arm64: dts: imx8mp-tqma8mpql: fix LDO5 power off

Fix SD card removal caused by automatic LDO5 power off after boot:

LDO5: disabling
mmc1: card 59b4 removed
EXT4-fs (mmcblk1p2): shut down requested (2)
Aborting journal on device mmcblk1p2-8.
JBD2: I/O error when updating journal superblock for mmcblk1p2-8.

To prevent this, add vqmmc regulator for USDHC, using a GPIO-controlled
regulator that is supplied by LDO5. Since this is implemented on SoM but
used on baseboards with SD-card interface, implement the functionality
on SoM part and optionally enable it on baseboards if needed.

Fixes: 418d1d8 ("arm64: dts: freescale: add initial device tree for TQMa8MPQL with i.MX8MP")
Signed-off-by: Markus Niebel <[email protected]>
Signed-off-by: Alexander Stein <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>

Author: tq-niebelm

arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mp-ras314.dts

@@ -467,6 +467,10 @@
 	status = "okay";
 };
 
+&reg_usdhc2_vqmmc {
+	status = "okay";
+};
+
 &sai5 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sai5>;
@@ -876,8 +880,7 @@
 			   <MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0	0x1d2>,
 			   <MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1	0x1d2>,
 			   <MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2	0x1d2>,
-			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d2>,
-			   <MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT	0xc0>;
+			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d2>;
 	};
 
 	pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
@@ -886,8 +889,7 @@
 			   <MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2	0x1d4>,
-			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>,
-			   <MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT	0xc0>;
+			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>;
 	};
 
 	pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
@@ -896,8 +898,7 @@
 			   <MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2	0x1d4>,
-			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>,
-			   <MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT	0xc0>;
+			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>;
 	};
 
 	pinctrl_usdhc2_gpio: usdhc2-gpiogrp {

arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mpxl.dts

@@ -604,6 +604,10 @@
 	status = "okay";
 };
 
+&reg_usdhc2_vqmmc {
+	status = "okay";
+};
+
 &sai3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sai3>;
@@ -983,8 +987,7 @@
 			   <MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0	0x1d2>,
 			   <MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1	0x1d2>,
 			   <MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2	0x1d2>,
-			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d2>,
-			   <MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT	0xc0>;
+			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d2>;
 	};
 
 	pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
@@ -993,8 +996,7 @@
 			   <MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2	0x1d4>,
-			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>,
-			   <MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT	0xc0>;
+			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>;
 	};
 
 	pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
@@ -1003,8 +1005,7 @@
 			   <MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1	0x1d4>,
 			   <MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2	0x1d4>,
-			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>,
-			   <MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT	0xc0>;
+			   <MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3	0x1d4>;
 	};
 
 	pinctrl_usdhc2_gpio: usdhc2-gpiogrp {

arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql.dtsi

@@ -24,6 +24,20 @@
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
 	};
+
+	reg_usdhc2_vqmmc: regulator-usdhc2-vqmmc {
+		compatible = "regulator-gpio";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_reg_usdhc2_vqmmc>;
+		regulator-name = "V_SD2";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x1>,
+			 <3300000 0x0>;
+		vin-supply = <&ldo5_reg>;
+		status = "disabled";
+	};
 };
 
 &A53_0 {
@@ -184,6 +198,10 @@
 	};
 };
 
+&usdhc2 {
+	vqmmc-supply = <&reg_usdhc2_vqmmc>;
+};
+
 &usdhc3 {
 	pinctrl-names = "default", "state_100mhz", "state_200mhz";
 	pinctrl-0 = <&pinctrl_usdhc3>;
@@ -233,6 +251,10 @@
 		fsl,pins = <MX8MP_IOMUXC_SD2_RESET_B__GPIO2_IO19	0x10>;
 	};
 
+	pinctrl_reg_usdhc2_vqmmc: regusdhc2vqmmcgrp {
+		fsl,pins = <MX8MP_IOMUXC_GPIO1_IO04__GPIO1_IO04		0xc0>;
+	};
+
 	pinctrl_usdhc3: usdhc3grp {
 		fsl,pins = <MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK		0x194>,
 			   <MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD		0x1d4>,