In current gpio_set_value() implementation, it always sets the gpio control bit no matter the value argument is 0 or 1. Thus the GPIOs never set to low. This patch fixes this bug.
Signed-off-by: Axel Lin axel.lin@ingics.com --- drivers/gpio/spear_gpio.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/spear_gpio.c b/drivers/gpio/spear_gpio.c index d3c728e..8878608 100644 --- a/drivers/gpio/spear_gpio.c +++ b/drivers/gpio/spear_gpio.c @@ -52,7 +52,10 @@ int gpio_set_value(unsigned gpio, int value) { struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
- writel(1 << gpio, ®s->gpiodata[DATA_REG_ADDR(gpio)]); + if (value) + writel(1 << gpio, ®s->gpiodata[DATA_REG_ADDR(gpio)]); + else + writel(0, ®s->gpiodata[DATA_REG_ADDR(gpio)]);
return 0; }