diff options
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
5 files changed, 75 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt index dbd22e0df21e..b4cd9f906c24 100644 --- a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt +++ b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt @@ -19,6 +19,9 @@ Required properties: 4 = active high level-sensitive. 8 = active low level-sensitive. +Optional properties: +- clocks: the clock for clocking the GPIO silicon + Example: gpio0: gpio@73f84000 { diff --git a/Documentation/devicetree/bindings/gpio/mediatek,mt7621-gpio.txt b/Documentation/devicetree/bindings/gpio/mediatek,mt7621-gpio.txt new file mode 100644 index 000000000000..ba455589f869 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/mediatek,mt7621-gpio.txt @@ -0,0 +1,35 @@ +Mediatek MT7621 SoC GPIO controller bindings + +The IP core used inside these SoCs has 3 banks of 32 GPIOs each. +The registers of all the banks are interwoven inside one single IO range. +We load one GPIO controller instance per bank. Also the GPIO controller can receive +interrupts on any of the GPIOs, either edge or level. It then interrupts the CPU +using GIC INT12. + +Required properties for the top level node: +- #gpio-cells : Should be two. The first cell is the GPIO pin number and the + second cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. + Only the GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. +- #interrupt-cells : Specifies the number of cells needed to encode an + interrupt. Should be 2. The first cell defines the interrupt number, + the second encodes the triger flags encoded as described in + Documentation/devicetree/bindings/interrupt-controller/interrupts.txt +- compatible: + - "mediatek,mt7621-gpio" for Mediatek controllers +- reg : Physical base address and length of the controller's registers +- interrupt-parent : phandle of the parent interrupt controller. +- interrupts : Interrupt specifier for the controllers interrupt. +- interrupt-controller : Mark the device node as an interrupt controller. +- gpio-controller : Marks the device node as a GPIO controller. + +Example: + gpio@600 { + #gpio-cells = <2>; + #interrupt-cells = <2>; + compatible = "mediatek,mt7621-gpio"; + gpio-controller; + interrupt-controller; + reg = <0x600 0x100>; + interrupt-parent = <&gic>; + interrupts = <GIC_SHARED 12 IRQ_TYPE_LEVEL_HIGH>; + }; diff --git a/Documentation/devicetree/bindings/gpio/nvidia,tegra186-gpio.txt b/Documentation/devicetree/bindings/gpio/nvidia,tegra186-gpio.txt index c82a2e221bc1..adff16c71d21 100644 --- a/Documentation/devicetree/bindings/gpio/nvidia,tegra186-gpio.txt +++ b/Documentation/devicetree/bindings/gpio/nvidia,tegra186-gpio.txt @@ -68,6 +68,8 @@ Required properties: One of: - "nvidia,tegra186-gpio". - "nvidia,tegra186-gpio-aon". + - "nvidia,tegra194-gpio". + - "nvidia,tegra194-gpio-aon". - reg-names Array of strings. Contains a list of names for the register spaces described by the reg @@ -91,6 +93,8 @@ Required properties: depending on compatible value: - "nvidia,tegra186-gpio": 6 entries. - "nvidia,tegra186-gpio-aon": 1 entry. + - "nvidia,tegra194-gpio": 6 entries. + - "nvidia,tegra194-gpio-aon": 1 entry. - gpio-controller Boolean. Marks the device node as a GPIO controller/provider. diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt index fe1bf24104d3..4018ee57a6af 100644 --- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt @@ -17,6 +17,7 @@ Required Properties: - "renesas,gpio-r8a7796": for R8A7796 (R-Car M3-W) compatible GPIO controller. - "renesas,gpio-r8a77965": for R8A77965 (R-Car M3-N) compatible GPIO controller. - "renesas,gpio-r8a77970": for R8A77970 (R-Car V3M) compatible GPIO controller. + - "renesas,gpio-r8a77980": for R8A77980 (R-Car V3H) compatible GPIO controller. - "renesas,gpio-r8a77990": for R8A77990 (R-Car E3) compatible GPIO controller. - "renesas,gpio-r8a77995": for R8A77995 (R-Car D3) compatible GPIO controller. - "renesas,rcar-gen1-gpio": for a generic R-Car Gen1 GPIO controller. diff --git a/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.txt b/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.txt new file mode 100644 index 000000000000..f9231df17c2b --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.txt @@ -0,0 +1,32 @@ +Rockchip RK3328 GRF (General Register Files) GPIO controller. + +In Rockchip RK3328, the output only GPIO_MUTE pin, originally for codec mute +control, can also be used for general purpose. It is manipulated by the +GRF_SOC_CON10 register in GRF. Aside from the GPIO_MUTE pin, the HDMI pins can +also be set in the same way. + +Currently this GPIO controller only supports the mute pin. If needed in the +future, the HDMI pins support can also be added. + +Required properties: +- compatible: Should contain "rockchip,rk3328-grf-gpio". +- gpio-controller: Marks the device node as a gpio controller. +- #gpio-cells: Should be 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. + +Example: + + grf: syscon@ff100000 { + compatible = "rockchip,rk3328-grf", "syscon", "simple-mfd"; + + grf_gpio: grf-gpio { + compatible = "rockchip,rk3328-grf-gpio"; + gpio-controller; + #gpio-cells = <2>; + }; + }; + +Note: The grf_gpio node should be declared as the child of the GRF (General +Register File) node. The GPIO_MUTE pin is referred to as <&grf_gpio 0>. |