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verdin-imx8mm: spl: switch to pca9450 pmic

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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>
This commit is contained in:
Max Krummenacher 2020-10-28 11:58:12 +02:00 committed by Stefano Babic
parent caafc6c497
commit 7d43807d6c
2 changed files with 24 additions and 26 deletions
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48
board/toradex/verdin-imx8mm/spl.c
View file

@ -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@4b", &dev);
if (ret == -ENODEV) {
puts("No pmic\n");
if (IS_ENABLED(CONFIG_SPL_DM_PMIC_PCA9450)) {
ret = pmic_get("pmic", &dev);
if (ret == -ENODEV) {
puts("No pmic found\n");
return ret;
}
if (ret != 0)
return ret;
/* BUCKxOUT_DVS0/1 control BUCK123 output, clear PRESET_EN */
pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
/* increase VDD_DRAM to 0.975v for 1.5Ghz DDR */
pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, 0x1c);
/* set WDOG_B_CFG to cold reset */
pmic_reg_write(dev, PCA9450_RESET_CTRL, 0xA1);
return 0;
}
if (ret != 0)
return ret;
/* decrease RESET key long push time from the default 10s to 10ms */
pmic_reg_write(dev, BD718XX_PWRONCONFIG1, 0x0);
/* unlock the PMIC regs */
pmic_reg_write(dev, BD718XX_REGLOCK, 0x1);
/* 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 3Ghz DDR */
pmic_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83);
#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;
}

2
configs/verdin-imx8mm_defconfig
View file

@ -90,7 +90,7 @@ 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