1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Regulators driver for Marvell 88PM800 4 * 5 * Copyright (C) 2012 Marvell International Ltd. 6 * Joseph(Yossi) Hanin <yhanin@marvell.com> 7 * Yi Zhang <yizhang@marvell.com> 8 */ 9 #include <linux/module.h> 10 #include <linux/moduleparam.h> 11 #include <linux/init.h> 12 #include <linux/err.h> 13 #include <linux/regmap.h> 14 #include <linux/regulator/driver.h> 15 #include <linux/regulator/machine.h> 16 #include <linux/mfd/88pm80x.h> 17 #include <linux/delay.h> 18 #include <linux/io.h> 19 #include <linux/of.h> 20 #include <linux/regulator/of_regulator.h> 21 22 /* LDO1 with DVC[0..3] */ 23 #define PM800_LDO1_VOUT (0x08) /* VOUT1 */ 24 #define PM800_LDO1_VOUT_2 (0x09) 25 #define PM800_LDO1_VOUT_3 (0x0A) 26 #define PM800_LDO2_VOUT (0x0B) 27 #define PM800_LDO3_VOUT (0x0C) 28 #define PM800_LDO4_VOUT (0x0D) 29 #define PM800_LDO5_VOUT (0x0E) 30 #define PM800_LDO6_VOUT (0x0F) 31 #define PM800_LDO7_VOUT (0x10) 32 #define PM800_LDO8_VOUT (0x11) 33 #define PM800_LDO9_VOUT (0x12) 34 #define PM800_LDO10_VOUT (0x13) 35 #define PM800_LDO11_VOUT (0x14) 36 #define PM800_LDO12_VOUT (0x15) 37 #define PM800_LDO13_VOUT (0x16) 38 #define PM800_LDO14_VOUT (0x17) 39 #define PM800_LDO15_VOUT (0x18) 40 #define PM800_LDO16_VOUT (0x19) 41 #define PM800_LDO17_VOUT (0x1A) 42 #define PM800_LDO18_VOUT (0x1B) 43 #define PM800_LDO19_VOUT (0x1C) 44 45 /* BUCK1 with DVC[0..3] */ 46 #define PM800_BUCK1 (0x3C) 47 #define PM800_BUCK1_1 (0x3D) 48 #define PM800_BUCK1_2 (0x3E) 49 #define PM800_BUCK1_3 (0x3F) 50 #define PM800_BUCK2 (0x40) 51 #define PM800_BUCK3 (0x41) 52 #define PM800_BUCK4 (0x42) 53 #define PM800_BUCK4_1 (0x43) 54 #define PM800_BUCK4_2 (0x44) 55 #define PM800_BUCK4_3 (0x45) 56 #define PM800_BUCK5 (0x46) 57 58 #define PM800_BUCK_ENA (0x50) 59 #define PM800_LDO_ENA1_1 (0x51) 60 #define PM800_LDO_ENA1_2 (0x52) 61 #define PM800_LDO_ENA1_3 (0x53) 62 63 #define PM800_LDO_ENA2_1 (0x56) 64 #define PM800_LDO_ENA2_2 (0x57) 65 #define PM800_LDO_ENA2_3 (0x58) 66 67 #define PM800_BUCK1_MISC1 (0x78) 68 #define PM800_BUCK3_MISC1 (0x7E) 69 #define PM800_BUCK4_MISC1 (0x81) 70 #define PM800_BUCK5_MISC1 (0x84) 71 72 struct pm800_regulator_info { 73 struct regulator_desc desc; 74 int max_ua; 75 }; 76 77 /* 78 * vreg - the buck regs string. 79 * ereg - the string for the enable register. 80 * ebit - the bit number in the enable register. 81 * amax - the current 82 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges, 83 * not the constant voltage table. 84 * n_volt - Number of available selectors 85 */ 86 #define PM800_BUCK(match, vreg, ereg, ebit, amax, volt_ranges, n_volt) \ 87 { \ 88 .desc = { \ 89 .name = #vreg, \ 90 .of_match = of_match_ptr(#match), \ 91 .regulators_node = of_match_ptr("regulators"), \ 92 .ops = &pm800_volt_range_ops, \ 93 .type = REGULATOR_VOLTAGE, \ 94 .id = PM800_ID_##vreg, \ 95 .owner = THIS_MODULE, \ 96 .n_voltages = n_volt, \ 97 .linear_ranges = volt_ranges, \ 98 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \ 99 .vsel_reg = PM800_##vreg, \ 100 .vsel_mask = 0x7f, \ 101 .enable_reg = PM800_##ereg, \ 102 .enable_mask = 1 << (ebit), \ 103 }, \ 104 .max_ua = (amax), \ 105 } 106 107 /* 108 * vreg - the LDO regs string 109 * ereg - the string for the enable register. 110 * ebit - the bit number in the enable register. 111 * amax - the current 112 * volt_table - the LDO voltage table 113 * For all the LDOes, there are too many ranges. Using volt_table will be 114 * simpler and faster. 