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gpio: msic: Fix calculating register address in msic_gpio_to_oreg()

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In the case offset is 20 ... 23, the equation to get the register should be:
        INTEL_MSIC_GPIO1HV0CTLO - offset + 20

With above equation, we can get below mapping between offset and the register:
        offset is 20: INTEL_MSIC_GPIO1HV0CTLO
        offset is 21: INTEL_MSIC_GPIO1HV1CTLO
        offset is 22: INTEL_MSIC_GPIO1HV2CTLO
        offset is 23: INTEL_MSIC_GPIO1HV3CTLO

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Axel Lin 2012-07-24 18:35:16 +08:00 committed by Linus Walleij
parent 8abdd2d2d8
commit f7da0bdbf5
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-msic.c
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@ -99,7 +99,7 @@ static int msic_gpio_to_oreg(unsigned offset)
if (offset < 20)
return INTEL_MSIC_GPIO0HV0CTLO - offset + 16;
return INTEL_MSIC_GPIO1HV0CTLO + offset + 20;
return INTEL_MSIC_GPIO1HV0CTLO - offset + 20;
}
static int msic_gpio_direction_input(struct gpio_chip *chip, unsigned offset)