arch/arm/mach-omap2/omap_twl.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /**
   3  * OMAP and TWL PMIC specific initializations.
   4  *
   5  * Copyright (C) 2010 Texas Instruments Incorporated.
   6  * Thara Gopinath
   7  * Copyright (C) 2009 Texas Instruments Incorporated.
   8  * Nishanth Menon
   9  * Copyright (C) 2009 Nokia Corporation
  10  * Paul Walmsley
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/io.h>
  15 #include <linux/kernel.h>
  16 #include <linux/mfd/twl.h>
  17
  18 #include "soc.h"
  19 #include "voltage.h"
  20
  21 #include "pm.h"
  22
  23 #define OMAP3_SRI2C_SLAVE_ADDR          0x12
  24 #define OMAP3_VDD_MPU_SR_CONTROL_REG    0x00
  25 #define OMAP3_VDD_CORE_SR_CONTROL_REG   0x01
  26 #define OMAP3_VP_CONFIG_ERROROFFSET     0x00
  27 #define OMAP3_VP_VSTEPMIN_VSTEPMIN      0x1
  28 #define OMAP3_VP_VSTEPMAX_VSTEPMAX      0x04
  29 #define OMAP3_VP_VLIMITTO_TIMEOUT_US    200
  30
  31 #define OMAP4_SRI2C_SLAVE_ADDR          0x12
  32 #define OMAP4_VDD_MPU_SR_VOLT_REG       0x55
  33 #define OMAP4_VDD_MPU_SR_CMD_REG        0x56
  34 #define OMAP4_VDD_IVA_SR_VOLT_REG       0x5B
  35 #define OMAP4_VDD_IVA_SR_CMD_REG        0x5C
  36 #define OMAP4_VDD_CORE_SR_VOLT_REG      0x61
  37 #define OMAP4_VDD_CORE_SR_CMD_REG       0x62
  38
  39 static bool is_offset_valid;
  40 static u8 smps_offset;
  41
  42 #define REG_SMPS_OFFSET         0xE0
  43
  44 static unsigned long twl4030_vsel_to_uv(const u8 vsel)
  45 {
  46         return (((vsel * 125) + 6000)) * 100;
  47 }
  48
  49 static u8 twl4030_uv_to_vsel(unsigned long uv)
  50 {
  51         return DIV_ROUND_UP(uv - 600000, 12500);
  52 }
  53
  54 static unsigned long twl6030_vsel_to_uv(const u8 vsel)
  55 {
  56         /*
  57          * In TWL6030 depending on the value of SMPS_OFFSET
  58          * efuse register the voltage range supported in
  59          * standard mode can be either between 0.6V - 1.3V or
  60          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
  61          * is programmed to all 0's where as starting from
  62          * TWL6030 ES1.1 the efuse is programmed to 1
  63          */
  64         if (!is_offset_valid) {
  65                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
  66                                 REG_SMPS_OFFSET);
  67                 is_offset_valid = true;
  68         }
  69
  70         if (!vsel)
  71                 return 0;
  72         /*
  73          * There is no specific formula for voltage to vsel
  74          * conversion above 1.3V. There are special hardcoded
  75          * values for voltages above 1.3V. Currently we are
  76          * hardcoding only for 1.35 V which is used for 1GH OPP for
  77          * OMAP4430.
  78          */
  79         if (vsel == 0x3A)
  80                 return 1350000;
  81
  82         if (smps_offset & 0x8)
  83                 return ((((vsel - 1) * 1266) + 70900)) * 10;
  84         else
  85                 return ((((vsel - 1) * 1266) + 60770)) * 10;
  86 }
  87
  88 static u8 twl6030_uv_to_vsel(unsigned long uv)
  89 {
  90         /*
  91          * In TWL6030 depending on the value of SMPS_OFFSET
  92          * efuse register the voltage range supported in
  93          * standard mode can be either between 0.6V - 1.3V or
  94          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
  95          * is programmed to all 0's where as starting from
  96          * TWL6030 ES1.1 the efuse is programmed to 1
  97          */
  98         if (!is_offset_valid) {
  99                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
 100                                 REG_SMPS_OFFSET);
 101                 is_offset_valid = true;
 102         }
 103
 104         if (!uv)
 105                 return 0x00;
 106         /*
 107          * There is no specific formula for voltage to vsel
 108          * conversion above 1.3V. There are special hardcoded
 109          * values for voltages above 1.3V. Currently we are
 110          * hardcoding only for 1.35 V which is used for 1GH OPP for
 111          * OMAP4430.
