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arm: at91: Cleanup irq chip 

Avoid the whole lazy disable dance in the demux handler by providing a
irq_disable() callback.

Use the proper accessor functions and tidy up gpio_irq_handler()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-03-24 12:48:18 +01:00
parent 5093aec872
commit ac93cdbd6e
1 changed files with 9 additions and 22 deletions
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31
arch/arm/mach-at91/gpio.c
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@ -375,6 +375,7 @@ static int gpio_irq_type(struct irq_data *d, unsigned type)
static struct irq_chip gpio_irqchip = {
.name = "GPIO",
.irq_disable = gpio_irq_mask,
.irq_mask = gpio_irq_mask,
.irq_unmask = gpio_irq_unmask,
.irq_set_type = gpio_irq_type,
@ -384,16 +385,14 @@ static struct irq_chip gpio_irqchip = {
static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
{
unsigned pin;
struct irq_desc *gpio;
struct at91_gpio_chip *at91_gpio;
void __iomem *pio;
struct irq_data *idata = irq_desc_get_irq_data(desc);
struct irq_chip *chip = irq_data_get_irq_chip(idata);
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(idata);
void __iomem *pio = at91_gpio->regbase;
u32 isr;
at91_gpio = get_irq_chip_data(irq);
pio = at91_gpio->regbase;
/* temporarily mask (level sensitive) parent IRQ */
desc->irq_data.chip->irq_ack(&desc->irq_data);
chip->irq_ack(idata);
for (;;) {
/* Reading ISR acks pending (edge triggered) GPIO interrupts.
* When there none are pending, we're finished unless we need
@ -409,27 +408,15 @@ static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
}
pin = at91_gpio->chip.base;
gpio = &irq_desc[pin];
while (isr) {
if (isr & 1) {
if (unlikely(gpio->depth)) {
/*
* The core ARM interrupt handler lazily disables IRQs so
* another IRQ must be generated before it actually gets
* here to be disabled on the GPIO controller.
*/
gpio_irq_mask(irq_get_irq_data(pin));
}
else
generic_handle_irq(pin);
}
if (isr & 1)
generic_handle_irq(pin);
pin++;
gpio++;
isr >>= 1;
}
}
desc->irq_data.chip->irq_unmask(&desc->irq_data);
chip->irq_unmask(idata);
/* now it may re-trigger */
}