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https://github.com/torvalds/linux
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72edd84a6b
Implement the gpio_line_{config,get,set} API for iop3xx.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/*
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* arch/arm/plat-iop/gpio.c
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* GPIO handling for Intel IOP3xx processors.
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*
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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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 (at
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* your option) any later version.
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*/
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#include <linux/device.h>
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#include <asm/hardware/iop3xx.h>
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void gpio_line_config(int line, int direction)
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{
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unsigned long flags;
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local_irq_save(flags);
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if (direction == GPIO_IN) {
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*IOP3XX_GPOE |= 1 << line;
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} else if (direction == GPIO_OUT) {
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*IOP3XX_GPOE &= ~(1 << line);
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}
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local_irq_restore(flags);
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}
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EXPORT_SYMBOL(gpio_line_config);
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int gpio_line_get(int line)
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{
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return !!(*IOP3XX_GPID & (1 << line));
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}
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EXPORT_SYMBOL(gpio_line_get);
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void gpio_line_set(int line, int value)
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{
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unsigned long flags;
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local_irq_save(flags);
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if (value == GPIO_LOW) {
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*IOP3XX_GPOD &= ~(1 << line);
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} else if (value == GPIO_HIGH) {
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*IOP3XX_GPOD |= 1 << line;
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}
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local_irq_restore(flags);
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}
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EXPORT_SYMBOL(gpio_line_set);
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