root/drivers/regulator/sc2731-regulator.c

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DEFINITIONS

This source file includes following definitions.
  1. sc2731_regulator_unlock
  2. sc2731_regulator_probe

   1  //SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2017 Spreadtrum Communications Inc.
   4  */
   5 
   6 #include <linux/module.h>
   7 #include <linux/of.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/regmap.h>
  10 #include <linux/regulator/driver.h>
  11 #include <linux/regulator/of_regulator.h>
  12 
  13 /*
  14  * SC2731 regulator lock register
  15  */
  16 #define SC2731_PWR_WR_PROT              0xf0c
  17 #define SC2731_WR_UNLOCK_VALUE          0x6e7f
  18 
  19 /*
  20  * SC2731 enable register
  21  */
  22 #define SC2731_POWER_PD_SW              0xc28
  23 #define SC2731_LDO_CAMA0_PD             0xcfc
  24 #define SC2731_LDO_CAMA1_PD             0xd04
  25 #define SC2731_LDO_CAMMOT_PD            0xd0c
  26 #define SC2731_LDO_VLDO_PD              0xd6c
  27 #define SC2731_LDO_EMMCCORE_PD          0xd2c
  28 #define SC2731_LDO_SDCORE_PD            0xd74
  29 #define SC2731_LDO_SDIO_PD              0xd70
  30 #define SC2731_LDO_WIFIPA_PD            0xd4c
  31 #define SC2731_LDO_USB33_PD             0xd5c
  32 #define SC2731_LDO_CAMD0_PD             0xd7c
  33 #define SC2731_LDO_CAMD1_PD             0xd84
  34 #define SC2731_LDO_CON_PD               0xd8c
  35 #define SC2731_LDO_CAMIO_PD             0xd94
  36 #define SC2731_LDO_SRAM_PD              0xd78
  37 
  38 /*
  39  * SC2731 enable mask
  40  */
  41 #define SC2731_DCDC_CPU0_PD_MASK        BIT(4)
  42 #define SC2731_DCDC_CPU1_PD_MASK        BIT(3)
  43 #define SC2731_DCDC_RF_PD_MASK          BIT(11)
  44 #define SC2731_LDO_CAMA0_PD_MASK        BIT(0)
  45 #define SC2731_LDO_CAMA1_PD_MASK        BIT(0)
  46 #define SC2731_LDO_CAMMOT_PD_MASK       BIT(0)
  47 #define SC2731_LDO_VLDO_PD_MASK         BIT(0)
  48 #define SC2731_LDO_EMMCCORE_PD_MASK     BIT(0)
  49 #define SC2731_LDO_SDCORE_PD_MASK       BIT(0)
  50 #define SC2731_LDO_SDIO_PD_MASK         BIT(0)
  51 #define SC2731_LDO_WIFIPA_PD_MASK       BIT(0)
  52 #define SC2731_LDO_USB33_PD_MASK        BIT(0)
  53 #define SC2731_LDO_CAMD0_PD_MASK        BIT(0)
  54 #define SC2731_LDO_CAMD1_PD_MASK        BIT(0)
  55 #define SC2731_LDO_CON_PD_MASK          BIT(0)
  56 #define SC2731_LDO_CAMIO_PD_MASK        BIT(0)
  57 #define SC2731_LDO_SRAM_PD_MASK         BIT(0)
  58 
  59 /*
  60  * SC2731 vsel register
  61  */
  62 #define SC2731_DCDC_CPU0_VOL            0xc54
  63 #define SC2731_DCDC_CPU1_VOL            0xc64
  64 #define SC2731_DCDC_RF_VOL              0xcb8
  65 #define SC2731_LDO_CAMA0_VOL            0xd00
  66 #define SC2731_LDO_CAMA1_VOL            0xd08
  67 #define SC2731_LDO_CAMMOT_VOL           0xd10
  68 #define SC2731_LDO_VLDO_VOL             0xd28
  69 #define SC2731_LDO_EMMCCORE_VOL         0xd30
  70 #define SC2731_LDO_SDCORE_VOL           0xd38
  71 #define SC2731_LDO_SDIO_VOL             0xd40
  72 #define SC2731_LDO_WIFIPA_VOL           0xd50
  73 #define SC2731_LDO_USB33_VOL            0xd60
