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pinctrl: baytrail: show output gpio state correctly on Intel Baytrail 

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: <stable@vger.kernel.org> # v3.14+
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
David Cohen 2014-10-14 10:54:37 -07:00 committed by Linus Walleij
parent c11f042b86
commit d90c338189
1 changed files with 1 additions and 1 deletions
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2
drivers/pinctrl/pinctrl-baytrail.c
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@ -322,7 +322,7 @@ static int byt_gpio_direction_output(struct gpio_chip *chip,
"Potential Error: Setting GPIO with direct_irq_en to output"); "Potential Error: Setting GPIO with direct_irq_en to output");
reg_val = readl(reg) | BYT_DIR_MASK; reg_val = readl(reg) | BYT_DIR_MASK;
reg_val &= ~BYT_OUTPUT_EN; reg_val &= ~(BYT_OUTPUT_EN | BYT_INPUT_EN);
if (value) if (value)
writel(reg_val | BYT_LEVEL, reg); writel(reg_val | BYT_LEVEL, reg);