arm64: dts: imx943-evk: add usdhc3 for SDIO WiFi support

Add usdhc3 to support M.2 SDIO WiFi on i.MX943 EVK board.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
index f54404c9bfc9314001ff9a28290ed823c4df60b5..c8ceabe3d92399cd9eaf91b8ce373cd6a5f3aace 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
@@ -20,6 +20,7 @@
                i2c5 = &lpi2c6;
                mmc0 = &usdhc1;
                mmc1 = &usdhc2;
+               mmc2 = &usdhc3;
                serial0 = &lpuart1;
                serial5 = &lpuart6;
        };
@@ -54,6 +55,32 @@
                #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 = <&reg_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 @@
                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 @@
                >;
        };
 
+       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 @@
        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 = <&reg_m2_wlan>;
+       mmc-pwrseq = <&usdhc3_pwrseq>;
+       keep-power-in-suspend;
+       non-removable;
+       wakeup-source;
+       status = "okay";
+};
+
 &wdog3 {
        fsl,ext-reset-output;
        status = "okay";