  74 #define SC2731_LDO_CAMD0_VOL            0xd80
  75 #define SC2731_LDO_CAMD1_VOL            0xd88
  76 #define SC2731_LDO_CON_VOL              0xd90
  77 #define SC2731_LDO_CAMIO_VOL            0xd98
  78 #define SC2731_LDO_SRAM_VOL             0xdB0
  79 
  80 /*
  81  * SC2731 vsel register mask
  82  */
  83 #define SC2731_DCDC_CPU0_VOL_MASK       GENMASK(8, 0)
  84 #define SC2731_DCDC_CPU1_VOL_MASK       GENMASK(8, 0)
  85 #define SC2731_DCDC_RF_VOL_MASK         GENMASK(8, 0)
  86 #define SC2731_LDO_CAMA0_VOL_MASK       GENMASK(7, 0)
  87 #define SC2731_LDO_CAMA1_VOL_MASK       GENMASK(7, 0)
  88 #define SC2731_LDO_CAMMOT_VOL_MASK      GENMASK(7, 0)
  89 #define SC2731_LDO_VLDO_VOL_MASK        GENMASK(7, 0)
  90 #define SC2731_LDO_EMMCCORE_VOL_MASK    GENMASK(7, 0)
  91 #define SC2731_LDO_SDCORE_VOL_MASK      GENMASK(7, 0)
  92 #define SC2731_LDO_SDIO_VOL_MASK        GENMASK(7, 0)
  93 #define SC2731_LDO_WIFIPA_VOL_MASK      GENMASK(7, 0)
  94 #define SC2731_LDO_USB33_VOL_MASK       GENMASK(7, 0)
  95 #define SC2731_LDO_CAMD0_VOL_MASK       GENMASK(6, 0)
  96 #define SC2731_LDO_CAMD1_VOL_MASK       GENMASK(6, 0)
  97 #define SC2731_LDO_CON_VOL_MASK         GENMASK(6, 0)
  98 #define SC2731_LDO_CAMIO_VOL_MASK       GENMASK(6, 0)
  99 #define SC2731_LDO_SRAM_VOL_MASK        GENMASK(6, 0)
 100 
 101 enum sc2731_regulator_id {
 102         SC2731_BUCK_CPU0,
 103         SC2731_BUCK_CPU1,
 104         SC2731_BUCK_RF,
 105         SC2731_LDO_CAMA0,
 106         SC2731_LDO_CAMA1,
 107         SC2731_LDO_CAMMOT,
 108         SC2731_LDO_VLDO,
 109         SC2731_LDO_EMMCCORE,
 110         SC2731_LDO_SDCORE,
 111         SC2731_LDO_SDIO,
 112         SC2731_LDO_WIFIPA,
 113         SC2731_LDO_USB33,
 114         SC2731_LDO_CAMD0,
 115         SC2731_LDO_CAMD1,
 116         SC2731_LDO_CON,
 117         SC2731_LDO_CAMIO,
 118         SC2731_LDO_SRAM,
 119 };
 120 
 121 static const struct regulator_ops sc2731_regu_linear_ops = {
 122         .enable = regulator_enable_regmap,
 123         .disable = regulator_disable_regmap,
 124         .is_enabled = regulator_is_enabled_regmap,
 125         .list_voltage = regulator_list_voltage_linear,
 126         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 127         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 128 };
 129 
 130 #define SC2731_REGU_LINEAR(_id, en_reg, en_mask, vreg, vmask,   \
 131                           vstep, vmin, vmax) {                  \
 132         .name                   = #_id,                         \
 133         .of_match               = of_match_ptr(#_id),           \
 134         .ops                    = &sc2731_regu_linear_ops,      \
 135         .type                   = REGULATOR_VOLTAGE,            \
 136         .id                     = SC2731_##_id,                 \
 137         .owner                  = THIS_MODULE,                  \
 138         .min_uV                 = vmin,                         \
 139         .n_voltages             = ((vmax) - (vmin)) / (vstep) + 1,      \
 140         .uV_step                = vstep,                        \
 141         .enable_is_inverted     = true,                         \
