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gpio: Use new GPIO_LINE_DIRECTION

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It's hard for occasional GPIO code reader/writer to know if values 0/1
equal to IN or OUT. Use defined GPIO_LINE_DIRECTION_IN and
GPIO_LINE_DIRECTION_OUT to help them out.

NOTE - for gpio-amd-fch and gpio-bd9571mwv:
This commit also changes the return value for direction get to equal 1
for direction INPUT. Prior this commit these drivers might have
returned some other positive value but 1 for INPUT.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Acked-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Matti Vaittinen
2019-11-06 10:54:12 +02:00
committed by Linus Walleij
parent 9208b1e77d
commit e42615ec23
60 changed files with 211 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpio/gpio-raspberrypi-exp.c
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@@ -147,7 +147,10 @@ static int rpi_exp_gpio_get_direction(struct gpio_chip *gc, unsigned int off)
get.gpio);
return ret ? ret : -EIO;
}
return !get.direction;
if (get.direction)
return GPIO_LINE_DIRECTION_OUT;
return GPIO_LINE_DIRECTION_IN;
}
static int rpi_exp_gpio_get(struct gpio_chip *gc, unsigned int off)