static void setup_power(int is_resume)
{
int error = 0;
power_init();
if (is_resume) {
return;
}
/* Initialize I2C bus to configure PMIC. */
exynos_pinmux_i2c0();
i2c_init(0, I2C_0_SPEED, 0x00);
printk(BIOS_DEBUG, "%s: Setting up PMIC...\n", __func__);
/*
* We're using CR1616 coin cell battery that is non-rechargeable
* battery. But, BBCHOSTEN bit of the BBAT Charger Register in
* MAX77686 is enabled by default for charging coin cell.
*
* Also, we cannot meet the coin cell reverse current spec. in UL
* standard if BBCHOSTEN bit is enabled.
*
* Disable Coin BATT Charging
*/
error = max77686_disable_backup_batt(PMIC_BUS);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK2, VDD_ARM_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK3, VDD_INT_UV,
REG_ENABLE, MAX77686_UV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK1, VDD_MIF_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK4, VDD_G3D_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO2, VDD_LDO2_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO3, VDD_LDO3_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO5, VDD_LDO5_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO10, VDD_LDO10_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_enable_32khz_cp(PMIC_BUS);
if (error) {
printk(BIOS_CRIT, "%s: PMIC error: %#x\n", __func__, error);
die("Failed to intialize PMIC.\n");
}
}
/**
* Initialize the pmic voltages to power up the system
* This also calls i2c_init so that we can program the pmic
*
* REG_ENABLE = 0, needed to set the buck/ldo enable bit ON
*
* @return Return 0 if ok, else -1
*/
int power_init(void)
{
int error = 0;
#ifdef CONFIG_SPL_BUILD
struct spl_machine_param *param = spl_get_machine_params();
/* Set the i2c register address base so i2c works before FDT */
i2c_set_early_reg(param->i2c_base);
#endif
ps_hold_setup();
/* init the i2c so that we can program pmic chip */
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
/*
* We're using CR1616 coin cell battery that is non-rechargeable
* battery. But, BBCHOSTEN bit of the BBAT Charger Register in
* MAX77686 is enabled by default for charging coin cell.
*
* Also, we cannot meet the coin cell reverse current spec. in UL
* standard if BBCHOSTEN bit is enabled.
*
* Disable Coin BATT Charging
*/
error = max77686_disable_backup_batt();
error |= max77686_volsetting(PMIC_BUCK2, CONFIG_VDD_ARM_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUCK3, CONFIG_VDD_INT_UV,
REG_ENABLE, MAX77686_UV);
error |= max77686_volsetting(PMIC_BUCK1, CONFIG_VDD_MIF_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUCK4, CONFIG_VDD_G3D_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO2, CONFIG_VDD_LDO2_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO3, CONFIG_VDD_LDO3_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO5, CONFIG_VDD_LDO5_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO10, CONFIG_VDD_LDO10_MV,
REG_ENABLE, MAX77686_MV);
if (error != 0)
debug("power init failed\n");
return error;
}