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1Broadcom NSP (Northstar plus) IOMUX Controller2 3The NSP IOMUX controller supports group based mux configuration. In4addition, certain pins can be muxed to GPIO function individually.5 6Required properties:7- compatible:8 Must be "brcm,nsp-pinmux"9 10- reg:11 Should contain the register physical address and length for each of12 GPIO_CONTROL0, GP_AUX_SEL and IPROC_CONFIG IOMUX registers13 14Properties in subnodes:15- function:16 The mux function to select17 18- groups:19 The list of groups to select with a given function20 21For more details, refer to22Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt23 24For example:25 26 pinmux: pinmux@1803f1c0 {27 compatible = "brcm,nsp-pinmux";28 reg = <0x1803f1c0 0x04>,29 <0x18030028 0x04>,30 <0x1803f408 0x04>;31 32 pinctrl-names = "default";33 pinctrl-0 = <&pwm>, <&gpio_b>, <&nand_sel>;34 35 pwm: pwm {36 function = "pwm";37 groups = "pwm0_grp", "pwm1_grp";38 };39 40 gpio_b: gpio_b {41 function = "gpio_b";42 groups = "gpio_b_0_grp", "gpio_b_1_grp";43 };44 45 nand_sel: nand_sel {46 function = "nand";47 groups = "nand_grp";48 };49 };50 51List of supported functions and groups in Northstar Plus:52 53"spi": "spi_grp"54 55"i2c": "i2c_grp"56 57"mdio": "mdio_grp"58 59"pwm": "pwm0_grp", "pwm1_grp", "pwm2_grp", "pwm3_grp"60 61"gpio_b": "gpio_b_0_grp", "gpio_b_1_grp", "gpio_b_2_grp", "gpio_b_3_grp"62 63"uart1": "uart1_grp"64 65"uart2": "uart2_grp"66 67"synce": "synce_grp"68 69"sata_led_grps": "sata0_led_grp", "sata1_led_grp"70 71"xtal_out": "xtal_out_grp"72 73"sdio": "sdio_pwr_grp", "sdio_1p8v_grp"74 75"switch_led": "switch_p05_led0_grp", "switch_p05_led1_grp"76 77"nand": "nand_grp"78 79"emmc": "emmc_grp"80