imx8mp: verdin: Convert to DM_PMIC

Convert the board to use DM_PMIC instead of the legacy SPL I2C/PMIC
handling.

Changes include:
- Enable DM_PMIC, DM_PMIC_PCA9450, and SPL_DM_PMIC_PCA9450 in defconfig.
- Drop legacy SPL I2C and PMIC options.
- Remove manual I2C1 pad setup and legacy power_pca9450_init() usage.
- Use DM-based pmic_get() with the DT node "pmic@25".
- Update PMIC register programming to use struct udevice API.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Tested-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi

@@ -70,7 +70,7 @@
 };
 
 &i2c1 {
-	bootph-pre-ram;
+	bootph-all;
 
 	eeprom_module: eeprom@50 {
 		compatible = "i2c-eeprom";
@@ -104,7 +104,7 @@
 };
 
 &pca9450 {
-	bootph-pre-ram;
+	bootph-all;
 };
 
 &pinctrl_ctrl_sleep_moci {
@@ -112,7 +112,11 @@
 };
 
 &pinctrl_i2c1 {
-	bootph-pre-ram;
+	bootph-all;
+};
+
+&pinctrl_pmic {
+	bootph-all;
 };
 
 &pinctrl_usdhc2_pwr_en {
@@ -159,6 +163,12 @@
 	sd-uhs-ddr50;
 	sd-uhs-sdr104;
 	bootph-pre-ram;
+	/*
+	 * LDO5 output depends on SD2_VSEL, but no way to read back SD2_VSEL
+	 * when using SDHC controller VSELECT to control SD2_VSEL. So drop
+	 * vqmmc-supply to avoid fsl_esdhc_imx read back wrong voltage.
+	 */
+	 /delete-property/ vqmmc-supply;
 };
 
 &usdhc3 {
@@ -173,3 +183,7 @@
 &wdog1 {
 	bootph-pre-ram;
 };
+
+&{/soc@0/bus@30800000/i2c@30a20000/pmic@25/regulators} {
+	bootph-all;
+};

board/toradex/verdin-imx8mp/spl.c

@@ -8,12 +8,8 @@
 #include <log.h>
 #include <spl.h>
 #include <asm/arch/clock.h>
-#include <asm/arch/imx8mp_pins.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/mach-imx/boot_mode.h>
-#include <asm/mach-imx/gpio.h>
-#include <asm/mach-imx/iomux-v3.h>
-#include <asm/mach-imx/mxc_i2c.h>
 #include <asm/arch/ddr.h>
 #include <dm/device.h>
 #include <dm/uclass.h>
@@ -68,36 +64,21 @@ void spl_board_init(void)
 	puts("Normal Boot\n");
 }
 
-#define I2C_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | PAD_CTL_PE)
-#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
-struct i2c_pads_info i2c_pad_info1 = {
-	.scl = {
-		.i2c_mode = MX8MP_PAD_I2C1_SCL__I2C1_SCL | PC,
-		.gpio_mode = MX8MP_PAD_I2C1_SCL__GPIO5_IO14 | PC,
-		.gp = IMX_GPIO_NR(5, 14),
-	},
-	.sda = {
-		.i2c_mode = MX8MP_PAD_I2C1_SDA__I2C1_SDA | PC,
-		.gpio_mode = MX8MP_PAD_I2C1_SDA__GPIO5_IO15 | PC,
-		.gp = IMX_GPIO_NR(5, 15),
-	},
-};
-
-#if CONFIG_IS_ENABLED(POWER_LEGACY)
-#define I2C_PMIC	0
 int power_init_board(void)
 {
-	struct pmic *p;
+	struct udevice *dev;
 	int ret;
 
-	ret = power_pca9450_init(I2C_PMIC, 0x25);
-	if (ret)
-		printf("power init failed\n");
-	p = pmic_get("PCA9450");
-	pmic_probe(p);
+	ret = pmic_get("pmic@25", &dev);
+	if (ret == -ENODEV) {
+		puts("No pmic@25\n");
+		return 0;
+	}
+	if (ret < 0)
+		return ret;
 
