Re: [Patch v4 2/2] gpio: Document GPIO hogging mechanism
From: Alexandre Courbot <hidden>
Date: 2014-12-17 08:43:35
Also in:
linux-gpio, lkml
A few nits: On Sat, Dec 13, 2014 at 7:07 AM, Benoit Parrot [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Add GPIO hogging documentation to gpio.txt Signed-off-by: Benoit Parrot <redacted> --- Changes since v3: * Renamed the "direction" DT properties to "state". Documentation/devicetree/bindings/gpio/gpio.txt | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt index 3fb8f53..a38da91 100644 --- a/Documentation/devicetree/bindings/gpio/gpio.txt +++ b/Documentation/devicetree/bindings/gpio/gpio.txt@@ -103,6 +103,22 @@ Every GPIO controller node must contain both an empty "gpio-controller" property, and a #gpio-cells integer property, which indicates the number of cells in a gpio-specifier. +The GPIO chip may contain GPIO hog definitions. GPIO hogging is a mechanism +providing automatic GPIO request and configuration as part of the +gpio-controller's driver probe function. + +Each GPIO hog definition is represented as a child node of the GPIO controller. +Required properties: +- gpio-hog: A property specifying that this child node represent a gpio-hog.
... represent a GPIO hog.
+- gpios: Store the gpio information (id, flags, ...). Shall contain the + number of cells specified in its parent node (GPIO controller + node). +- state: A property specifying the direction/value needed. This property + can take the folowing values: input, output-high, output-low.
s/folowing/following This aside, Reviewed-by: Alexandre Courbot <redacted> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html