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[ARM] 3378/1: ixp2000: fix gpio interrupt handling 

Patch from Lennert Buytenhek

ixp2000 used to initially mark GPIO interrupts as invalid, and not
mark them valid until set_irq_type() was called, but this doesn't
work if you want to use request_irq() with the SA_TRIGGER_* flags.

So, just mark the GPIO interrupts valid from the beginning.  We
configure GPIOs as inputs when set_irq_type() is called anyway, so
this shouldn't be a problem.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Lennert Buytenhek 2006-03-22 20:14:09 +00:00 committed by Russell King
parent bec1b81936
commit bd115ea007
1 changed files with 1 additions and 12 deletions
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13
arch/arm/mach-ixp2000/core.c
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@ -288,8 +288,6 @@ void gpio_line_config(int line, int direction)
local_irq_save(flags);
if (direction == GPIO_OUT) {
irq_desc[line + IRQ_IXP2000_GPIO0].valid = 0;
/* if it's an output, it ain't an interrupt anymore */
GPIO_IRQ_falling_edge &= ~(1 << line);
GPIO_IRQ_rising_edge &= ~(1 << line);
@ -351,11 +349,6 @@ static int ixp2000_GPIO_irq_type(unsigned int irq, unsigned int type)
GPIO_IRQ_level_high &= ~(1 << line);
update_gpio_int_csrs();
/*
* Finally, mark the corresponding IRQ as valid.
*/
irq_desc[irq].valid = 1;
return 0;
}
@ -506,14 +499,10 @@ void __init ixp2000_init_irq(void)
}
set_irq_chained_handler(IRQ_IXP2000_ERRSUM, ixp2000_err_irq_handler);
/*
* GPIO IRQs are invalid until someone sets the interrupt mode
* by calling set_irq_type().
*/
for (irq = IRQ_IXP2000_GPIO0; irq <= IRQ_IXP2000_GPIO7; irq++) {
set_irq_chip(irq, &ixp2000_GPIO_irq_chip);
set_irq_handler(irq, do_level_IRQ);
set_irq_flags(irq, 0);
set_irq_flags(irq, IRQF_VALID);
}
set_irq_chained_handler(IRQ_IXP2000_GPIO, ixp2000_GPIO_irq_handler);