diff options
| author | Christian Lamparter <chunkeey@googlemail.com> | 2016-05-08 15:08:22 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-05-10 13:58:47 +0200 |
| commit | 5b64250b614a9d3dff380035be17811cd479d8e8 (patch) | |
| tree | dea069b681aa2c1252f34e3aa102c0d1deced593 | |
| parent | gpio: of: make it possible to name GPIO lines (diff) | |
| download | linux-5b64250b614a9d3dff380035be17811cd479d8e8.tar.xz linux-5b64250b614a9d3dff380035be17811cd479d8e8.zip | |
gpio: dt-bindings: add wd,mbl-gpio bindings
This patch adds the device tree bindings for the Western Digital's
MyBook Live memory-mapped GPIO controllers.
The gpios will be supported by gpio-mmio code of the
GPIO generic library.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt b/Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt new file mode 100644 index 000000000000..038c3a6a1f4d --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt @@ -0,0 +1,38 @@ +Bindings for the Western Digital's MyBook Live memory-mapped GPIO controllers. + +The Western Digital MyBook Live has two memory-mapped GPIO controllers. +Both GPIO controller only have a single 8-bit data register, where GPIO +state can be read and/or written. + +Required properties: + - compatible: should be "wd,mbl-gpio" + - reg-names: must contain + "dat" - data register + - reg: address + size pairs describing the GPIO register sets; + order must correspond with the order of entries in reg-names + - #gpio-cells: must be set to 2. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + - gpio-controller: Marks the device node as a gpio controller. + +Optional properties: + - no-output: GPIOs are read-only. + +Examples: + gpio0: gpio0@e0000000 { + compatible = "wd,mbl-gpio"; + reg-names = "dat"; + reg = <0xe0000000 0x1>; + #gpio-cells = <2>; + gpio-controller; + }; + + gpio1: gpio1@e0100000 { + compatible = "wd,mbl-gpio"; + reg-names = "dat"; + reg = <0xe0100000 0x1>; + #gpio-cells = <2>; + gpio-controller; + no-output; + }; |