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pinctrl: mediatek: Add get_direction support. 

Since Linux gpio framework return 0 for output, 1 for input.
But HW use 0 stands for input, and 1 stands for output.
So use negative to correct it.

And gpio_chip.get is used to get input value, no need to get
output value, so removing it.

Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Hongzhou Yang 2015-11-17 14:17:13 -08:00 committed by Linus Walleij
parent c3dd25cc78
commit f97c230966
1 changed files with 4 additions and 7 deletions
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7
drivers/pinctrl/mediatek/pinctrl-mtk-common.c
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@ -747,7 +747,7 @@ static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
bit = BIT(offset & 0xf);
regmap_read(pctl->regmap1, reg_addr, &read_val);
return !!(read_val & bit);
return !(read_val & bit);
}
static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)
@ -757,10 +757,6 @@ static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)
unsigned int read_val = 0;
struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
if (mtk_gpio_get_direction(chip, offset))
reg_addr = mtk_get_port(pctl, offset) +
pctl->devdata->dout_offset;
else
reg_addr = mtk_get_port(pctl, offset) +
pctl->devdata->din_offset;
@ -997,6 +993,7 @@ static struct gpio_chip mtk_gpio_chip = {
.owner = THIS_MODULE,
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.get_direction = mtk_gpio_get_direction,
.direction_input = mtk_gpio_direction_input,
.direction_output = mtk_gpio_direction_output,
.get = mtk_gpio_get,