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[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>
This commit is contained in:
Bruno Randolf 2008-09-23 19:48:36 +02:00 committed by Ralf Baechle
parent fb478da5ba
commit 44ce17192a
1 changed files with 3 additions and 1 deletions
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4
arch/mips/au1000/common/gpio.c
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@ -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;
}