Hi,
some bootloader may initialize debounce register and this will make
dbclk not consist with the debounce register after linux kernel boot
up.
>From 8f97e5b50e50627e9e4b40f5d4fba09d750aceb1 Mon Sep 17 00:00:00 2001
From: janboe <janboe...@gmail.com>
Date: Fri, 19 Jun 2009 10:56:02 -0500
Subject: [PATCH] initialize gpio debounce register
Signed-off-by: janboe <janboe...@gmail.com>
---
arch/arm/plat-omap/gpio.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 7fd89ba..26b387c 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -1585,6 +1585,7 @@ static int __init _omap_gpio_init(void)
__raw_writel(0x00000000, bank->base +
OMAP24XX_GPIO_IRQENABLE1);
__raw_writel(0xffffffff, bank->base +
OMAP24XX_GPIO_IRQSTATUS1);
__raw_writew(0x0015, bank->base +
OMAP24XX_GPIO_SYSCONFIG);
+ __raw_writel(0x00000000, bank->base +
OMAP24XX_GPIO_DEBOUNCE_EN);
/* Initialize interface clock ungated, module enabled */
__raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL);
--
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