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davinci: fixups for banked GPIO interrupt handling 

This patch seems to get me much more reliable performance using the
GPIO banked interrupts on dm355 for the dm9000 driver.

Changes include:

- init GPIO handling along with normal GPIO init
- mask the level-sensitive bank IRQ during handling

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Kevin Hilman 2009-05-11 11:04:53 -07:00
parent df4aab46a8
commit dc75602628
1 changed files with 3 additions and 1 deletions
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4
arch/arm/mach-davinci/gpio.c
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@ -45,6 +45,7 @@ static struct gpio_controller __iomem * __init gpio2controller(unsigned gpio)
return __gpio_to_controller(gpio);
}
static int __init davinci_gpio_irq_setup(void);
/*--------------------------------------------------------------------------*/
@ -157,6 +158,7 @@ static int __init davinci_gpio_setup(void)
gpiochip_add(&chips[i].chip);
}
davinci_gpio_irq_setup();
return 0;
}
pure_initcall(davinci_gpio_setup);
@ -238,6 +240,7 @@ gpio_irq_handler(unsigned irq, struct irq_desc *desc)
mask <<= 16;
/* temporarily mask (level sensitive) parent IRQ */
desc->chip->mask(irq);
desc->chip->ack(irq);
while (1) {
u32 status;
@ -333,4 +336,3 @@ static int __init davinci_gpio_irq_setup(void)
return 0;
}
arch_initcall(davinci_gpio_irq_setup);