From abbea7187296a7fb316a55f2319438c2bf881f0a Mon Sep 17 00:00:00 2001 From: Andrew Victor Date: Fri, 24 Feb 2006 22:27:50 +0000 Subject: [ARM] 3348/1: Disable GPIO interrupts Patch from Andrew Victor disable_irq() lazily disables the interrupt, so the IRQ is only disabled once the interrupt occurs again. The GPIO interrupt handler therefore must first check disable_depth to see if the IRQ needs to be disabled. Orignal patch by Bill Gatliff. Signed-off-by: Andrew Victor Signed-off-by: Russell King --- arch/arm/mach-at91rm9200/gpio.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-at91rm9200/gpio.c b/arch/arm/mach-at91rm9200/gpio.c index a9f718bf8ba8..0e396feec468 100644 --- a/arch/arm/mach-at91rm9200/gpio.c +++ b/arch/arm/mach-at91rm9200/gpio.c @@ -274,8 +274,18 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs gpio = &irq_desc[pin]; while (isr) { - if (isr & 1) - gpio->handle(pin, gpio, regs); + if (isr & 1) { + if (unlikely(gpio->disable_depth)) { + /* + * The core ARM interrupt handler lazily disables IRQs so + * another IRQ must be generated before it actually gets + * here to be disabled on the GPIO controller. + */ + gpio_irq_mask(pin); + } + else + gpio->handle(pin, gpio, regs); + } pin++; gpio++; isr >>= 1; -- cgit v1.2.3