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[ARM] 3672/1: PXA: don't probe output GPIOs for interrupt

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Patch from Guennadi Liakhovetski

Currently probe_irq_on() on PXA will silently reconfigure all output GPIOs, that are not configured as alternate functions, for input. Avoid that. Upon CPU reset all GPIOs are configured as inputs, so, if a GPIO is configured as output, it has been done so intentionally.

Signed-off-by: G. Liakhovetski <gl@dsa-ac.de>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Guennadi Liakhovetski 2006-06-28 16:42:02 +01:00 committed by Russell King
parent 87c01737b1
commit e033108bf7
1 changed files with 2 additions and 2 deletions
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4
arch/arm/mach-pxa/irq.c
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@ -88,8 +88,8 @@ static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
if (type == IRQT_PROBE) {
/* Don't mess with enabled GPIOs using preconfigured edges or
GPIOs set to alternate function during probe */
if ((GPIO_IRQ_rising_edge[idx] | GPIO_IRQ_falling_edge[idx]) &
GPIOs set to alternate function or to output during probe */
if ((GPIO_IRQ_rising_edge[idx] | GPIO_IRQ_falling_edge[idx] | GPDR(gpio)) &
GPIO_bit(gpio))
return 0;
if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))