Hi, The axp209 PMIC used in combination to some Allwinner SoCs has a bunch of GPIOs accessible. Some boards use these to control their backlight or a few LEDs.
There's supposed to be 4 of them, but the fourth one has a different configuration register scheme, and I couldn't find any board that was using this GPIO. It will be probably be supported eventually, but until then, we support only the first 3 GPIOs. Let me know what you think, Maxime Maxime Ripard (4): gpio: Add AXP209 GPIO driver mfd: axp20x: Add AXP209 GPIO driver to the mfd ARM: dt: axp209: Add AXP209 GPIO driver ARM: sun5i: chip: Add status LED .../devicetree/bindings/gpio/gpio-axp209.txt | 30 ++++ arch/arm/boot/dts/axp209.dtsi | 6 + arch/arm/boot/dts/sun5i-r8-chip.dts | 10 ++ drivers/gpio/Kconfig | 6 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-axp209.c | 166 +++++++++++++++++++++ drivers/mfd/axp20x.c | 3 + 7 files changed, 222 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-axp209.txt create mode 100644 drivers/gpio/gpio-axp209.c -- 2.7.2 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
