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ARM: 6100/1: nomadik-gpio: factor out helper to enable/disable irqs

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Remove some nearly-duplicated code to make the following patch simpler.

Acked-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Rabin Vincent 2010-05-06 10:42:42 +01:00 committed by Russell King
parent 6b07aaedc0
commit 040e5ecdda
1 changed files with 34 additions and 37 deletions
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71
arch/arm/plat-nomadik/gpio.c
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@ -107,12 +107,37 @@ static void nmk_gpio_irq_ack(unsigned int irq)
writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC);
}
static void nmk_gpio_irq_mask(unsigned int irq)
static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
int gpio, bool enable)
{
u32 bitmask = nmk_gpio_get_bitmask(gpio);
u32 reg;
/* we must individually set/clear the two edges */
if (nmk_chip->edge_rising & bitmask) {
reg = readl(nmk_chip->addr + NMK_GPIO_RIMSC);
if (enable)
reg |= bitmask;
else
reg &= ~bitmask;
writel(reg, nmk_chip->addr + NMK_GPIO_RIMSC);
}
if (nmk_chip->edge_falling & bitmask) {
reg = readl(nmk_chip->addr + NMK_GPIO_FIMSC);
if (enable)
reg |= bitmask;
else
reg &= ~bitmask;
writel(reg, nmk_chip->addr + NMK_GPIO_FIMSC);
}
}
static void nmk_gpio_irq_modify(unsigned int irq, bool enable)
{
int gpio;
struct nmk_gpio_chip *nmk_chip;
unsigned long flags;
u32 bitmask, reg;
u32 bitmask;
gpio = NOMADIK_IRQ_TO_GPIO(irq);
nmk_chip = get_irq_chip_data(irq);
@ -120,47 +145,19 @@ static void nmk_gpio_irq_mask(unsigned int irq)
if (!nmk_chip)
return;
/* we must individually clear the two edges */
spin_lock_irqsave(&nmk_chip->lock, flags);
if (nmk_chip->edge_rising & bitmask) {
reg = readl(nmk_chip->addr + NMK_GPIO_RIMSC);
reg &= ~bitmask;
writel(reg, nmk_chip->addr + NMK_GPIO_RIMSC);
}
if (nmk_chip->edge_falling & bitmask) {
reg = readl(nmk_chip->addr + NMK_GPIO_FIMSC);
reg &= ~bitmask;
writel(reg, nmk_chip->addr + NMK_GPIO_FIMSC);
}
__nmk_gpio_irq_modify(nmk_chip, gpio, enable);
spin_unlock_irqrestore(&nmk_chip->lock, flags);
}
static void nmk_gpio_irq_mask(unsigned int irq)
{
nmk_gpio_irq_modify(irq, false);
};
static void nmk_gpio_irq_unmask(unsigned int irq)
{
int gpio;
struct nmk_gpio_chip *nmk_chip;
unsigned long flags;
u32 bitmask, reg;
gpio = NOMADIK_IRQ_TO_GPIO(irq);
nmk_chip = get_irq_chip_data(irq);
bitmask = nmk_gpio_get_bitmask(gpio);
if (!nmk_chip)
return;
/* we must individually set the two edges */
spin_lock_irqsave(&nmk_chip->lock, flags);
if (nmk_chip->edge_rising & bitmask) {
reg = readl(nmk_chip->addr + NMK_GPIO_RIMSC);
reg |= bitmask;
writel(reg, nmk_chip->addr + NMK_GPIO_RIMSC);
}
if (nmk_chip->edge_falling & bitmask) {
reg = readl(nmk_chip->addr + NMK_GPIO_FIMSC);
reg |= bitmask;
writel(reg, nmk_chip->addr + NMK_GPIO_FIMSC);
}
spin_unlock_irqrestore(&nmk_chip->lock, flags);
nmk_gpio_irq_modify(irq, true);
}
static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type)