2 * linux/include/asm-arm/arch-pxa/gpio.h
4 * PXA GPIO wrappers for arch-neutral GPIO calls
6 * Written by Philipp Zabel <philipp.zabel@gmail.com>
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.
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.
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
24 #ifndef __ASM_ARCH_PXA_GPIO_H
25 #define __ASM_ARCH_PXA_GPIO_H
27 #include <asm/arch/pxa-regs.h>
28 #include <asm/arch/irqs.h>
29 #include <asm/arch/hardware.h>
31 #include <asm/errno.h>
33 static inline int gpio_request(unsigned gpio, const char *label)
38 static inline void gpio_free(unsigned gpio)
43 static inline int gpio_direction_input(unsigned gpio)
45 if (gpio > PXA_LAST_GPIO)
47 pxa_gpio_mode(gpio | GPIO_IN);
50 static inline int gpio_direction_output(unsigned gpio)
52 if (gpio > PXA_LAST_GPIO)
54 pxa_gpio_mode(gpio | GPIO_OUT);
57 /* REVISIT these macros are correct, but suffer code explosion
58 * for non-constant parameters. Provide out-line versions too.
60 #define gpio_get_value(gpio) \
61 (GPLR(gpio) & GPIO_bit(gpio))
63 #define gpio_set_value(gpio,value) \
64 ((value) ? (GPSR(gpio) = GPIO_bit(gpio)):(GPCR(gpio) = GPIO_bit(gpio)))
66 #include <asm-generic/gpio.h> /* cansleep wrappers */
68 #define gpio_to_irq(gpio) IRQ_GPIO(gpio)
69 #define irq_to_gpio(irq) IRQ_TO_GPIO(irq)