| Message ID | 1418422051-9471-3-git-send-email-bparrot@ti.com |
|---|---|
| State | Changes Requested |
| Headers | show |
A few nits: On Sat, Dec 13, 2014 at 7:07 AM, Benoit Parrot <bparrot@ti.com> wrote: > Add GPIO hogging documentation to gpio.txt > > Signed-off-by: Benoit Parrot <bparrot@ti.com> > --- > 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 <acourbot@nvidia.com> -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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. +- 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. + +Optional properties: +- line-name: The GPIO label name. If not present the node name is used. + Example of two SOC GPIO banks defined as gpio-controller nodes: qe_pio_a: gpio-controller@1400 { @@ -110,6 +126,13 @@ Example of two SOC GPIO banks defined as gpio-controller nodes: reg = <0x1400 0x18>; gpio-controller; #gpio-cells = <2>; + + line_b { + gpio-hog; + gpios = <6 0>; + state = "output-low"; + line-name = "foo-bar-gpio"; + }; }; qe_pio_e: gpio-controller@1460 {
Add GPIO hogging documentation to gpio.txt Signed-off-by: Benoit Parrot <bparrot@ti.com> --- Changes since v3: * Renamed the "direction" DT properties to "state". Documentation/devicetree/bindings/gpio/gpio.txt | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)