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openwrt-xburst/target/linux/lantiq/patches/0025-MIPS-lantiq-activate-pull-up-resistors-when-gpio-is-.patch
blogic dfffaea839 lantiq: bump to 3.1
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28721 3c298f89-4303-0410-b956-a3cf2f4a3e73
2011-11-03 15:15:52 +00:00

44 lines
1.4 KiB
Diff

From 6efd9a5f303c4561eee14ae429b8c0fafa6c5a83 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 27 Oct 2011 20:06:30 +0200
Subject: [PATCH 11/22] MIPS: lantiq: activate pull up resistors when gpio is
a input
The register that enables a gpios internal pullups was not set.
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(-)
--- 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(stru
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(str
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;