From 44ce17192a01218b242e032237e1d2e52ef50429 Mon Sep 17 00:00:00 2001
From: Bruno Randolf <br1@einfach.org>
Date: Tue, 23 Sep 2008 19:48:36 +0200
Subject: [PATCH] [MIPS] au1000: Fix gpio direction
When setting the direction of one GPIO pin we have to keep the state of the
other pins, hence use binary OR. Also gpio_direction_output() wants to set an
initial value, so add that too.
This fixes a problem with the USB power switch on mtx-1 boards.
Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/au1000/common/gpio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/mips/au1000/common/gpio.c b/arch/mips/au1000/common/gpio.c
index b485d94ce8a5..1f058434b726 100644
--- a/arch/mips/au1000/common/gpio.c
+++ b/arch/mips/au1000/common/gpio.c
@@ -61,7 +61,8 @@ static int au1xxx_gpio2_direction_input(unsigned gpio)
static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
{
gpio -= AU1XXX_GPIO_BASE;
- gpio2->dir = (0x01 << gpio) | (value << gpio);
+ gpio2->dir |= 0x01 << gpio;
+ gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | (value << gpio);
return 0;
}
@@ -90,6 +91,7 @@ static int au1xxx_gpio1_direction_input(unsigned gpio)
static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
{
gpio1->trioutclr = (0x01 & gpio);
+ au1xxx_gpio1_write(gpio, value);
return 0;
}
--
2.20.1