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gpio-rcar: Use OUTDT when reading GPIOs configured as output 

Testing on r8a7790 shows that INDT does not indicate the correct
pin state when reading a GPIO configured as output, so update
the gpio_rcar_get() function to handle this case.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Magnus Damm 2013-06-17 08:41:52 +09:00 committed by Linus Walleij
parent cd73891647
commit ae9550f635
1 changed files with 8 additions and 1 deletions
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9
drivers/gpio/gpio-rcar.c
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@ -214,7 +214,14 @@ static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset)
static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
{
return (int)(gpio_rcar_read(gpio_to_priv(chip), INDT) & BIT(offset));
u32 bit = BIT(offset);
/* testing on r8a7790 shows that INDT does not show correct pin state
* when configured as output, so use OUTDT in case of output pins */
if (gpio_rcar_read(gpio_to_priv(chip), INOUTSEL) & bit)
return (int)(gpio_rcar_read(gpio_to_priv(chip), OUTDT) & bit);
else
return (int)(gpio_rcar_read(gpio_to_priv(chip), INDT) & bit);
}
static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)