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-Broadcom Northstar pins mux controller
-
-Some of Northstar SoCs's pins can be used for various purposes thanks to the mux
-controller. This binding allows describing mux controller and listing available
-functions. They can be referenced later by other bindings to let system
-configure controller correctly.
-
-A list of pins varies across chipsets so few bindings are available.
-
-Node of the pinmux must be nested in the CRU (Central Resource Unit) "syscon"
-noce.
-
-Required properties:
-- compatible: must be one of:
- "brcm,bcm4708-pinmux"
- "brcm,bcm4709-pinmux"
- "brcm,bcm53012-pinmux"
-- offset: offset of pin registers in the CRU block
-
-Functions and their groups available for all chipsets:
-- "spi": "spi_grp"
-- "i2c": "i2c_grp"
-- "pwm": "pwm0_grp", "pwm1_grp", "pwm2_grp", "pwm3_grp"
-- "uart1": "uart1_grp"
-
-Additionally available on BCM4709 and BCM53012:
-- "mdio": "mdio_grp"
-- "uart2": "uart2_grp"
-- "sdio": "sdio_pwr_grp", "sdio_1p8v_grp"
-
-For documentation of subnodes see:
-Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
-
-Example:
- dmu@1800c000 {
- compatible = "simple-bus";
- ranges = <0 0x1800c000 0x1000>;
- #address-cells = <1>;
- #size-cells = <1>;
-
- cru@100 {
- compatible = "syscon", "simple-mfd";
- reg = <0x100 0x1a4>;
-
- pinctrl {
- compatible = "brcm,bcm4708-pinmux";
- offset = <0xc0>;
-
- spi-pins {
- function = "spi";
- groups = "spi_grp";
- };
- };
- };
- };