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, ®ulators[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"); 257