diff options
| -rw-r--r-- | arch/arm/mach-ixp4xx/common.c | 23 | ||||
| -rw-r--r-- | include/asm-arm/arch-ixp4xx/gpio.h | 73 |
2 files changed, 96 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index 45068c3..39f2eeb 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -102,6 +102,29 @@ static signed char irq2gpio[32] = { 7, 8, 9, 10, 11, 12, -1, -1, }; +int gpio_to_irq(int gpio) +{ + int irq; + + for (irq = 0; irq < 32; irq++) { + if (irq2gpio[irq] == gpio) + return irq; + } + return -EINVAL; +} +EXPORT_SYMBOL(gpio_to_irq); + +int irq_to_gpio(int irq) +{ + int gpio = (irq < 32) ? irq2gpio[irq] : -EINVAL; + + if (gpio == -1) + return -EINVAL; + + return gpio; +} +EXPORT_SYMBOL(irq_to_gpio); + static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type) { int line = irq2gpio[irq]; diff --git a/include/asm-arm/arch-ixp4xx/gpio.h b/include/asm-arm/arch-ixp4xx/gpio.h new file mode 100644 index 0000000..3a4c5b8 --- /dev/null +++ b/include/asm-arm/arch-ixp4xx/gpio.h @@ -0,0 +1,73 @@ +/* + * linux/include/asm-arm/arch-ixp4xx/gpio.h + * + * IXP4XX GPIO wrappers for arch-neutral GPIO calls + * + * Written by Milan Svoboda <msvoboda@ra.rockwell.com> + * Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com> + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef __ASM_ARCH_IXP4XX_GPIO_H +#define __ASM_ARCH_IXP4XX_GPIO_H + +#include <asm/hardware.h> + +static inline int gpio_request(unsigned gpio, const char *label) +{ + return 0; +} + +static inline void gpio_free(unsigned gpio) +{ + return; +} + +static inline int gpio_direction_input(unsigned gpio) +{ + gpio_line_config(gpio, IXP4XX_GPIO_IN); + return 0; +} + +static inline int gpio_direction_output(unsigned gpio, int level) +{ + gpio_line_set(gpio, level); + gpio_line_config(gpio, IXP4XX_GPIO_OUT); + return 0; +} + +static inline int gpio_get_value(unsigned gpio) +{ + int value; + + gpio_line_get(gpio, &value); + + return value; +} + +static inline void gpio_set_value(unsigned gpio, int value) +{ + gpio_line_set(gpio, value); +} + +#include <asm-generic/gpio.h> /* cansleep wrappers */ + +extern int gpio_to_irq(int gpio); +extern int irq_to_gpio(int gpio); + +#endif + |