + * arch/arm/mach-tegra/include/mach/gpio.h + * + * Copyright (C) 2010 Google, Inc. + * + * Author: + * Erik Gilling <konkers@google.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __MACH_TEGRA_GPIO_H +#define __MACH_TEGRA_GPIO_H + +#include <mach/irqs.h> + +#define ARCH_NR_GPIOS INT_GPIO_NR + +#include <asm-generic/gpio.h> + +#define gpio_get_value __gpio_get_value +#define gpio_set_value __gpio_set_value +#define gpio_cansleep __gpio_cansleep + +#define TEGRA_GPIO_TO_IRQ(gpio) (INT_GPIO_BASE + (gpio)) +#define TEGRA_IRQ_TO_GPIO(irq) ((gpio) - INT_GPIO_BASE) + +static inline int gpio_to_irq(unsigned int gpio) +{ + if (gpio < ARCH_NR_GPIOS) + return INT_GPIO_BASE + gpio; + return -EINVAL; +} + +static inline int irq_to_gpio(unsigned int irq) +{ + if ((irq >= INT_GPIO_BASE) && (irq < INT_GPIO_BASE + INT_GPIO_NR)) + return irq - INT_GPIO_BASE; + return -EINVAL; +} + +void tegra_gpio_enable(int gpio); +void tegra_gpio_disable(int gpio); + +#endif |