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ar71xx: optimize GPIO code 

SVN-Revision: 20242
owl
Gabor Juhos 2010-03-16 14:02:31 +00:00
parent cfdbb2508d
commit 74556519e3
1 changed files with 24 additions and 21 deletions
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45
target/linux/ar71xx/files/arch/mips/ar71xx/gpio.c
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@ -27,22 +27,18 @@ EXPORT_SYMBOL(ar71xx_gpio_count);
void __ar71xx_gpio_set_value(unsigned gpio, int value)
{
unsigned long flags;
spin_lock_irqsave(&ar71xx_gpio_lock, flags);
void __iomem *base = ar71xx_gpio_base;
if (value)
ar71xx_gpio_wr(GPIO_REG_SET, (1 << gpio));
__raw_writel(1 << gpio, base + GPIO_REG_SET);
else
ar71xx_gpio_wr(GPIO_REG_CLEAR, (1 << gpio));
spin_unlock_irqrestore(&ar71xx_gpio_lock, flags);
__raw_writel(1 << gpio, base + GPIO_REG_CLEAR);
}
EXPORT_SYMBOL(__ar71xx_gpio_set_value);
int __ar71xx_gpio_get_value(unsigned gpio)
{
return (ar71xx_gpio_rr(GPIO_REG_IN) & (1 << gpio)) ? 1 : 0;
return !!(__raw_readl(ar71xx_gpio_base + GPIO_REG_IN) & (1 << gpio));
}
EXPORT_SYMBOL(__ar71xx_gpio_get_value);
@ -60,12 +56,13 @@ static void ar71xx_gpio_set_value(struct gpio_chip *chip,
static int ar71xx_gpio_direction_input(struct gpio_chip *chip,
unsigned offset)
{
void __iomem *base = ar71xx_gpio_base;
unsigned long flags;
spin_lock_irqsave(&ar71xx_gpio_lock, flags);
ar71xx_gpio_wr(GPIO_REG_OE,
ar71xx_gpio_rr(GPIO_REG_OE) & ~(1 << offset));
__raw_writel(__raw_readl(base + GPIO_REG_OE) & ~(1 << offset),
base + GPIO_REG_OE);
spin_unlock_irqrestore(&ar71xx_gpio_lock, flags);
@ -75,17 +72,18 @@ static int ar71xx_gpio_direction_input(struct gpio_chip *chip,
static int ar71xx_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
void __iomem *base = ar71xx_gpio_base;
unsigned long flags;
spin_lock_irqsave(&ar71xx_gpio_lock, flags);
if (value)
ar71xx_gpio_wr(GPIO_REG_SET, (1 << offset));
__raw_writel(1 << offset, base + GPIO_REG_SET);
else
ar71xx_gpio_wr(GPIO_REG_CLEAR, (1 << offset));
__raw_writel(1 << offset, base + GPIO_REG_CLEAR);
ar71xx_gpio_wr(GPIO_REG_OE,
ar71xx_gpio_rr(GPIO_REG_OE) | (1 << offset));
__raw_writel(__raw_readl(base + GPIO_REG_OE) | (1 << offset),
base + GPIO_REG_OE);
spin_unlock_irqrestore(&ar71xx_gpio_lock, flags);
@ -104,40 +102,45 @@ static struct gpio_chip ar71xx_gpio_chip = {
void ar71xx_gpio_function_enable(u32 mask)
{
void __iomem *base = ar71xx_gpio_base;
unsigned long flags;
spin_lock_irqsave(&ar71xx_gpio_lock, flags);
ar71xx_gpio_wr(GPIO_REG_FUNC, ar71xx_gpio_rr(GPIO_REG_FUNC) | mask);
__raw_writel(__raw_readl(base + GPIO_REG_FUNC) | mask,
base + GPIO_REG_FUNC);
/* flush write */
(void) ar71xx_gpio_rr(GPIO_REG_FUNC);
(void) __raw_readl(base + GPIO_REG_FUNC);
spin_unlock_irqrestore(&ar71xx_gpio_lock, flags);
}
void ar71xx_gpio_function_disable(u32 mask)
{
void __iomem *base = ar71xx_gpio_base;
unsigned long flags;
spin_lock_irqsave(&ar71xx_gpio_lock, flags);
ar71xx_gpio_wr(GPIO_REG_FUNC, ar71xx_gpio_rr(GPIO_REG_FUNC) & ~mask);
__raw_writel(__raw_readl(base + GPIO_REG_FUNC) & ~mask,
base + GPIO_REG_FUNC);
/* flush write */
(void) ar71xx_gpio_rr(GPIO_REG_FUNC);
(void) __raw_readl(base + GPIO_REG_FUNC);
spin_unlock_irqrestore(&ar71xx_gpio_lock, flags);
}
void ar71xx_gpio_function_setup(u32 set, u32 clear)
{
void __iomem *base = ar71xx_gpio_base;
unsigned long flags;
spin_lock_irqsave(&ar71xx_gpio_lock, flags);
ar71xx_gpio_wr(GPIO_REG_FUNC,
(ar71xx_gpio_rr(GPIO_REG_FUNC) & ~clear) | set);
__raw_writel((__raw_readl(base + GPIO_REG_FUNC) & ~clear) | set,
base + GPIO_REG_FUNC);
/* flush write */
(void) ar71xx_gpio_rr(GPIO_REG_FUNC);
(void) __raw_readl(base + GPIO_REG_FUNC);
spin_unlock_irqrestore(&ar71xx_gpio_lock, flags);
}