[PATCH 18/21] imx93_evk: spl: update pmic settings

[Peng Fan (OSS)]

From: Peng Fan <peng.fan at nxp.com>

1. Use runtime voltage selection for LD/OD/ND mode.
2. According to latest PE/TE report, the voltages of VDD_SOC for
   LD and ND mode need add 50mv margin, so LD voltage is 0.75v->0.8v,
   ND voltage is 0.8v->0.85v.
3. Use TOFF_DEB to differentiate new trimmed pmic and old pmic

Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 board/freescale/imx93_evk/spl.c | 42 +++++++++++++++++++++++++++++++----------
 include/power/pca9450.h         |  2 ++
 2 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/board/freescale/imx93_evk/spl.c b/board/freescale/imx93_evk/spl.c
index 2ad7489ada7..503286ce3af 100644
--- a/board/freescale/imx93_evk/spl.c
+++ b/board/freescale/imx93_evk/spl.c
@@ -62,6 +62,7 @@ int power_init_board(void)
 {
 	struct udevice *dev;
 	int ret;
+	unsigned int val = 0, buck_val;
 
 	ret = pmic_get("pmic at 25", &dev);
 	if (ret == -ENODEV) {
@@ -77,20 +78,41 @@ int power_init_board(void)
 	/* enable DVS control through PMIC_STBY_REQ */
 	pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);
 
-	if (is_voltage_mode(VOLT_LOW_DRIVE))
-		/* 0.75v for Low drive mode
-		 */
-		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x0c);
-		pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, 0x0c);
+	ret = pmic_reg_read(dev, PCA9450_PWR_CTRL);
+	if (ret < 0)
+		return ret;
+
+	val = ret;
+
+	if (is_voltage_mode(VOLT_LOW_DRIVE)) {
+		buck_val = 0x0c; /* 0.8v for Low drive mode */
+		printf("PMIC: Low Drive Voltage Mode\n");
+	} else if (is_voltage_mode(VOLT_NOMINAL_DRIVE)) {
+		buck_val = 0x10; /* 0.85v for Nominal drive mode */
+		printf("PMIC: Nominal Voltage Mode\n");
+	} else {
+		buck_val = 0x14; /* 0.9v for Over drive mode */
+		printf("PMIC: Over Drive Voltage Mode\n");
+	}
+
+	if (val & PCA9450_REG_PWRCTRL_TOFF_DEB) {
+		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, buck_val);
+		pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, buck_val);
 	} else {
-		/* 0.9v for Over drive mode
-		 */
-		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x18);
-		pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, 0x18);
+		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, buck_val + 0x4);
+		pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, buck_val + 0x4);
+	}
+
+	if (IS_ENABLED(CONFIG_IMX93_EVK_LPDDR4X)) {
+		/* Set VDDQ to 1.1V from buck2 */
+		pmic_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x28);
 	}
 
 	/* set standby voltage to 0.65v */
-	pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x4);
+	if (val & PCA9450_REG_PWRCTRL_TOFF_DEB)
+		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x0);
+	else
+		pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x4);
 
 	/* I2C_LT_EN*/
 	pmic_reg_write(dev, 0xa, 0x3);
diff --git a/include/power/pca9450.h b/include/power/pca9450.h
index b8219d535ad..f896d829d37 100644
--- a/include/power/pca9450.h
+++ b/include/power/pca9450.h
@@ -54,6 +54,8 @@ enum {
 	PCA9450_REG_NUM,
 };
 
+#define PCA9450_REG_PWRCTRL_TOFF_DEB    BIT(5)
+
 int power_pca9450_init(unsigned char bus, unsigned char addr);
 
 enum {

-- 
2.35.3