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MIPS: AR7: Implement gpiolib

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This patch implements gpiolib for the AR7 SoC.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/816/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Florian Fainelli
2010-01-03 21:16:51 +01:00
committed by Ralf Baechle
parent 69b427cd23
commit 5f3c909881
4 changed files with 108 additions and 94 deletions
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86
arch/mips/include/asm/mach-ar7/gpio.h
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@@ -1,5 +1,5 @@
/*
* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
* Copyright (C) 2007-2009 Florian Fainelli <florian@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -22,88 +22,18 @@
#include <asm/mach-ar7/ar7.h>
#define AR7_GPIO_MAX 32
#define NR_BUILTIN_GPIO AR7_GPIO_MAX
extern int gpio_request(unsigned gpio, const char *label);
extern void gpio_free(unsigned gpio);
#define gpio_to_irq(gpio) NULL
/* Common GPIO layer */
static inline int gpio_get_value(unsigned gpio)
{
void __iomem *gpio_in =
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
#define gpio_get_value __gpio_get_value
#define gpio_set_value __gpio_set_value
return readl(gpio_in) & (1 << gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
void __iomem *gpio_out =
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT);
unsigned tmp;
tmp = readl(gpio_out) & ~(1 << gpio);
if (value)
tmp |= 1 << gpio;
writel(tmp, gpio_out);
}
static inline int gpio_direction_input(unsigned gpio)
{
void __iomem *gpio_dir =
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
if (gpio >= AR7_GPIO_MAX)
return -EINVAL;
writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
return 0;
}
static inline int gpio_direction_output(unsigned gpio, int value)
{
void __iomem *gpio_dir =
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
if (gpio >= AR7_GPIO_MAX)
return -EINVAL;
gpio_set_value(gpio, value);
writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
return 0;
}
static inline int gpio_to_irq(unsigned gpio)
{
return -EINVAL;
}
static inline int irq_to_gpio(unsigned irq)
{
return -EINVAL;
}
#define gpio_cansleep __gpio_cansleep
/* Board specific GPIO functions */
static inline int ar7_gpio_enable(unsigned gpio)
{
void __iomem *gpio_en =
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
writel(readl(gpio_en) | (1 << gpio), gpio_en);
return 0;
}
static inline int ar7_gpio_disable(unsigned gpio)
{
void __iomem *gpio_en =
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
return 0;
}
int ar7_gpio_enable(unsigned gpio);
int ar7_gpio_disable(unsigned gpio);
#include <asm-generic/gpio.h>