| Philipp Zabel | 8a898f1 | 2007-02-12 00:53:14 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-pxa/gpio.h |
| 3 | * |
| 4 | * PXA GPIO wrappers for arch-neutral GPIO calls |
| 5 | * |
| 6 | * Written by Philipp Zabel <philipp.zabel@gmail.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #ifndef __ASM_ARCH_PXA_GPIO_H |
| 25 | #define __ASM_ARCH_PXA_GPIO_H |
| 26 | |
| 27 | #include <asm/arch/pxa-regs.h> |
| 28 | #include <asm/arch/irqs.h> |
| 29 | #include <asm/arch/hardware.h> |
| 30 | |
| 31 | #include <asm/errno.h> |
| 32 | |
| 33 | static inline int gpio_request(unsigned gpio, const char *label) |
| 34 | { |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | static inline void gpio_free(unsigned gpio) |
| 39 | { |
| 40 | return; |
| 41 | } |
| 42 | |
| 43 | static inline int gpio_direction_input(unsigned gpio) |
| 44 | { |
| 45 | if (gpio > PXA_LAST_GPIO) |
| 46 | return -EINVAL; |
| 47 | pxa_gpio_mode(gpio | GPIO_IN); |
| 48 | } |
| 49 | |
| 50 | static inline int gpio_direction_output(unsigned gpio) |
| 51 | { |
| 52 | if (gpio > PXA_LAST_GPIO) |
| 53 | return -EINVAL; |
| 54 | pxa_gpio_mode(gpio | GPIO_OUT); |
| 55 | } |
| 56 | |
| 57 | /* REVISIT these macros are correct, but suffer code explosion |
| 58 | * for non-constant parameters. Provide out-line versions too. |
| 59 | */ |
| 60 | #define gpio_get_value(gpio) \ |
| 61 | (GPLR(gpio) & GPIO_bit(gpio)) |
| 62 | |
| 63 | #define gpio_set_value(gpio,value) \ |
| 64 | ((value) ? (GPSR(gpio) = GPIO_bit(gpio)):(GPCR(gpio) = GPIO_bit(gpio))) |
| 65 | |
| 66 | #include <asm-generic/gpio.h> /* cansleep wrappers */ |
| 67 | |
| 68 | #define gpio_to_irq(gpio) IRQ_GPIO(gpio) |
| 69 | #define irq_to_gpio(irq) IRQ_TO_GPIO(irq) |
| 70 | |
| 71 | |
| 72 | #endif |