 112          */
 113         if (uv > twl6030_vsel_to_uv(0x39)) {
 114                 if (uv == 1350000)
 115                         return 0x3A;
 116                 pr_err("%s:OUT OF RANGE! non mapped vsel for %ld Vs max %ld\n",
 117                         __func__, uv, twl6030_vsel_to_uv(0x39));
 118                 return 0x3A;
 119         }
 120
 121         if (smps_offset & 0x8)
 122                 return DIV_ROUND_UP(uv - 709000, 12660) + 1;
 123         else
 124                 return DIV_ROUND_UP(uv - 607700, 12660) + 1;
 125 }
 126
 127 static struct omap_voltdm_pmic omap3_mpu_pmic = {
 128         .slew_rate              = 4000,
 129         .step_size              = 12500,
 130         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 131         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 132         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 133         .vddmin                 = 600000,
 134         .vddmax                 = 1450000,
 135         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 136         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 137         .volt_reg_addr          = OMAP3_VDD_MPU_SR_CONTROL_REG,
 138         .i2c_high_speed         = true,
 139         .vsel_to_uv             = twl4030_vsel_to_uv,
 140         .uv_to_vsel             = twl4030_uv_to_vsel,
 141 };
 142
 143 static struct omap_voltdm_pmic omap3_core_pmic = {
 144         .slew_rate              = 4000,
 145         .step_size              = 12500,
 146         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 147         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 148         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 149         .vddmin                 = 600000,
 150         .vddmax                 = 1450000,
 151         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 152         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 153         .volt_reg_addr          = OMAP3_VDD_CORE_SR_CONTROL_REG,
 154         .i2c_high_speed         = true,
 155         .vsel_to_uv             = twl4030_vsel_to_uv,
 156         .uv_to_vsel             = twl4030_uv_to_vsel,
 157 };
 158
 159 static struct omap_voltdm_pmic omap4_mpu_pmic = {
 160         .slew_rate              = 4000,
 161         .step_size              = 12660,
 162         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 163         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 164         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 165         .vddmin                 = 0,
 166         .vddmax                 = 2100000,
 167         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 168         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 169         .volt_reg_addr          = OMAP4_VDD_MPU_SR_VOLT_REG,
 170         .cmd_reg_addr           = OMAP4_VDD_MPU_SR_CMD_REG,
 171         .i2c_high_speed         = true,
 172         .i2c_pad_load           = 3,
 173         .vsel_to_uv             = twl6030_vsel_to_uv,
 174         .uv_to_vsel             = twl6030_uv_to_vsel,
 175 };
 176
 177 static struct omap_voltdm_pmic omap4_iva_pmic = {
 178         .slew_rate              = 4000,
 179         .step_size              = 12660,
 180         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 181         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 182         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 183         .vddmin                 = 0,
 184         .vddmax                 = 2100000,
 185         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 186         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 187         .volt_reg_addr          = OMAP4_VDD_IVA_SR_VOLT_REG,
 188         .cmd_reg_addr           = OMAP4_VDD_IVA_SR_CMD_REG,
 189         .i2c_high_speed         = true,
 190         .i2c_pad_load           = 3,
 191         .vsel_to_uv             = twl6030_vsel_to_uv,
 192         .uv_to_vsel             = twl6030_uv_to_vsel,
 193 };
 194
 195 static struct omap_voltdm_pmic omap4_core_pmic = {
 196         .slew_rate              = 4000,
 197         .step_size              = 12660,
 198         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 199         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 200         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 201         .vddmin                 = 0,
 202         .vddmax                 = 2100000,
 203         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 204         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 205         .volt_reg_addr          = OMAP4_VDD_CORE_SR_VOLT_REG,
 206         .cmd_reg_addr           = OMAP4_VDD_CORE_SR_CMD_REG,
 207         .i2c_high_speed         = true,
 208         .i2c_pad_load           = 3,
 209         .vsel_to_uv             = twl6030_vsel_to_uv,
 210         .uv_to_vsel             = twl6030_uv_to_vsel,
 211 };
 212
 213 int __init omap4_twl_init(void)
 214 {
 215         struct voltagedomain *voltdm;
 216
 217         if (!cpu_is_omap44xx() ||
 218             of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
 219                 return -ENODEV;
 220
 221         voltdm = voltdm_lookup("mpu");
 222         omap_voltage_register_pmic(voltdm, &omap4_mpu_pmic);
 223
 224         voltdm = voltdm_lookup("iva");
 225         omap_voltage_register_pmic(voltdm, &omap4_iva_pmic);
 226
 227         voltdm = voltdm_lookup("core");
 228         omap_voltage_register_pmic(voltdm, &omap4_core_pmic);
 229
 230         return 0;
 231 }
 232
 233 int __init omap3_twl_init(void)
 234 {
 235         struct voltagedomain *voltdm;
 236
 237         if (!cpu_is_omap34xx())
 238                 return -ENODEV;
 239
 240         voltdm = voltdm_lookup("mpu_iva");
 241         omap_voltage_register_pmic(voltdm, &omap3_mpu_pmic);
 242
 243         voltdm = voltdm_lookup("core");
 244         omap_voltage_register_pmic(voltdm, &omap3_core_pmic);
 245
 246         return 0;
 247 }