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| author | Chen-Yu Tsai <wens@csie.org> | 2018-02-13 14:08:14 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-02-27 09:48:07 +0100 |
| commit | ce27fb2c56db6ccfe8099343bb4afdab15e77e7b (patch) | |
| tree | 574477fe8e4d08483407487c4b13d957ff30624a /drivers/gpio | |
| parent | 6662ae6af82df10259a70c7569b4c12ea7f3ba93 (diff) | |
| download | linux-ce27fb2c56db6ccfe8099343bb4afdab15e77e7b.tar.gz linux-ce27fb2c56db6ccfe8099343bb4afdab15e77e7b.tar.bz2 linux-ce27fb2c56db6ccfe8099343bb4afdab15e77e7b.zip | |
gpio: Handle deferred probing in of_find_gpio() properly
of_get_named_gpiod_flags() used directly in of_find_gpio() or indirectly
through of_find_spi_gpio() or of_find_regulator_gpio() can return
-EPROBE_DEFER. This gets overwritten by the subsequent of_find_*_gpio()
calls.
This patch fixes this by trying of_find_spi_gpio() or
of_find_regulator_gpio() only if deferred probing was not requested by
the previous of_get_named_gpiod_flags() call.
Fixes: 6a537d48461d ("gpio: of: Support regulator nonstandard GPIO properties")
Fixes: c85823390215 ("gpio: of: Support SPI nonstandard GPIO properties")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
[Augmented to fit with Maxime's patch]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 0ee5dc70268a..84e5a9df2344 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -263,7 +263,7 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, desc = of_find_spi_gpio(dev, con_id, &of_flags); /* Special handling for regulator GPIOs if used */ - if (IS_ERR(desc)) + if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER) desc = of_find_regulator_gpio(dev, con_id, &of_flags); if (IS_ERR(desc)) |