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Commit dc756026 authored by Kevin Hilman's avatar Kevin Hilman
Browse files

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: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent df4aab46

arch/arm/mach-davinci/gpio.c

+3 −1
Original line number Diff line number Diff line
@@ -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);