1Broadcom NSP (Northstar plus) IOMUX Controller 2 3The NSP IOMUX controller supports group based mux configuration. In 4addition, 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 of 12 GPIO_CONTROL0, GP_AUX_SEL and IPROC_CONFIG IOMUX registers 13 14Properties in subnodes: 15- function: 16 The mux function to select 17 18- groups: 19 The list of groups to select with a given function 20 21For more details, refer to 22Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt 23 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