 142         .enable_val             = 0,                            \
 143         .enable_reg             = en_reg,                       \
 144         .enable_mask            = en_mask,                      \
 145         .vsel_reg               = vreg,                         \
 146         .vsel_mask              = vmask,                        \
 147 }
 148 
 149 static const struct regulator_desc regulators[] = {
 150         SC2731_REGU_LINEAR(BUCK_CPU0, SC2731_POWER_PD_SW,
 151                            SC2731_DCDC_CPU0_PD_MASK, SC2731_DCDC_CPU0_VOL,
 152                            SC2731_DCDC_CPU0_VOL_MASK, 3125, 400000, 1996875),
 153         SC2731_REGU_LINEAR(BUCK_CPU1, SC2731_POWER_PD_SW,
 154                            SC2731_DCDC_CPU1_PD_MASK, SC2731_DCDC_CPU1_VOL,
 155                            SC2731_DCDC_CPU1_VOL_MASK, 3125, 400000, 1996875),
 156         SC2731_REGU_LINEAR(BUCK_RF, SC2731_POWER_PD_SW, SC2731_DCDC_RF_PD_MASK,
 157                            SC2731_DCDC_RF_VOL, SC2731_DCDC_RF_VOL_MASK,
 158                            3125, 600000, 2196875),
 159         SC2731_REGU_LINEAR(LDO_CAMA0, SC2731_LDO_CAMA0_PD,
 160                            SC2731_LDO_CAMA0_PD_MASK, SC2731_LDO_CAMA0_VOL,
 161                            SC2731_LDO_CAMA0_VOL_MASK, 10000, 1200000, 3750000),
 162         SC2731_REGU_LINEAR(LDO_CAMA1, SC2731_LDO_CAMA1_PD,
 163                            SC2731_LDO_CAMA1_PD_MASK, SC2731_LDO_CAMA1_VOL,
 164                            SC2731_LDO_CAMA1_VOL_MASK, 10000, 1200000, 3750000),
 165         SC2731_REGU_LINEAR(LDO_CAMMOT, SC2731_LDO_CAMMOT_PD,
 166                            SC2731_LDO_CAMMOT_PD_MASK, SC2731_LDO_CAMMOT_VOL,
 167                            SC2731_LDO_CAMMOT_VOL_MASK, 10000, 1200000, 3750000),
 168         SC2731_REGU_LINEAR(LDO_VLDO, SC2731_LDO_VLDO_PD,
 169                            SC2731_LDO_VLDO_PD_MASK, SC2731_LDO_VLDO_VOL,
 170                            SC2731_LDO_VLDO_VOL_MASK, 10000, 1200000, 3750000),
 171         SC2731_REGU_LINEAR(LDO_EMMCCORE, SC2731_LDO_EMMCCORE_PD,
 172                            SC2731_LDO_EMMCCORE_PD_MASK, SC2731_LDO_EMMCCORE_VOL,
 173                            SC2731_LDO_EMMCCORE_VOL_MASK, 10000, 1200000,
 174                            3750000),
 175         SC2731_REGU_LINEAR(LDO_SDCORE, SC2731_LDO_SDCORE_PD,
 176                            SC2731_LDO_SDCORE_PD_MASK, SC2731_LDO_SDCORE_VOL,
 177                            SC2731_LDO_SDCORE_VOL_MASK, 10000, 1200000, 3750000),
 178         SC2731_REGU_LINEAR(LDO_SDIO, SC2731_LDO_SDIO_PD,
 179                            SC2731_LDO_SDIO_PD_MASK, SC2731_LDO_SDIO_VOL,
 180                            SC2731_LDO_SDIO_VOL_MASK, 10000, 1200000, 3750000),
 181         SC2731_REGU_LINEAR(LDO_WIFIPA, SC2731_LDO_WIFIPA_PD,
 182                            SC2731_LDO_WIFIPA_PD_MASK, SC2731_LDO_WIFIPA_VOL,
 183                            SC2731_LDO_WIFIPA_VOL_MASK, 10000, 1200000, 3750000),
 184         SC2731_REGU_LINEAR(LDO_USB33, SC2731_LDO_USB33_PD,
 185                            SC2731_LDO_USB33_PD_MASK, SC2731_LDO_USB33_VOL,
