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 #define OMAP4_VP_CONFIG_ERROROFFSET     0x00
  40 #define OMAP4_VP_VSTEPMIN_VSTEPMIN      0x01
  41 #define OMAP4_VP_VSTEPMAX_VSTEPMAX      0x04
  42 #define OMAP4_VP_VLIMITTO_TIMEOUT_US    200
  43
  44 static bool is_offset_valid;
  45 static u8 smps_offset;
  46
  47 #define REG_SMPS_OFFSET         0xE0
  48
  49 static unsigned long twl4030_vsel_to_uv(const u8 vsel)
  50 {
  51         return (((vsel * 125) + 6000)) * 100;
  52 }
  53
  54 static u8 twl4030_uv_to_vsel(unsigned long uv)
  55 {
  56         return DIV_ROUND_UP(uv - 600000, 12500);
  57 }
  58
  59 static unsigned long twl6030_vsel_to_uv(const u8 vsel)
  60 {
  61         /*
  62          * In TWL6030 depending on the value of SMPS_OFFSET
  63          * efuse register the voltage range supported in
  64          * standard mode can be either between 0.6V - 1.3V or
  65          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
  66          * is programmed to all 0's where as starting from
  67          * TWL6030 ES1.1 the efuse is programmed to 1
  68          */
  69         if (!is_offset_valid) {
  70                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
  71                                 REG_SMPS_OFFSET);
  72                 is_offset_valid = true;
  73         }
  74
  75         if (!vsel)
  76                 return 0;
  77         /*
  78          * There is no specific formula for voltage to vsel
  79          * conversion above 1.3V. There are special hardcoded
  80          * values for voltages above 1.3V. Currently we are
  81          * hardcoding only for 1.35 V which is used for 1GH OPP for
  82          * OMAP4430.
  83          */
  84         if (vsel == 0x3A)
  85                 return 1350000;
  86
  87         if (smps_offset & 0x8)
  88                 return ((((vsel - 1) * 1266) + 70900)) * 10;
  89         else
  90                 return ((((vsel - 1) * 1266) + 60770)) * 10;
  91 }
  92
  93 static u8 twl6030_uv_to_vsel(unsigned long uv)
  94 {
  95         /*
  96          * In TWL6030 depending on the value of SMPS_OFFSET
  97          * efuse register the voltage range supported in
  98          * standard mode can be either between 0.6V - 1.3V or
  99          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
 100          * is programmed to all 0's where as starting from
 101          * TWL6030 ES1.1 the efuse is programmed to 1
 102          */
 103         if (!is_offset_valid) {
 104                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
 105                                 REG_SMPS_OFFSET);
 106                 is_offset_valid = true;
 107         }
 108
 109         if (!uv)
 110                 return 0x00;
 111         /*
 112          * There is no specific formula for voltage to vsel
 113          * conversion above 1.3V. There are special hardcoded
 114          * values for voltages above 1.3V. Currently we are
 115          * hardcoding only for 1.35 V which is used for 1GH OPP for
 116          * OMAP4430.
