From 8bd137d4c009d0aa214b839100f905e0c2f8bd14 Mon Sep 17 00:00:00 2001 From: Paul Cercueil Date: Fri, 12 May 2017 18:52:54 +0200 Subject: [PATCH] dt/bindings: Document pinctrl-ingenic This commit adds documentation for the devicetree bindings of the pinctrl-ingenic driver, which handles pin configuration and pin muxing of the Ingenic SoCs currently supported by the Linux kernel. Signed-off-by: Paul Cercueil Acked-by: Rob Herring Signed-off-by: Linus Walleij --- .../bindings/pinctrl/ingenic,pinctrl.txt | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt diff --git a/Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt new file mode 100644 index 000000000000..ca313a7aeaff --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt @@ -0,0 +1,41 @@ +Ingenic jz47xx pin controller + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +For the jz47xx SoCs, pin control is tightly bound with GPIO ports. All pins may +be used as GPIOs, multiplexed device functions are configured within the +GPIO port configuration registers and it is typical to refer to pins using the +naming scheme "PxN" where x is a character identifying the GPIO port with +which the pin is associated and N is an integer from 0 to 31 identifying the +pin within that GPIO port. For example PA0 is the first pin in GPIO port A, and +PB31 is the last pin in GPIO port B. The jz4740 contains 4 GPIO ports, PA to +PD, for a total of 128 pins. The jz4780 contains 6 GPIO ports, PA to PF, for a +total of 192 pins. + + +Required properties: +-------------------- + + - compatible: One of: + - "ingenic,jz4740-pinctrl" + - "ingenic,jz4770-pinctrl" + - "ingenic,jz4780-pinctrl" + - reg: Address range of the pinctrl registers. + + +GPIO sub-nodes +-------------- + +The pinctrl node can have optional sub-nodes for the Ingenic GPIO driver; +please refer to ../gpio/ingenic,gpio.txt. + + +Example: +-------- + +pinctrl: pin-controller@10010000 { + compatible = "ingenic,jz4740-pinctrl"; + reg = <0x10010000 0x400>; +}; -- 2.20.1