3.16.7-ckt2 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: David Cohen <david.a.co...@linux.intel.com>
commit d90c33818967c5e5371961604ad98b4dea4fa3f4 upstream.
Even if a gpio pin is set to output, we still need to set INPUT_EN
functionality (by clearing INPUT_EN bit) to be able to read the pin's
level.
E.g. without this change, we'll always read low level state from sysfs.
Cc: Mathias Nyman <mathias.ny...@linux.intel.com>
Signed-off-by: David Cohen <david.a.co...@linux.intel.com>
Reviewed-by: Felipe Balbi <ba...@ti.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
drivers/pinctrl/pinctrl-baytrail.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pinctrl/pinctrl-baytrail.c
b/drivers/pinctrl/pinctrl-baytrail.c
index 975572e2f260..ecbfec9e54d9 100644
--- a/drivers/pinctrl/pinctrl-baytrail.c
+++ b/drivers/pinctrl/pinctrl-baytrail.c
@@ -310,7 +310,7 @@ static int byt_gpio_direction_output(struct gpio_chip *chip,
spin_lock_irqsave(&vg->lock, flags);
reg_val = readl(reg) | BYT_DIR_MASK;
- reg_val &= ~BYT_OUTPUT_EN;
+ reg_val &= ~(BYT_OUTPUT_EN | BYT_INPUT_EN);
if (value)
writel(reg_val | BYT_LEVEL, reg);
--
2.1.0
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