gpiolib: check the 'ngpios' property in core gpiolib code

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Several drivers read the 'ngpios' device property on their own, but
since it's defined as a standard GPIO property in the device tree bindings
anyway, it's a good candidate for generalization. If the driver didn't
set its gc->ngpio, try to read the 'ngpios' property from the GPIO
device's firmware node before bailing out.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

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Bartosz Golaszewski 2021-12-02 14:40:34 +01:00

parent e5ab49cd3d

commit 9dbd1ab205

1 changed files with 21 additions and 0 deletions

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drivers/gpio/gpiolib.c

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