When the GPIO is configured as output we need to read the GPIODATAOUT*
register to get correct information. When the GPIO is output the GPIODATAIN*
registers report 0 all the time (no feedback from output path).
Signed-off-by: Peter Ujfalusi <peter.ujfal...@ti.com>
---
drivers/gpio/gpio-twl4030.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 55b4fe4..e7aa620 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -191,13 +191,19 @@ static int twl4030_get_gpio_datain(int gpio)
u8 d_bnk = gpio >> 3;
u8 d_off = gpio & 0x7;
u8 base = 0;
+ int direction;
int ret = 0;
if (unlikely((gpio >= TWL4030_GPIO_MAX)
|| !(gpio_usage_count & BIT(gpio))))
return -EPERM;
- base = REG_GPIODATAIN1 + d_bnk;
+ direction = gpio_twl4030_read(REG_GPIODATADIR1 + d_bnk);
+ if (direction > 0 && (direction >> d_off) & 0x1)
+ base = REG_SETGPIODATAOUT1 + d_bnk;
+ else
+ base = REG_GPIODATAIN1 + d_bnk;
+
ret = gpio_twl4030_read(base);
if (ret > 0)
ret = (ret >> d_off) & 0x1;
--
1.8.0
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