1 * Freescale i.MX7ULP IOMUX Controller
3 i.MX 7ULP has three IOMUXC instances: IOMUXC0 for M4 ports, IOMUXC1 for A7
4 ports and IOMUXC DDR for DDR interface.
7 This binding doc is only for the IOMUXC1 support in A7 Domain and it only
8 supports generic pin config.
10 Please also refer pinctrl-bindings.txt in this directory for generic pinctrl
13 === Pin Controller Node ===
16 - compatible: "fsl,imx7ulp-iomuxc1"
17 - reg: Should contain the base physical address and size of the iomuxc
20 === Pin Configuration Node ===
21 - pinmux: One integers array, represents a group of pins mux setting.
22 The format is pinmux = <PIN_FUNC_ID>, PIN_FUNC_ID is a pin working on
25 NOTE: i.MX7ULP PIN_FUNC_ID consists of 4 integers as it shares one mux
26 and config register as follows:
27 <mux_conf_reg input_reg mux_mode input_val>
29 Refer to imx7ulp-pinfunc.h in in device tree source folder for all
30 available imx7ulp PIN_FUNC_ID.
33 - drive-strength Integer. Controls Drive Strength
36 - drive-push-pull Bool. Enable Pin Push-pull
37 - drive-open-drain Bool. Enable Pin Open-drian
38 - slew-rate: Integer. Controls Slew Rate
41 - bias-disable: Bool. Pull disabled
42 - bias-pull-down: Bool. Pull down on pin
43 - bias-pull-up: Bool. Pull up on pin
46 #include "imx7ulp-pinfunc.h"
48 /* Pin Controller Node */
49 iomuxc1: iomuxc@40ac0000 {
50 compatible = "fsl,imx7ulp-iomuxc1";
51 reg = <0x40ac0000 0x1000>;
53 /* Pin Configuration Node */
54 pinctrl_lpuart4: lpuart4grp {
56 IMX7ULP_PAD_PTC3__LPUART4_RX
57 IMX7ULP_PAD_PTC2__LPUART4_TX