 	/* BUCKxOUT_DVS0/1 control BUCK123 output */
-	pmic_reg_write(p, PCA9450_BUCK123_DVS, 0x29);
+	pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
 
 	/*
 	 * increase VDD_SOC to typical value 0.95V before first
@@ -107,23 +88,22 @@ int power_init_board(void)
 	 */
 	if (IS_ENABLED(CONFIG_IMX8M_VDD_SOC_850MV))
 		/* set DVS0 to 0.85v for special case */
-		pmic_reg_write(p, PCA9450_BUCK1OUT_DVS0, 0x14);
+		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x14);
 	else
-		pmic_reg_write(p, PCA9450_BUCK1OUT_DVS0, 0x1c);
-	pmic_reg_write(p, PCA9450_BUCK1OUT_DVS1, 0x14);
-	pmic_reg_write(p, PCA9450_BUCK1CTRL, 0x59);
+		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x1c);
+	pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x14);
+	pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);
 
 	/* Kernel uses OD/OD freq for SoC */
 	/* To avoid timing risk from SoC to ARM, increase VDD_ARM to OD voltage 0.95v */
-	pmic_reg_write(p, PCA9450_BUCK2OUT_DVS0, 0x1c);
+	pmic_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x1c);
 
 	/* set LDO4 and CONFIG2 to enable the I2C level translator */
-	pmic_reg_write(p, PCA9450_LDO4CTRL, 0x59);
-	pmic_reg_write(p, PCA9450_CONFIG2, 0x1);
+	pmic_reg_write(dev, PCA9450_LDO4CTRL, 0x59);
+	pmic_reg_write(dev, PCA9450_CONFIG2, 0x1);
 
 	return 0;
 }
-#endif
 
 #if IS_ENABLED(CONFIG_SPL_LOAD_FIT)
 int board_fit_config_name_match(const char *name)
@@ -156,9 +136,6 @@ void board_init_f(ulong dummy)
 
 	enable_tzc380();
 
-	/* Adjust PMIC voltage to 1.0V for 800 MHz */
-	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
-
 	/* PMIC initialization */
 	power_init_board();
 

configs/verdin-imx8mp_defconfig

@@ -7,10 +7,6 @@ CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_OFFSET=0xFFFFDE00
-CONFIG_SYS_I2C_MXC_I2C1=y
-CONFIG_SYS_I2C_MXC_I2C2=y
-CONFIG_SYS_I2C_MXC_I2C3=y
-CONFIG_SYS_I2C_MXC_I2C4=y
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="freescale/imx8mp-verdin-wifi-dev"
 CONFIG_TARGET_VERDIN_IMX8MP=y
@@ -119,8 +115,6 @@ CONFIG_SPL_GPIO_HOG=y
 CONFIG_MXC_GPIO=y
 CONFIG_DM_PCA953X=y
 CONFIG_DM_I2C=y
-# CONFIG_SPL_DM_I2C is not set
-CONFIG_SPL_SYS_I2C_LEGACY=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
 CONFIG_I2C_EEPROM=y
@@ -152,14 +146,15 @@ CONFIG_PHY_IMX8M_PCIE=y
 CONFIG_PINCTRL=y
 CONFIG_SPL_PINCTRL=y
 CONFIG_PINCTRL_IMX8M=y
-CONFIG_SPL_POWER_LEGACY=y
 CONFIG_POWER_DOMAIN=y
 CONFIG_IMX8M_POWER_DOMAIN=y
 CONFIG_IMX8MP_HSIOMIX_BLKCTRL=y
-CONFIG_POWER_PCA9450=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_PMIC_PCA9450=y
+CONFIG_SPL_DM_PMIC_PCA9450=y
+CONFIG_DM_REGULATOR_PCA9450=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
-CONFIG_SPL_POWER_I2C=y
 CONFIG_DM_RNG=y
 CONFIG_DM_SERIAL=y
 CONFIG_MXC_UART=y