Broadcom Cygnus IOMUX Controller The Cygnus IOMUX controller supports group based mux configuration. In addition, certain pins can be muxed to GPIO function individually. Required properties: - compatible: Must be "brcm,cygnus-pinmux" - reg: Define the base and range of the I/O address space that contains the Cygnus IOMUX registers Properties in subnodes: - function: The mux function to select - groups: The list of groups to select with a given function For more details, refer to Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt For example: pinmux: pinmux@0301d0c8 { compatible = "brcm,cygnus-pinmux"; reg = <0x0301d0c8 0x1b0>; pinctrl-names = "default"; pinctrl-0 = <&i2s0_default>; i2s0_default: i2s0_default { mux { function = "i2s0"; groups = "i2s0_0_grp", "i2s0_1_grp"; }; }; }; List of supported functions and groups in Cygnus: "i2s0": "i2s0_0_grp", "i2s0_1_grp" "i2s1": "i2s1_0_grp", "i2s1_1_grp" "i2s2": "i2s2_0_grp", "i2s2_1_grp", "i2s2_2_grp", "i2s2_3_grp", "i2s2_4_grp" "spdif": "spdif_grp" "pwm0": "pwm0_grp" "pwm1": "pwm1_grp" "pwm2": "pwm2_grp" "pwm3": "pwm3_grp" "pwm4": "pwm4_grp" "pwm5": "pwm5_grp" "key": "key0_grp", "key1_grp", "key2_grp", "key3_grp", "key4_grp", "key5_grp", "key6_grp", "key7_grp", "key8_grp", "key9_grp", "key10_grp", "key11_grp", "key12_grp", "key13_grp", "key14_grp", "key15_grp" "audio_dte": "audio_dte0_grp", "audio_dte1_grp", "audio_dte2_grp", "audio_dte3_grp" "smart_card0": "smart_card0_grp", "smart_card0_fcb_grp" "smart_card1": "smart_card1_grp", "smart_card1_fcb_grp" "spi0": "spi0_grp" "spi1": "spi1_grp" "spi2": "spi2_grp" "spi3": "spi3_grp" "spi4": "spi4_0_grp", "spi4_1_grp" "spi5": "spi5_grp" "sw_led0": "sw_led0_0_grp", "sw_led0_1_grp" "sw_led1": "sw_led1_grp" "sw_led2": "sw_led2_0_grp", "sw_led2_1_grp" "d1w": "d1w_grp" "lcd": "lcd_grp" "sram": "sram_0_grp", "sram_1_grp" "uart0": "uart0_grp" "uart1": "uart1_grp", "uart1_dte_grp" "uart2": "uart2_grp" "uart3": "uart3_grp" "uart4": "uart4_grp" "qspi": "qspi_0_grp", "qspi_1_grp" "nand": "nand_grp" "sdio0": "sdio0_grp", "sdio0_cd_grp", "sdio0_mmc_grp" "sdio1": "sdio1_data_0_grp", "sdio1_data_1_grp", "sdio1_cd_grp", "sdio1_led_grp", "sdio1_mmc_grp" "can0": "can0_grp" "can1": "can1_grp" "cam": "cam_led_grp", "cam_0_grp", "cam_1_grp" "bsc1": "bsc1_grp" "pcie_clkreq": "pcie_clkreq_grp" "usb0_oc": "usb0_oc_grp" "usb1_oc": "usb1_oc_grp" "usb2_oc": "usb2_oc_grp"