 186                            SC2731_LDO_USB33_VOL_MASK, 10000, 1200000, 3750000),
 187         SC2731_REGU_LINEAR(LDO_CAMD0, SC2731_LDO_CAMD0_PD,
 188                            SC2731_LDO_CAMD0_PD_MASK, SC2731_LDO_CAMD0_VOL,
 189                            SC2731_LDO_CAMD0_VOL_MASK, 6250, 1000000, 1793750),
 190         SC2731_REGU_LINEAR(LDO_CAMD1, SC2731_LDO_CAMD1_PD,
 191                            SC2731_LDO_CAMD1_PD_MASK, SC2731_LDO_CAMD1_VOL,
 192                            SC2731_LDO_CAMD1_VOL_MASK, 6250, 1000000, 1793750),
 193         SC2731_REGU_LINEAR(LDO_CON, SC2731_LDO_CON_PD,
 194                            SC2731_LDO_CON_PD_MASK, SC2731_LDO_CON_VOL,
 195                            SC2731_LDO_CON_VOL_MASK, 6250, 1000000, 1793750),
 196         SC2731_REGU_LINEAR(LDO_CAMIO, SC2731_LDO_CAMIO_PD,
 197                            SC2731_LDO_CAMIO_PD_MASK, SC2731_LDO_CAMIO_VOL,
 198                            SC2731_LDO_CAMIO_VOL_MASK, 6250, 1000000, 1793750),
 199         SC2731_REGU_LINEAR(LDO_SRAM, SC2731_LDO_SRAM_PD,
 200                            SC2731_LDO_SRAM_PD_MASK, SC2731_LDO_SRAM_VOL,
 201                            SC2731_LDO_SRAM_VOL_MASK, 6250, 1000000, 1793750),
 202 };
 203 
 204 static int sc2731_regulator_unlock(struct regmap *regmap)
 205 {
 206         return regmap_write(regmap, SC2731_PWR_WR_PROT,
 207                             SC2731_WR_UNLOCK_VALUE);
 208 }
 209 
 210 static int sc2731_regulator_probe(struct platform_device *pdev)
 211 {
 212         int i, ret;
 213         struct regmap *regmap;
 214         struct regulator_config config = { };
 215         struct regulator_dev *rdev;
 216 
 217         regmap = dev_get_regmap(pdev->dev.parent, NULL);
 218         if (!regmap) {
 219                 dev_err(&pdev->dev, "failed to get regmap.\n");
 220                 return -ENODEV;
 221         }
 222 
 223         ret = sc2731_regulator_unlock(regmap);
 224         if (ret) {
 225                 dev_err(&pdev->dev, "failed to release regulator lock\n");
 226                 return ret;
 227         }
 228 
 229         config.dev = &pdev->dev;
 230         config.regmap = regmap;
 231 
 232         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 233                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 234                                                &config);
 235                 if (IS_ERR(rdev)) {
 236                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 237                                 regulators[i].name);
 238                         return PTR_ERR(rdev);
 239                 }
 240         }
 241 
 242         return 0;
 243 }
 244 
 245 static struct platform_driver sc2731_regulator_driver = {
 246         .driver = {
 247                 .name = "sc27xx-regulator",
 248         },
 249         .probe = sc2731_regulator_probe,
 250 };
 251 
 252 module_platform_driver(sc2731_regulator_driver);
 253 
 254 MODULE_AUTHOR("Chen Junhui <erick.chen@spreadtrum.com>");
 255 MODULE_DESCRIPTION("Spreadtrum SC2731 regulator driver");
 256 MODULE_LICENSE("GPL v2");

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