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Broadcom NSP (Northstar plus) IOMUX Controller
The NSP IOMUX controller supports group based mux configuration. In
addition, certain pins can be muxed to GPIO function individually.
Required properties:
- compatible:
Must be "brcm,nsp-pinmux"
- reg:
Should contain the register physical address and length for each of
GPIO_CONTROL0, GP_AUX_SEL and IPROC_CONFIG 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@1803f1c0 {
compatible = "brcm,nsp-pinmux";
reg = <0x1803f1c0 0x04>,
<0x18030028 0x04>,
<0x1803f408 0x04>;
pinctrl-names = "default";
pinctrl-0 = <&pwm &gpio_b &nand_sel>;
pwm: pwm {
function = "pwm";
groups = "pwm0_grp", "pwm1_grp";
};
gpio_b: gpio_b {
function = "gpio_b";
groups = "gpio_b_0_grp", "gpio_b_1_grp";
};
nand_sel: nand_sel {
function = "nand";
groups = "nand_grp";
};
};
List of supported functions and groups in Northstar Plus:
"spi": "spi_grp"
"i2c": "i2c_grp"
"mdio": "mdio_grp"
"pwm": "pwm0_grp", "pwm1_grp", "pwm2_grp", "pwm3_grp"
"gpio_b": "gpio_b_0_grp", "gpio_b_1_grp", "gpio_b_2_grp", "gpio_b_3_grp"
"uart1": "uart1_grp"
"uart2": "uart2_grp"
"synce": "synce_grp"
"sata_led_grps": "sata0_led_grp", "sata1_led_grp"
"xtal_out": "xtal_out_grp"
"sdio": "sdio_pwr_grp", "sdio_1p8v_grp"
"switch_led": "switch_p05_led0_grp", "switch_p05_led1_grp"
"nand": "nand_grp"
"emmc": "emmc_grp"
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