2010-02-10 19:10:55 +08:00
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/*
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* Generic GPIO API and pinmux table support
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*
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* Copyright (c) 2008 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef __ASM_ARCH_GPIO_H
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#define __ASM_ARCH_GPIO_H
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#include <linux/kernel.h>
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#include <linux/errno.h>
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2012-06-25 18:41:09 +08:00
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#include <linux/io.h>
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2010-02-10 19:10:55 +08:00
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2012-06-25 18:41:09 +08:00
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/*
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* FIXME !!
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*
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* current gpio frame work doesn't have
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* the method to control only pull up/down/free.
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* this function should be replaced by correct gpio function
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*/
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2012-09-15 04:08:08 +08:00
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static inline void __init gpio_direction_none(void __iomem * addr)
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2012-06-25 18:41:09 +08:00
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{
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__raw_writeb(0x00, addr);
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}
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2012-09-15 04:08:08 +08:00
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static inline void __init gpio_request_pullup(void __iomem * addr)
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2012-06-25 18:41:09 +08:00
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{
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u8 data = __raw_readb(addr);
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data &= 0x0F;
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data |= 0xC0;
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__raw_writeb(data, addr);
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}
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2012-09-15 04:08:08 +08:00
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static inline void __init gpio_request_pulldown(void __iomem * addr)
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2012-06-25 18:41:09 +08:00
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{
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u8 data = __raw_readb(addr);
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data &= 0x0F;
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data |= 0xA0;
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__raw_writeb(data, addr);
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}
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2010-02-10 19:10:55 +08:00
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#endif /* __ASM_ARCH_GPIO_H */
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