/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <delay.h> #include <device/i2c_simple.h> #include <reset.h> #include <stdint.h> #include "pmic.h" enum { MAX77620_I2C_ADDR = 0x3c, MAX77621_CPU_I2C_ADDR = 0x1B, MAX77621_GPU_I2C_ADDR = 0x1C, }; struct max77620_init_reg { u8 reg; u8 val; u8 delay; }; static void pmic_write_reg(unsigned int bus, uint8_t chip, uint8_t reg, uint8_t val, int delay) { if (i2c_writeb(bus, chip, reg, val)) { printk(BIOS_ERR, "%s: reg = 0x%02X, value = 0x%02X failed!\n", __func__, reg, val); /* Reset the board on any PMIC write error */ board_reset(); } else { if (delay) udelay(500); } } void pmic_write_reg_77620(unsigned int bus, uint8_t reg, uint8_t val, int delay) { pmic_write_reg(bus, MAX77620_I2C_ADDR, reg, val, delay); } static inline void pmic_write_reg_77621(unsigned int bus, uint8_t reg, uint8_t val, int delay) { pmic_write_reg(bus, MAX77621_CPU_I2C_ADDR, reg, val, delay); } void pmic_init(unsigned int bus) { /* MAX77620: Set SD0 to 1.0V - VDD_CORE */ pmic_write_reg_77620(bus, MAX77620_SD0_REG, 0x20, 1); pmic_write_reg_77620(bus, MAX77620_VDVSSD0_REG, 0x20, 1); /* MAX77620: GPIO 0,1,2,5,6,7 = GPIO, 3,4 = alt mode */ pmic_write_reg_77620(bus, MAX77620_AME_GPIO, 0x18, 1); /* MAX77620: Disable SD1 Remote Sense, Set SD1 for LPDDR4 to 1.125V */ pmic_write_reg_77620(bus, MAX77620_CNFG2SD_REG, 0x04, 1); pmic_write_reg_77620(bus, MAX77620_SD1_REG, 0x2a, 1); /* * MAX77620: Set LDO2 output to 1.8V. LDO2 is used as always-on * reference for the droop alert circuit. Match this setting with what * the kernel expects. */ pmic_write_reg_77620(bus, MAX77620_CNFG1_L2_REG, 0x14, 1); /* MAX77621: Set VOUT_REG to 1.0V - CPU VREG */ pmic_write_reg_77621(bus, MAX77621_VOUT_REG, 0xBF, 1); /* MAX77621: Set VOUT_DVC_REG to 1.0V - CPU VREG DVC */ pmic_write_reg_77621(bus, MAX77621_VOUT_DVC_REG, 0xBF, 1); /* MAX77621: Set CONTROL1 to 0x38 */ pmic_write_reg_77621(bus, MAX77621_CONTROL1_REG, 0x38, 1); /* MAX77621: Set CONTROL2 to 0xD2 */ pmic_write_reg_77621(bus, MAX77621_CONTROL2_REG, 0xD2, 1); /* MAX77620: Setup/Enable GPIO5 - EN_VDD_CPU */ pmic_write_reg_77620(bus, MAX77620_GPIO5_REG, 0x09, 1); /* Required delay of 2msec */ udelay(2000); printk(BIOS_DEBUG, "PMIC init done\n"); }