[PATCH V2] arm64: dts: imx943-evk: add usdhc3 for SDIO WiFi support
From: Sherry Sun <hidden>
Date: 2026-02-04 02:21:57
Also in:
imx, linux-arm-kernel, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
Add usdhc3 to support M.2 SDIO WiFi on i.MX943 EVK board. Signed-off-by: Sherry Sun <redacted> --- Changes in V2: 1. Move the usdhc3_pwrseq node before memory@80000000 node. 2. Remove redundant blank lines. --- arch/arm64/boot/dts/freescale/imx943-evk.dts | 61 ++++++++++++++++++++ 1 file changed, 61 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
index f54404c9bfc9..c8ceabe3d923 100644
--- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts@@ -20,6 +20,7 @@ aliases { i2c5 = &lpi2c6; mmc0 = &usdhc1; mmc1 = &usdhc2; + mmc2 = &usdhc3; serial0 = &lpuart1; serial5 = &lpuart6; };
@@ -54,6 +55,32 @@ dmic: dmic { #sound-dai-cells = <0>; }; + reg_m2_pwr: regulator-m2-pwr { + compatible = "regulator-fixed"; + regulator-name = "M.2-power"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + gpio = <&pcal6416_i2c3_u46 2 GPIO_ACTIVE_HIGH>; + enable-active-high; + /* + * M.2 device only can be enabled(W_DISABLE1#) after all Power + * Rails reach their minimum operating voltage (PCI Express M.2 + * Specification r5.1 3.1.4 Power-up Timing). + * Set a delay equal to the max value of Tsettle here. + */ + startup-delay-us = <5000>; + }; + + reg_m2_wlan: regulator-wlan { + compatible = "regulator-fixed"; + regulator-name = "WLAN_EN"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + vin-supply = <®_m2_pwr>; + gpio = <&pcal6416_i2c3_u46 5 GPIO_ACTIVE_HIGH>; + enable-active-high; + }; + reg_usdhc2_vmmc: regulator-usdhc2 { compatible = "regulator-fixed"; off-on-delay-us = <12000>;
@@ -141,6 +168,11 @@ sound-wm8962 { model = "wm8962-audio"; }; + usdhc3_pwrseq: usdhc3_pwrseq { + compatible = "mmc-pwrseq-simple"; + reset-gpios = <&pcal6416_i2c3_u46 4 GPIO_ACTIVE_LOW>; + }; + memory@80000000 { reg = <0x0 0x80000000 0x0 0x80000000>; device_type = "memory";
@@ -760,6 +792,18 @@ IMX94_PAD_SD2_RESET_B__GPIO4_IO27 0x31e >; }; + pinctrl_usdhc3: usdhc3grp { + fsl,pins = < + IMX94_PAD_GPIO_IO48__USDHC3_CLK 0x158e + /* Need to config the SION for CMD pad, refer to ERR053138 */ + IMX94_PAD_GPIO_IO49__USDHC3_CMD 0x4000138e + IMX94_PAD_GPIO_IO50__USDHC3_DATA0 0x138e + IMX94_PAD_GPIO_IO51__USDHC3_DATA1 0x138e + IMX94_PAD_GPIO_IO52__USDHC3_DATA2 0x138e + IMX94_PAD_GPIO_IO53__USDHC3_DATA3 0x138e + >; + }; + pinctrl_xspi1: xspi1grp { fsl,pins = < IMX94_PAD_XSPI1_SCLK__XSPI1_A_SCLK 0x3fe
@@ -802,6 +846,23 @@ &usdhc2 { status = "okay"; }; +&usdhc3 { + /* + * Only enable SDIO2.0 mode as the corresponding GPIO pads are 3.3V, the + * max frequency is 50MHz. + */ + pinctrl-0 = <&pinctrl_usdhc3>; + pinctrl-1 = <&pinctrl_usdhc3>; + pinctrl-names = "default", "sleep"; + bus-width = <4>; + vmmc-supply = <®_m2_wlan>; + mmc-pwrseq = <&usdhc3_pwrseq>; + keep-power-in-suspend; + non-removable; + wakeup-source; + status = "okay"; +}; + &wdog3 { fsl,ext-reset-output; status = "okay";
--
2.37.1