c4982887ca
Patch from Lennert Buytenhek This patch cleans up the ixp2000 gpio irq code and implements the set_irq_type method for gpio irqs so that users can select for which events (falling edge/rising edge/level low/level high) on the gpio pin they want the corresponding gpio irq to be triggered. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
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* include/asm-arm/arch-ixp2000/gpio.h
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*
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* Copyright (C) 2002 Intel Corporation.
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* IXP2000 GPIO in/out, edge/level detection for IRQs:
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* IRQs are generated on Falling-edge, Rising-Edge, Level-low, Level-High
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* or both Falling-edge and Rising-edge.
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* This must be called *before* the corresponding IRQ is registerd.
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* Use this instead of directly setting the GPIO registers.
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* GPIOs may also be used as GPIOs (e.g. for emulating i2c/smb)
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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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#ifndef __ASSEMBLY__
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#define GPIO_IN 0
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#define GPIO_OUT 1
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#define IXP2000_GPIO_LOW 0
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#define IXP2000_GPIO_HIGH 1
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extern void gpio_line_config(int line, int direction);
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static inline int gpio_line_get(int line)
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{
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return (((*IXP2000_GPIO_PLR) >> line) & 1);
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}
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static inline void gpio_line_set(int line, int value)
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{
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if (value == IXP2000_GPIO_HIGH) {
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ixp2000_reg_write(IXP2000_GPIO_POSR, 1 << line);
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} else if (value == IXP2000_GPIO_LOW) {
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ixp2000_reg_write(IXP2000_GPIO_POCR, 1 << line);
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}
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* ASM_ARCH_IXP2000_GPIO_H_ */
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