brcm,bcm4708-pinmux.txt

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    1 Broadcom Northstar pins mux controller
    2 
    3 Some of Northstar SoCs's pins can be used for various purposes thanks to the mux
    4 controller. This binding allows describing mux controller and listing available
    5 functions. They can be referenced later by other bindings to let system
    6 configure controller correctly.
    7 
    8 A list of pins varies across chipsets so few bindings are available.
    9 
   10 Node of the pinmux must be nested in the CRU (Central Resource Unit) "syscon"
   11 noce.
   12 
   13 Required properties:
   14 - compatible: must be one of:
   15         "brcm,bcm4708-pinmux"
   16         "brcm,bcm4709-pinmux"
   17         "brcm,bcm53012-pinmux"
   18 - offset: offset of pin registers in the CRU block
   19 
   20 Functions and their groups available for all chipsets:
   21 - "spi": "spi_grp"
   22 - "i2c": "i2c_grp"
   23 - "pwm": "pwm0_grp", "pwm1_grp", "pwm2_grp", "pwm3_grp"
   24 - "uart1": "uart1_grp"
   25 
   26 Additionally available on BCM4709 and BCM53012:
   27 - "mdio": "mdio_grp"
   28 - "uart2": "uart2_grp"
   29 - "sdio": "sdio_pwr_grp", "sdio_1p8v_grp"
   30 
   31 For documentation of subnodes see:
   32 Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
   33 
   34 Example:
   35         dmu@1800c000 {
   36                 compatible = "simple-bus";
   37                 ranges = <0 0x1800c000 0x1000>;
   38                 #address-cells = <1>;
   39                 #size-cells = <1>;
   40 
   41                 cru@100 {
   42                         compatible = "syscon", "simple-mfd";
   43                         reg = <0x100 0x1a4>;
   44 
   45                         pinctrl {
   46                                 compatible = "brcm,bcm4708-pinmux";
   47                                 offset = <0xc0>;
   48 
   49                                 spi-pins {
   50                                         function = "spi";
   51                                         groups = "spi_grp";
   52                                 };
   53                         };
   54                 };
   55         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/pinctrl/brcm,bcm4708-pinmux.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pinctrl/brcm,bcm4708-pinmux.txt