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.ujfalusi@xxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
