[PATCH V4 2/2] gpio: inverter: document the inverter bindings
From: Harish Jenny K N <hidden>
Date: 2019-06-28 09:30:50
Also in:
linux-gpio
Subsystem:
gpio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Linus Walleij, Bartosz Golaszewski, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Document the device tree binding for the inverter gpio controller to configure the polarity of the gpio pins used by the consumers. Signed-off-by: Harish Jenny K N <redacted> --- .../devicetree/bindings/gpio/gpio-inverter.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-inverter.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-inverter.txt b/Documentation/devicetree/bindings/gpio/gpio-inverter.txt
new file mode 100644
index 0000000..8bb6b2e
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-inverter.txt@@ -0,0 +1,29 @@ +GPIO-INVERTER +====== +This binding defines the gpio-inverter. The gpio-inverter is a driver that +allows to properly describe the gpio polarities on the hardware. + +Please refer to gpio.txt for generic information regarding GPIO bindings. + +Required properties: +- compatible : "gpio-inverter". +- gpio-controller: Marks the port as GPIO controller. +- #gpio-cells: One. This is the pin number. +- inverted-gpios: Array of GPIO pins required from consumers, whose polarity + has to be inverted in the driver. +Note: gpio flag should be set as GPIO_ACTIVE_HIGH. Using GPIO_ACTICE_LOW will +cause double inversion. + +Optional properties: +- gpio-line-names: Refer to gpio.txt for details regarding this property. + +Example: + +gpio_inv: gpio-inv { + compatible = "gpio-inverter"; + gpio-controller; + #gpio-cells = <1>; + inverted-gpios = <&gpio5 24 GPIO_ACTIVE_HIGH>, + <&gpio7 0 GPIO_ACTIVE_HIGH>, <&gpio7 1 GPIO_ACTIVE_HIGH>; + gpio-line-names = "JTAG_DNL_EN", "lvds-pwrdwn", "lcd-on"; +}; --
2.7.4