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authorHartley Sweeten <hartleys@visionengravers.com>2008-10-28 17:55:30 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-12-01 17:22:09 +0000
commit799a0600ac49b03c1a6244847c2725c0082ba775 (patch)
tree971e5b3529b09228b095feedc9eeb9e0734fa568 /arch/arm/mach-ep93xx/include
parentd52a26a956d3925c6eaf8770e95e4d5f13740696 (diff)
[ARM] 5324/2: ep93xx: support gpio interrupt debounce
Add debounce support for ep93xx gpio interrupts. On the EP93xx, GPIO ports A, B, and F can be used to generate interrupts. For each port, if interrupts are enabled, it is possible to debouce the input signal. Debouncing is implemented by passing the input signal through a 2-bit shift register clocked by a 128Hz clock. This patch adds a platform specific way to enable the debouce feature for these input ports. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ep93xx/include')
-rw-r--r--arch/arm/mach-ep93xx/include/mach/gpio.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/include/mach/gpio.h b/arch/arm/mach-ep93xx/include/mach/gpio.h
index f7020414c5d..0a1498ae899 100644
--- a/arch/arm/mach-ep93xx/include/mach/gpio.h
+++ b/arch/arm/mach-ep93xx/include/mach/gpio.h
@@ -99,6 +99,8 @@
/* maximum value for irq capable line identifiers */
#define EP93XX_GPIO_LINE_MAX_IRQ EP93XX_GPIO_LINE_F(7)
+extern void ep93xx_gpio_int_debounce(unsigned int irq, int enable);
+
/* new generic GPIO API - see Documentation/gpio.txt */
#include <asm-generic/gpio.h>