 117          */
 118         if (uv > twl6030_vsel_to_uv(0x39)) {
 119                 if (uv == 1350000)
 120                         return 0x3A;
 121                 pr_err("%s:OUT OF RANGE! non mapped vsel for %ld Vs max %ld\n",
 122                         __func__, uv, twl6030_vsel_to_uv(0x39));
 123                 return 0x3A;
 124         }
 125
 126         if (smps_offset & 0x8)
 127                 return DIV_ROUND_UP(uv - 709000, 12660) + 1;
 128         else
 129                 return DIV_ROUND_UP(uv - 607700, 12660) + 1;
 130 }
 131
 132 static struct omap_voltdm_pmic omap3_mpu_pmic = {
 133         .slew_rate              = 4000,
 134         .step_size              = 12500,
 135         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 136         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 137         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 138         .vddmin                 = 600000,
 139         .vddmax                 = 1450000,
 140         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 141         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 142         .volt_reg_addr          = OMAP3_VDD_MPU_SR_CONTROL_REG,
 143         .i2c_high_speed         = true,
 144         .vsel_to_uv             = twl4030_vsel_to_uv,
 145         .uv_to_vsel             = twl4030_uv_to_vsel,
 146 };
 147
 148 static struct omap_voltdm_pmic omap3_core_pmic = {
 149         .slew_rate              = 4000,
 150         .step_size              = 12500,
 151         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 152         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 153         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 154         .vddmin                 = 600000,
 155         .vddmax                 = 1450000,
 156         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 157         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 158         .volt_reg_addr          = OMAP3_VDD_CORE_SR_CONTROL_REG,
 159         .i2c_high_speed         = true,
 160         .vsel_to_uv             = twl4030_vsel_to_uv,
 161         .uv_to_vsel             = twl4030_uv_to_vsel,
 162 };
 163
 164 static struct omap_voltdm_pmic omap4_mpu_pmic = {
 165         .slew_rate              = 4000,
 166         .step_size              = 12660,
 167         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 168         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 169         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 170         .vddmin                 = 0,
 171         .vddmax                 = 2100000,
 172         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 173         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 174         .volt_reg_addr          = OMAP4_VDD_MPU_SR_VOLT_REG,
 175         .cmd_reg_addr           = OMAP4_VDD_MPU_SR_CMD_REG,
 176         .i2c_high_speed         = true,
 177         .i2c_pad_load           = 3,
 178         .vsel_to_uv             = twl6030_vsel_to_uv,
 179         .uv_to_vsel             = twl6030_uv_to_vsel,
 180 };
 181
 182 static struct omap_voltdm_pmic omap4_iva_pmic = {
 183         .slew_rate              = 4000,
 184         .step_size              = 12660,
 185         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 186         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 187         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 188         .vddmin                 = 0,
 189         .vddmax                 = 2100000,
 190         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 191         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 192         .volt_reg_addr          = OMAP4_VDD_IVA_SR_VOLT_REG,
 193         .cmd_reg_addr           = OMAP4_VDD_IVA_SR_CMD_REG,
 194         .i2c_high_speed         = true,
 195         .i2c_pad_load           = 3,
 196         .vsel_to_uv             = twl6030_vsel_to_uv,
 197         .uv_to_vsel             = twl6030_uv_to_vsel,
 198 };
 199
 200 static struct omap_voltdm_pmic omap4_core_pmic = {
 201         .slew_rate              = 4000,
 202         .step_size              = 12660,
 203         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 204         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 205         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 206         .vddmin                 = 0,
 207         .vddmax                 = 2100000,
 208         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 209         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 210         .volt_reg_addr          = OMAP4_VDD_CORE_SR_VOLT_REG,
 211         .cmd_reg_addr           = OMAP4_VDD_CORE_SR_CMD_REG,
 212         .i2c_high_speed         = true,
 213         .i2c_pad_load           = 3,
 214         .vsel_to_uv             = twl6030_vsel_to_uv,
 215         .uv_to_vsel             = twl6030_uv_to_vsel,
 216 };
 217
 218 int __init omap4_twl_init(void)
 219 {
 220         struct voltagedomain *voltdm;
 221
 222         if (!cpu_is_omap44xx())
 223                 return -ENODEV;
 224
 225         voltdm = voltdm_lookup("mpu");
 226         omap_voltage_register_pmic(voltdm, &omap4_mpu_pmic);
 227
 228         voltdm = voltdm_lookup("iva");
 229         omap_voltage_register_pmic(voltdm, &omap4_iva_pmic);
 230
 231         voltdm = voltdm_lookup("core");
 232         omap_voltage_register_pmic(voltdm, &omap4_core_pmic);
 233
 234         return 0;
 235 }
 236
 237 int __init omap3_twl_init(void)
 238 {
 239         struct voltagedomain *voltdm;
 240
 241         if (!cpu_is_omap34xx())
 242                 return -ENODEV;
 243
 244         voltdm = voltdm_lookup("mpu_iva");
 245         omap_voltage_register_pmic(voltdm, &omap3_mpu_pmic);
 246
 247         voltdm = voltdm_lookup("core");
 248         omap_voltage_register_pmic(voltdm, &omap3_core_pmic);
 249
 250         return 0;
 251 }