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| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/fsl,imx7ulp-pinctrl.txt | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx7ulp-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/fsl,imx7ulp-pinctrl.txt new file mode 100644 index 000000000..bfa3703a7 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/fsl,imx7ulp-pinctrl.txt @@ -0,0 +1,53 @@ +* Freescale i.MX7ULP IOMUX Controller + +i.MX 7ULP has three IOMUXC instances: IOMUXC0 for M4 ports, IOMUXC1 for A7 +ports and IOMUXC DDR for DDR interface. + +Note: +This binding doc is only for the IOMUXC1 support in A7 Domain and it only +supports generic pin config. + +Please refer to fsl,imx-pinctrl.txt in this directory for common binding +part and usage. + +Required properties: +- compatible: "fsl,imx7ulp-iomuxc1". +- fsl,pins: Each entry consists of 5 integers which represents the mux + and config setting for one pin. The first 4 integers + <mux_conf_reg input_reg mux_mode input_val> are specified + using a PIN_FUNC_ID macro, which can be found in + imx7ulp-pinfunc.h in the device tree source folder. + The last integer CONFIG is the pad setting value like + pull-up on this pin. + + Please refer to i.MX7ULP Reference Manual for detailed + CONFIG settings. + +CONFIG bits definition: +PAD_CTL_OBE (1 << 17) +PAD_CTL_IBE (1 << 16) +PAD_CTL_LK (1 << 16) +PAD_CTL_DSE_HI (1 << 6) +PAD_CTL_DSE_STD (0 << 6) +PAD_CTL_ODE (1 << 5) +PAD_CTL_PUSH_PULL (0 << 5) +PAD_CTL_SRE_SLOW (1 << 2) +PAD_CTL_SRE_STD (0 << 2) +PAD_CTL_PE (1 << 0) + +Examples: +#include "imx7ulp-pinfunc.h" + +/* Pin Controller Node */ +iomuxc1: pinctrl@40ac0000 { + compatible = "fsl,imx7ulp-iomuxc1"; + reg = <0x40ac0000 0x1000>; + + /* Pin Configuration Node */ + pinctrl_lpuart4: lpuart4grp { + fsl,pins = < + IMX7ULP_PAD_PTC3__LPUART4_RX 0x1 + IMX7ULP_PAD_PTC2__LPUART4_TX 0x1 + >; + }; +}; |