Commit e033108b authored Jun 28, 2006 by Guennadi Liakhovetski Committed by Russell King Jun 28, 2006

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

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>

parent 87c01737

arch/arm/mach-pxa/irq.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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)))