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

[Peng Fan (OSS)]

From: Peng Fan <peng....@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....@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@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