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imx8mm: evk: enable bd71837 pmic

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Enable bd71837 pmic for i.MX8MM EVK board, need to set voltage for
DRAM and linux suspend voltage requirement.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2019-10-16 10:24:42 +00:00 • committed by Stefano Babic
parent 1a9971035d
commit 8c61eba03d
3 changed files with 65 additions and 1 deletions
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20
arch/arm/dts/imx8mm-evk-u-boot.dtsi
View file

@ -90,3 +90,23 @@
&usdhc3 {
u-boot,dm-spl;
};
&i2c1 {
u-boot,dm-spl;
};
&{/soc@0/bus@30800000/i2c@30a20000/pmic@4b} {
u-boot,dm-spl;
};
&{/soc@0/bus@30800000/i2c@30a20000/pmic@4b/regulators} {
u-boot,dm-spl;
};
&pinctrl_i2c1 {
u-boot,dm-spl;
};
&pinctrl_pmic {
u-boot,dm-spl;
};

41
board/freescale/imx8mm_evk/spl.c
View file

@ -18,6 +18,9 @@
#include <dm/uclass-internal.h>
#include <dm/device-internal.h>
#include <power/pmic.h>
#include <power/bd71837.h>
DECLARE_GLOBAL_DATA_PTR;
int spl_board_boot_device(enum boot_device boot_dev_spl)
@ -79,6 +82,42 @@ int board_early_init_f(void)
return 0;
}
int power_init_board(void)
{
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;
/* 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;
}
void board_init_f(ulong dummy)
{
struct udevice *dev;
@ -113,6 +152,8 @@ void board_init_f(ulong dummy)
enable_tzc380();
power_init_board();
/* DDR initialization */
spl_dram_init();

5
configs/imx8mm_evk_defconfig
View file

@ -12,6 +12,7 @@ CONFIG_SPL_MMC_SUPPORT=y
CONFIG_SPL_SERIAL_SUPPORT=y
CONFIG_SPL_DRIVERS_MISC_SUPPORT=y
CONFIG_SPL=y
CONFIG_SPL_TEXT_BASE=0x7E1000
CONFIG_FIT=y
CONFIG_FIT_EXTERNAL_OFFSET=0x3000
CONFIG_SPL_LOAD_FIT=y
@ -20,10 +21,10 @@ CONFIG_OF_SYSTEM_SETUP=y
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/imx8m/imximage-8mm-lpddr4.cfg"
CONFIG_DEFAULT_FDT_FILE="fsl-imx8mm-evk.dtb"
CONFIG_BOARD_LATE_INIT=y
CONFIG_SPL_TEXT_BASE=0x7E1000
CONFIG_SPL_BOARD_INIT=y
CONFIG_SPL_SEPARATE_BSS=y
CONFIG_SPL_I2C_SUPPORT=y
CONFIG_SPL_POWER_SUPPORT=y
CONFIG_HUSH_PARSER=y
CONFIG_SYS_PROMPT="u-boot=> "
# CONFIG_CMD_EXPORTENV is not set
@ -65,6 +66,8 @@ CONFIG_DM_ETH=y
CONFIG_PINCTRL=y
CONFIG_SPL_PINCTRL=y
CONFIG_PINCTRL_IMX8M=y
CONFIG_DM_PMIC=y
CONFIG_SPL_DM_PMIC_BD71837=y
CONFIG_DM_REGULATOR=y
CONFIG_DM_REGULATOR_FIXED=y
CONFIG_DM_REGULATOR_GPIO=y