verdin-imx8mm: spl: switch to pca9450 pmic
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@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
diff --git a/board/toradex/verdin-imx8mm/spl.c b/board/toradex/verdin-imx8mm/spl.c
index cc78c56..9562cde 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 @@
struct udevice *dev;
int ret;
- ret = pmic_get("pmic@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 836c6f6..ea0b597 100644
--- a/configs/verdin-imx8mm_defconfig
+++ b/configs/verdin-imx8mm_defconfig
@@ -90,7 +90,7 @@
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