[PATCH v1 5/9] verdin-imx8mm: spl: switch to pca9450 pmic

[Igor Opaniuk]

From: Max Krummenacher <max.krummenacher at toradex.com>

V1.1A HW switched the PMIC from BD71837 to PCA9450.

- Disable combined DVS in PCA9450_BUCK123_DVS.
- Increase DDR Voltage to 0.95V as we use a 1.5GHz RAM.
- Configure WDOG_B behaviour.

Signed-off-by: Max Krummenacher <max.krummenacher at toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk at toradex.com>
---

 board/toradex/verdin-imx8mm/spl.c | 42 +++++++++++++++----------------
 configs/verdin-imx8mm_defconfig   |  2 +-
 2 files changed, 21 insertions(+), 23 deletions(-)

diff --git a/board/toradex/verdin-imx8mm/spl.c b/board/toradex/verdin-imx8mm/spl.c
index cc78c5666b..9562cdeb35 100644
--- a/board/toradex/verdin-imx8mm/spl.c
+++ b/board/toradex/verdin-imx8mm/spl.c
@@ -21,12 +21,16 @@
 #include <dm/uclass.h>
 #include <dm/uclass-internal.h>
 #include <hang.h>
+#include <i2c.h>
 #include <power/bd71837.h>
+#include <power/pca9450.h>
 #include <power/pmic.h>
 #include <spl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define I2C_PMIC_BUS_ID        1
+
 int spl_board_boot_device(enum boot_device boot_dev_spl)
 {
 	switch (boot_dev_spl) {
@@ -101,33 +105,27 @@ int power_init_board(void)
 	struct udevice *dev;
 	int ret;
 
-	ret = pmic_get("pmic at 4b", &dev);
-	if (ret == -ENODEV) {
-		puts("No pmic\n");
-		return 0;
-	}
-	if (ret != 0)
-		return ret;
+	if (IS_ENABLED(CONFIG_SPL_DM_PMIC_PCA9450)) {
+		ret = pmic_get("pmic", &dev);
+		if (ret == -ENODEV) {
+			puts("No pmic found\n");
+			return ret;
+		}
 
-	/* decrease RESET key long push time from the default 10s to 10ms */
-	pmic_reg_write(dev, BD718XX_PWRONCONFIG1, 0x0);
+		if (ret != 0)
+			return ret;
 
-	/* unlock the PMIC regs */
-	pmic_reg_write(dev, BD718XX_REGLOCK, 0x1);
+		/* BUCKxOUT_DVS0/1 control BUCK123 output, clear PRESET_EN */
+		pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
 
-	/* increase VDD_SOC to typical value 0.85v before first DRAM access */
-	pmic_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f);
+		/* increase VDD_DRAM to 0.975v for 1.5Ghz DDR */
+		pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, 0x1c);
 
-	/* increase VDD_DRAM to 0.975v for 3Ghz DDR */
-	pmic_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83);
+		/* set WDOG_B_CFG to cold reset */
+		pmic_reg_write(dev, PCA9450_RESET_CTRL, 0xA1);
 
-#ifndef CONFIG_IMX8M_LPDDR4
-	/* increase NVCC_DRAM_1V2 to 1.2v for DDR4 */
-	pmic_reg_write(dev, BD718XX_4TH_NODVS_BUCK_VOLT, 0x28);
-#endif
-
-	/* lock the PMIC regs */
-	pmic_reg_write(dev, BD718XX_REGLOCK, 0x11);
+		return 0;
+	}
 
 	return 0;
 }
diff --git a/configs/verdin-imx8mm_defconfig b/configs/verdin-imx8mm_defconfig
index 7ebfd6792f..d856e3a318 100644
--- a/configs/verdin-imx8mm_defconfig
+++ b/configs/verdin-imx8mm_defconfig
@@ -91,7 +91,7 @@ CONFIG_PINCTRL=y
 CONFIG_SPL_PINCTRL=y
 CONFIG_PINCTRL_IMX8M=y
 CONFIG_DM_PMIC=y
-CONFIG_SPL_DM_PMIC_BD71837=y
+CONFIG_SPL_DM_PMIC_PCA9450=y
 CONFIG_DM_PMIC_PFUZE100=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_FIXED=y
-- 
2.17.1