From 159f8a0209aff155af7f6fcdedd4a4484dd19c23 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Tue, 21 May 2013 13:40:06 +0200 Subject: gpio-rcar: Add DT support Add DT bindings for the gpio-rcar driver and read the device configuration from the DT node at probe time if available. Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Laurent Pinchart Signed-off-by: Simon Horman --- .../devicetree/bindings/gpio/renesas,gpio-rcar.txt | 52 ++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt (limited to 'Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt') diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt new file mode 100644 index 000000000000..46d76a004246 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt @@ -0,0 +1,52 @@ +* Renesas R-Car GPIO Controller + +Required Properties: + + - compatible: should be one of the following. + - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO controller. + - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO controller. + - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO controller. + - "renesas,gpio-rcar": for generic R-Car GPIO controller. + + - reg: Base address and length of each memory resource used by the GPIO + controller hardware module. + + - interrupt-parent: phandle of the parent interrupt controller. + - interrupts: Interrupt specifier for the controllers interrupt. + + - gpio-controller: Marks the device node as a gpio controller. + - #gpio-cells: Should be 2. The first cell is the GPIO number and the second + cell is used to specify optional parameters as bit flags. Only the GPIO + active low flag (bit 0) is currently supported. + - gpio-ranges: Range of pins managed by the GPIO controller as a 4-cells + tuple using the following syntax. + + <[phandle of the pin controller node] + 0 + [index of the first pin] + [number of pins]> + +Please refer to gpio.txt in this directory for details of the common GPIO +bindings used by client devices. + +Example: R8A7779 (R-Car H1) GPIO controller nodes + + gpio0: gpio@ffc40000 { + compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar"; + reg = <0xffc40000 0x2c>; + interrupt-parent = <&gic>; + interrupts = <0 141 0x4>; + #gpio-cells = <2>; + gpio-controller; + gpio-ranges = <&pfc 0 0 32>; + }; + ... + gpio6: gpio@ffc46000 { + compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar"; + reg = <0xffc46000 0x2c>; + interrupt-parent = <&gic>; + interrupts = <0 147 0x4>; + #gpio-cells = <2>; + gpio-controller; + gpio-ranges = <&pfc 0 192 9>; + }; -- cgit v1.2.3 From b559c3e8e7ca469921987925baf892ab2038396e Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Tue, 18 Jun 2013 12:29:48 +0200 Subject: gpio-rcar: Reference core gpio documentation in the DT bindings Replaced the detailed gpio-ranges documentation with a reference to the code gpio DT bindings, and mention the gpio flags symbolic names. Signed-off-by: Laurent Pinchart Signed-off-by: Simon Horman --- .../devicetree/bindings/gpio/renesas,gpio-rcar.txt | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) (limited to 'Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt') diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt index 46d76a004246..cb3dc7bcd8e6 100644 --- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt @@ -16,18 +16,12 @@ Required Properties: - gpio-controller: Marks the device node as a gpio controller. - #gpio-cells: Should be 2. The first cell is the GPIO number and the second - cell is used to specify optional parameters as bit flags. Only the GPIO - active low flag (bit 0) is currently supported. - - gpio-ranges: Range of pins managed by the GPIO controller as a 4-cells - tuple using the following syntax. - - <[phandle of the pin controller node] - 0 - [index of the first pin] - [number of pins]> - -Please refer to gpio.txt in this directory for details of the common GPIO -bindings used by client devices. + cell specifies GPIO flags, as defined in . Only the + GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. + - gpio-ranges: Range of pins managed by the GPIO controller. + +Please refer to gpio.txt in this directory for details of gpio-ranges property +and the common GPIO bindings used by client devices. Example: R8A7779 (R-Car H1) GPIO controller nodes -- cgit v1.2.3