9c6568501c
According to the documentation gpio_free should only be called from task context only. To make this more explicit add a might sleep to all implementations. This patch changes the gpio_free implementations for the arm architecture. DaVinci is skipped on purpose to simplify the merge process for patches switching it over to use gpiolib as per request by David Brownell. Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de> Cc: David Brownell <david-b@pacbell.net> Cc: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
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* arch/arm/mach-ixp4xx/include/mach/gpio.h
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*
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* IXP4XX GPIO wrappers for arch-neutral GPIO calls
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*
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* Written by Milan Svoboda <msvoboda@ra.rockwell.com>
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* Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __ASM_ARCH_IXP4XX_GPIO_H
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#define __ASM_ARCH_IXP4XX_GPIO_H
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#include <linux/kernel.h>
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#include <mach/hardware.h>
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static inline int gpio_request(unsigned gpio, const char *label)
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{
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return 0;
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}
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static inline void gpio_free(unsigned gpio)
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{
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might_sleep();
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return;
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}
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static inline int gpio_direction_input(unsigned gpio)
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{
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gpio_line_config(gpio, IXP4XX_GPIO_IN);
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return 0;
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}
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static inline int gpio_direction_output(unsigned gpio, int level)
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{
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gpio_line_set(gpio, level);
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gpio_line_config(gpio, IXP4XX_GPIO_OUT);
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return 0;
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}
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static inline int gpio_get_value(unsigned gpio)
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{
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int value;
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gpio_line_get(gpio, &value);
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return value;
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}
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static inline void gpio_set_value(unsigned gpio, int value)
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{
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gpio_line_set(gpio, value);
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}
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#include <asm-generic/gpio.h> /* cansleep wrappers */
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extern int gpio_to_irq(int gpio);
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extern int irq_to_gpio(int gpio);
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#endif
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