Tom Rix | bbc7ba0 | 2022-03-05 08:24:38 -0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Erick Chen | 433c9bb | 2017-12-05 14:35:46 +0800 | [diff] [blame] | 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 | */ |
Axel Lin | fa32f7a | 2018-01-01 20:38:50 +0800 | [diff] [blame] | 16 | #define SC2731_PWR_WR_PROT 0xf0c |
| 17 | #define SC2731_WR_UNLOCK_VALUE 0x6e7f |
Erick Chen | 433c9bb | 2017-12-05 14:35:46 +0800 | [diff] [blame] | 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 | |
Axel Lin | 883ce24 | 2019-03-26 07:57:39 +0800 | [diff] [blame] | 149 | static const struct regulator_desc regulators[] = { |
Erick Chen | 433c9bb | 2017-12-05 14:35:46 +0800 | [diff] [blame] | 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 | { |
Axel Lin | fa32f7a | 2018-01-01 20:38:50 +0800 | [diff] [blame] | 206 | return regmap_write(regmap, SC2731_PWR_WR_PROT, |
| 207 | SC2731_WR_UNLOCK_VALUE); |
Erick Chen | 433c9bb | 2017-12-05 14:35:46 +0800 | [diff] [blame] | 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"); |