regulator: gpio: Honor regulator-boot-on property
When requesting the enable GPIO, the driver should do so with the correct output level matching some expected state. This is especially important if the regulator is a critical one, such as a supply for the boot CPU. This is currently done by checking for the enable-at-boot property, but this is not documented in the device tree binding, nor does it match the common regulator properties. Honor the common regulator-boot-on property by checking the boot_on constraint setting within the DT probe path. This is the same as what is done in the fixed regulator driver. Also add a comment stating that the enable-at-boot property should not be used. Fixes: 006694d0 ("regulator: gpio-regulator: Allow use of GPIO controlled regulators though DT") Signed-off-by:Chen-Yu Tsai <wens@csie.org> Link: https://lore.kernel.org/r/20200720132809.26908-1-wens@kernel.orgSigned-off-by:
Mark Brown <broonie@kernel.org>
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