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49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
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* Ralink SoC specific GPIO support
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*
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* Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#ifndef _RAMIPS_GPIO_H
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#define _RAMIPS_GPIO_H
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#include <linux/gpio.h>
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#include <linux/spinlock.h>
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enum ramips_gpio_reg {
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RAMIPS_GPIO_REG_INT = 0, /* Interrupt status */
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RAMIPS_GPIO_REG_EDGE,
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RAMIPS_GPIO_REG_RENA,
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RAMIPS_GPIO_REG_FENA,
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RAMIPS_GPIO_REG_DATA,
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RAMIPS_GPIO_REG_DIR, /* Direction, 0:in, 1: out */
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RAMIPS_GPIO_REG_POL, /* Polarity, 0: normal, 1: invert */
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RAMIPS_GPIO_REG_SET,
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RAMIPS_GPIO_REG_RESET,
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RAMIPS_GPIO_REG_TOGGLE,
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RAMIPS_GPIO_REG_MAX
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};
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struct ramips_gpio_chip {
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struct gpio_chip chip;
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unsigned long map_base;
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unsigned long map_size;
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u8 regs[RAMIPS_GPIO_REG_MAX];
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spinlock_t lock;
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void __iomem *regs_base;
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};
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struct ramips_gpio_data {
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unsigned int num_chips;
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struct ramips_gpio_chip *chips;
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};
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int ramips_gpio_init(struct ramips_gpio_data *data);
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#endif /* _RAMIPS_GPIO_H */
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