diff options
| author | Andrew Victor <andrew@sanpeople.com> | 2006-02-24 23:27:50 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-02-24 23:27:50 +0100 |
| commit | abbea7187296a7fb316a55f2319438c2bf881f0a (patch) | |
| tree | 28e8988de3cc8e81691bfd0170b1d03032dc7da7 /arch/arm/mach-at91rm9200/gpio.c | |
| parent | Merge branch 'upstream-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/... (diff) | |
| download | linux-abbea7187296a7fb316a55f2319438c2bf881f0a.tar.xz linux-abbea7187296a7fb316a55f2319438c2bf881f0a.zip | |
[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 <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-at91rm9200/gpio.c')
| -rw-r--r-- | arch/arm/mach-at91rm9200/gpio.c | 14 |
1 files 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; |