backlight: gpio: add support for multiple GPIOs for backlight control #552
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added 2 commits
January 22, 2026 09:13
Update the gpio-backlight binding to support configurations that require more than one GPIO for enabling/disabling the backlight. Link: https://lore.kernel.org/all/20260120125036.2203995-2-tessolveupstream@gmail.com/ Signed-off-by: Sudarshan Shetty <tessolveupstream@gmail.com> Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
…ht control The gpio-backlight driver currently supports only a single GPIO to enable or disable a backlight device. Some panels require multiple enable GPIOs to be asserted together. Extend the driver to support an array of GPIOs for a single backlight instance. All configured GPIOs are toggled together based on the backlight state. Existing single-GPIO Device Tree users remain unaffected. Link: https://lore.kernel.org/all/20260120125036.2203995-3-tessolveupstream@gmail.com/ Signed-off-by: Sudarshan Shetty <tessolveupstream@gmail.com> Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
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This patch extends the gpio-backlight driver and its Device Tree
bindings to support multiple GPIOs for controlling a single
backlight device.
Some panels require more than one GPIO to enable or disable the
backlight, and previously the driver only supported a single GPIO.
With this change:
based on brightness state.
or more GPIOs for a gpio-backlight node.
This approach avoids describing multiple backlight devices in DT for a
single panel.