From mboxrd@z Thu Jan 1 00:00:00 1970 From: robh@kernel.org (Rob Herring) Date: Tue, 3 May 2016 21:22:10 -0500 Subject: [RFC v6 1/3] gpio: dt-bindings: add wd,mbl-gpio bindings In-Reply-To: <103bf8fceb426a9c3b09641ea989955e3ec1c7d4.1462104492.git.chunkeey@googlemail.com> References: <103bf8fceb426a9c3b09641ea989955e3ec1c7d4.1462104492.git.chunkeey@googlemail.com> Message-ID: <20160504022210.GA9913@rob-hp-laptop> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sun, May 01, 2016 at 02:18:37PM +0200, Christian Lamparter wrote: > 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 > --- > .../devicetree/bindings/gpio/wd,mbl-gpio.txt | 38 ++++++++++++++++++++++ > 1 file changed, 38 insertions(+) > create mode 100644 Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt > > 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 0000000..038c3a6 > --- /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. Are these really product level GPIOs rather than some SOC's GPIOs (APM?)? > + > +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 at e0000000 { > + compatible = "wd,mbl-gpio"; > + reg-names = "dat"; > + reg = <0xe0000000 0x1>; > + #gpio-cells = <2>; > + gpio-controller; > + }; > + > + gpio1: gpio1 at e0100000 { > + compatible = "wd,mbl-gpio"; > + reg-names = "dat"; > + reg = <0xe0100000 0x1>; > + #gpio-cells = <2>; > + gpio-controller; > + no-output; > + }; > -- > 2.8.1 >