openwrt/target/linux/lantiq/patches-3.2/0014-MIPS-lantiq-fix-pull-gpio-up-resistors-usage.patch

From e97f45d255f4a223d38e2f39c1ddf7a3e0766527 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 27 Oct 2011 20:06:30 +0200
Subject: [PATCH 14/70] MIPS: lantiq: fix pull gpio up resistors usage

The register that enables a gpios internal pullups was not used. This patch
makes sure the pullups are activated correctly.

Signed-off-by: Matti Laakso <malaakso@elisanet.fi>
Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/lantiq/xway/gpio.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/mips/lantiq/xway/gpio.c b/arch/mips/lantiq/xway/gpio.c
index f204f6c..14ff7c7 100644
--- a/arch/mips/lantiq/xway/gpio.c
+++ b/arch/mips/lantiq/xway/gpio.c
@@ -21,6 +21,8 @@
 #define LTQ_GPIO_ALTSEL0	0x0C
 #define LTQ_GPIO_ALTSEL1	0x10
 #define LTQ_GPIO_OD		0x14
+#define LTQ_GPIO_PUDSEL		0x1C
+#define LTQ_GPIO_PUDEN		0x20
 
 #define PINS_PER_PORT		16
 #define MAX_PORTS		3
@@ -106,6 +108,8 @@ static int ltq_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
 
 	ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
 	ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
+	ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset);
+	ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset);
 
 	return 0;
 }
@@ -117,6 +121,8 @@ static int ltq_gpio_direction_output(struct gpio_chip *chip,
 
 	ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
 	ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
+	ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset);
+	ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset);
 	ltq_gpio_set(chip, offset, value);
 
 	return 0;
-- 
1.7.7.1