1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2013 4 * NVIDIA Corporation <www.nvidia.com> 5 */ 6 7#include <common.h> 8#include <log.h> 9#include <asm/io.h> 10#include <asm/arch-tegra/tegra_i2c.h> 11#include <linux/delay.h> 12 13/* AS3722-PMIC-specific early init regs */ 14 15#define AS3722_I2C_ADDR 0x80 16 17#define AS3722_SD0VOLTAGE_REG 0x00 /* CPU */ 18#define AS3722_SD1VOLTAGE_REG 0x01 /* CORE, already set by OTP */ 19#define AS3722_SD6VOLTAGE_REG 0x06 /* GPU */ 20#define AS3722_SDCONTROL_REG 0x4D 21 22#define AS3722_LDO2VOLTAGE_REG 0x12 /* VPP_FUSE */ 23#define AS3722_LDO6VOLTAGE_REG 0x16 /* VDD_SDMMC */ 24#define AS3722_LDCONTROL_REG 0x4E 25 26#if defined(CONFIG_TARGET_VENICE2) 27#define AS3722_SD0VOLTAGE_DATA (0x2800 | AS3722_SD0VOLTAGE_REG) 28#else /* TK1 or Nyan-Big */ 29#define AS3722_SD0VOLTAGE_DATA (0x3C00 | AS3722_SD0VOLTAGE_REG) 30#endif 31#define AS3722_SD0CONTROL_DATA (0x0100 | AS3722_SDCONTROL_REG) 32 33#if defined(CONFIG_TARGET_JETSON_TK1) || defined(CONFIG_TARGET_CEI_TK1_SOM) 34#define AS3722_SD1VOLTAGE_DATA (0x2800 | AS3722_SD1VOLTAGE_REG) 35#define AS3722_SD1CONTROL_DATA (0x0200 | AS3722_SDCONTROL_REG) 36#endif 37 38#define AS3722_SD6CONTROL_DATA (0x4000 | AS3722_SDCONTROL_REG) 39#define AS3722_SD6VOLTAGE_DATA (0x2800 | AS3722_SD6VOLTAGE_REG) 40 41#define AS3722_LDO2CONTROL_DATA (0x0400 | AS3722_LDCONTROL_REG) 42#define AS3722_LDO2VOLTAGE_DATA (0x1000 | AS3722_LDO2VOLTAGE_REG) 43 44#define AS3722_LDO6CONTROL_DATA (0x4000 | AS3722_LDCONTROL_REG) 45#define AS3722_LDO6VOLTAGE_DATA (0x3F00 | AS3722_LDO6VOLTAGE_REG) 46 47/* AS3722-PMIC-specific early init code - get CPU rails up, etc */ 48 49void pmic_enable_cpu_vdd(void) 50{ 51 debug("%s entry\n", __func__); 52 53#ifdef AS3722_SD1VOLTAGE_DATA 54 /* Set up VDD_CORE, for boards where OTP is incorrect*/ 55 debug("%s: Setting VDD_CORE via AS3722 reg 1\n", __func__); 56 /* Configure VDD_CORE via the AS3722 PMIC on the PWR I2C bus */ 57 tegra_i2c_ll_write(AS3722_I2C_ADDR, 58 AS3722_SD1VOLTAGE_DATA); 59 /* 60 * Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled. 61 * tegra_i2c_ll_write_data(AS3722_SD1CONTROL_DATA, I2C_SEND_2_BYTES); 62 */ 63 udelay(10 * 1000); 64#endif 65 66 debug("%s: Setting VDD_CPU to 1.0V via AS3722 reg 0/4D\n", __func__); 67 /* 68 * Bring up VDD_CPU via the AS3722 PMIC on the PWR I2C bus. 69 * First set VDD to 1.0V, then enable the VDD regulator. 70 */ 71 tegra_i2c_ll_write(AS3722_I2C_ADDR, 72 AS3722_SD0VOLTAGE_DATA); 73 /* 74 * Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled. 75 * tegra_i2c_ll_write_data(AS3722_SD0CONTROL_DATA, I2C_SEND_2_BYTES); 76 */ 77 udelay(10 * 1000); 78 79 debug("%s: Setting VDD_GPU to 1.0V via AS3722 reg 6/4D\n", __func__); 80 /* 81 * Bring up VDD_GPU via the AS3722 PMIC on the PWR I2C bus. 82 * First set VDD to 1.0V, then enable the VDD regulator. 83 */ 84 tegra_i2c_ll_write(AS3722_I2C_ADDR, 85 AS3722_SD6VOLTAGE_DATA); 86 /* 87 * Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled. 88 * tegra_i2c_ll_write_data(AS3722_SD6CONTROL_DATA, I2C_SEND_2_BYTES); 89 */ 90 udelay(10 * 1000); 91 92 debug("%s: Set VPP_FUSE to 1.2V via AS3722 reg 0x12/4E\n", __func__); 93 /* 94 * Bring up VPP_FUSE via the AS3722 PMIC on the PWR I2C bus. 95 * First set VDD to 1.2V, then enable the VDD regulator. 96 */ 97 tegra_i2c_ll_write(AS3722_I2C_ADDR, 98 AS3722_LDO2VOLTAGE_DATA); 99 /* 100 * Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled. 101 * tegra_i2c_ll_write_data(AS3722_LDO2CONTROL_DATA, I2C_SEND_2_BYTES); 102 */ 103 udelay(10 * 1000); 104 105 debug("%s: Set VDD_SDMMC to 3.3V via AS3722 reg 0x16/4E\n", __func__); 106 /* 107 * Bring up VDD_SDMMC via the AS3722 PMIC on the PWR I2C bus. 108 * First set it to bypass 3.3V straight thru, then enable the regulator 109 * 110 * NOTE: We do this early because doing it later seems to hose the CPU 111 * power rail/partition startup. Need to debug. 112 */ 113 tegra_i2c_ll_write(AS3722_I2C_ADDR, 114 AS3722_LDO6VOLTAGE_DATA); 115 /* 116 * Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled. 117 * tegra_i2c_ll_write_data(AS3722_LDO6CONTROL_DATA, I2C_SEND_2_BYTES); 118 */ 119 udelay(10 * 1000); 120} 121