diff options
author | Philipp Zabel <philipp.zabel@gmail.com> | 2007-02-12 00:53:14 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 09:48:34 -0800 |
commit | 8a898f1c366c858f8dbcb667c1cfcc282b727795 (patch) | |
tree | 113a793365336c12272b4822e5ff819b175b9f6f /include/asm-arm/arch-pxa/gpio.h | |
parent | a31c4eea2127ee52b5c7c1befada4664963ad030 (diff) |
[PATCH] PXA GPIO wrappers
Arch-neutral GPIO calls for PXA.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-arm/arch-pxa/gpio.h')
-rw-r--r-- | include/asm-arm/arch-pxa/gpio.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/asm-arm/arch-pxa/gpio.h b/include/asm-arm/arch-pxa/gpio.h new file mode 100644 index 00000000000..e67c2382101 --- /dev/null +++ b/include/asm-arm/arch-pxa/gpio.h @@ -0,0 +1,72 @@ +/* + * linux/include/asm-arm/arch-pxa/gpio.h + * + * PXA GPIO wrappers for arch-neutral GPIO calls + * + * Written 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_PXA_GPIO_H +#define __ASM_ARCH_PXA_GPIO_H + +#include <asm/arch/pxa-regs.h> +#include <asm/arch/irqs.h> +#include <asm/arch/hardware.h> + +#include <asm/errno.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) +{ + if (gpio > PXA_LAST_GPIO) + return -EINVAL; + pxa_gpio_mode(gpio | GPIO_IN); +} + +static inline int gpio_direction_output(unsigned gpio) +{ + if (gpio > PXA_LAST_GPIO) + return -EINVAL; + pxa_gpio_mode(gpio | GPIO_OUT); +} + +/* REVISIT these macros are correct, but suffer code explosion + * for non-constant parameters. Provide out-line versions too. + */ +#define gpio_get_value(gpio) \ + (GPLR(gpio) & GPIO_bit(gpio)) + +#define gpio_set_value(gpio,value) \ + ((value) ? (GPSR(gpio) = GPIO_bit(gpio)):(GPCR(gpio) = GPIO_bit(gpio))) + +#include <asm-generic/gpio.h> /* cansleep wrappers */ + +#define gpio_to_irq(gpio) IRQ_GPIO(gpio) +#define irq_to_gpio(irq) IRQ_TO_GPIO(irq) + + +#endif |