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Signed-off-by: Bai Ping --- changes v2-v3: - add generic config binding change v3->v4: - add SION bit define - fix typo - move the pin header file to dts patch. --- .../bindings/pinctrl/fsl,imx6sll-pinctrl.txt | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/fsl,imx6sll-pinctrl.txt diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx6sll-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/fsl,imx6sll-pinctrl.txt new file mode 100644 index 0000000..b830a86 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/fsl,imx6sll-pinctrl.txt @@ -0,0 +1,71 @@ +* Freescale i.MX6 SLL IOMUX Controller + +Please refer to the pinctrl-bindings.txt in this directory for generic pinctrl binding. + +=== Pin Controller Node === + +Required properties: +- compatible: "fsl,imx6sll-iomuxc" +- reg: Should contain the base physical address and size of the iomuxc registers. + + +=== Pin Configuration Node === +- pinmux: One integers array, represents a group of pins mux setting. + The format is pinmux = , PIN_FUNC_ID is a pin working on + a specific function. which can be found in imx6sll-pinfunc.h under device + tree source folder. Please also refer to i.MX6SLL Reference Manual for detailed + CONFIG settings. + +Optional Properties: +- drive-strength Integer. Controls Drive Strength + 0: HI-Z + 1: 260 ohm@3.3v, 150 ohm@1.8v + 2: 130 ohm@3.3v, 75 ohm@1.8v + 3: 86 ohm@3.3v, 50 ohm@1.8v + 4: 65 ohm@3.3v, 37 ohm@1.8v + 5: 52 ohm@3.3v, 30 ohm@1.8v + 6: 43 ohm@3.3v, 25 ohm@1.8v + 7: 37 ohm@3.3v, 21 ohm@1.8v +- drive-open-drain Bool. Enable Pin Open-drian +- slew-rate: Integer. Controls Slew Rate + 0: slow + 1: fast +- fsl,pin-speed: Integer, Controls the pin speed + 0: reserverd + 1: low(50 MHz) + 2: medium(100 MHz) + 3: maximum(200 MHz) + +- bias-pull-down: Integer. Pull down on pin + 0: 100K ohm pull down +- bias-pull-up: Integer. Pull up on pin + 1: 47K ohm pull up + 2: 100K ohm pull up + 3: 22K ohm pull up +- input-schmitt-enable: bool, Schmitt trigger input enable +- input-enable bool, Software input on enbale +- fsl,low-voltage-enable: Integer. low voltage enable + 0: High voltage + 1: Low voltage +Examples: +#include "imx6sll-pinfunc.h" + +/* Pin Controller Node */ + +iomuxc: iomuxc@020e0000 { + compatible = "fsl,imx6sll-iomuxc"; + reg = <0x020e0000 0x4000>; + + /* Pin configuration Node */ + pinctrl_uart1: uart1grp { + pinmux = < + MX6SLL_PAD_UART1_TXD__UART1_DCE_TX + MX6SLL_PAD_UART1_RXD__UART1_DCE_RX + >; + slew-rate = <0x1>; + drive-strength = <0x6>; + fsl,pin-speed = <0x2>; + bias-pull-up = <0x2>; + input-schmitt-enable; + }; +};