115 */ 116 #define PM800_LDO(match, vreg, ereg, ebit, amax, ldo_volt_table) \ 117 { \ 118 .desc = { \ 119 .name = #vreg, \ 120 .of_match = of_match_ptr(#match), \ 121 .regulators_node = of_match_ptr("regulators"), \ 122 .ops = &pm800_volt_table_ops, \ 123 .type = REGULATOR_VOLTAGE, \ 124 .id = PM800_ID_##vreg, \ 125 .owner = THIS_MODULE, \ 126 .n_voltages = ARRAY_SIZE(ldo_volt_table), \ 127 .vsel_reg = PM800_##vreg##_VOUT, \ 128 .vsel_mask = 0xf, \ 129 .enable_reg = PM800_##ereg, \ 130 .enable_mask = 1 << (ebit), \ 131 .volt_table = ldo_volt_table, \ 132 }, \ 133 .max_ua = (amax), \ 134 } 135 136 /* Ranges are sorted in ascending order. */ 137 static const struct linear_range buck1_volt_range[] = { 138 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500), 139 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000), 140 }; 141 142 /* BUCK 2~5 have same ranges. */ 143 static const struct linear_range buck2_5_volt_range[] = { 144 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500), 145 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000), 146 }; 147 148 static const unsigned int ldo1_volt_table[] = { 149 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000, 150 1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000, 151 }; 152 153 static const unsigned int ldo2_volt_table[] = { 154 1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000, 155 }; 156 157 /* LDO 3~17 have same voltage table. */ 158 static const unsigned int ldo3_17_volt_table[] = { 159 1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000, 160 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, 161 }; 162 163 /* LDO 18~19 have same voltage table. */ 164 static const unsigned int ldo18_19_volt_table[] = { 165 1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000, 166 }; 167 168 static int pm800_get_current_limit(struct regulator_dev *rdev) 169 { 170 struct pm800_regulator_info *info = rdev_get_drvdata(rdev); 171 172 return info->max_ua; 173 } 174 175 static const struct regulator_ops pm800_volt_range_ops = { 176 .list_voltage = regulator_list_voltage_linear_range, 177 .map_voltage = regulator_map_voltage_linear_range, 178 .set_voltage_sel = regulator_set_voltage_sel_regmap, 179 .get_voltage_sel = regulator_get_voltage_sel_regmap, 180 .enable = regulator_enable_regmap, 181 .disable = regulator_disable_regmap, 182 .is_enabled = regulator_is_enabled_regmap, 183 .get_current_limit = pm800_get_current_limit, 184 }; 185 186 static const struct regulator_ops pm800_volt_table_ops = { 187 .list_voltage = regulator_list_voltage_table, 188 .map_voltage = regulator_map_voltage_iterate, 189 .set_voltage_sel = regulator_set_voltage_sel_regmap, 190 .get_voltage_sel = regulator_get_voltage_sel_regmap, 191 .enable = regulator_enable_regmap, 192 .disable = regulator_disable_regmap, 193 .is_enabled = regulator_is_enabled_regmap, 194 .get_current_limit = pm800_get_current_limit, 195 }; 196 197 /* The array is indexed by id(PM800_ID_XXX) */ 198 static struct pm800_regulator_info pm800_regulator_info[] = { 199 PM800_BUCK(buck1, BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55), 200 PM800_BUCK(buck2, BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73), 201 PM800_BUCK(buck3, BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73), 202 PM800_BUCK(buck4, BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73), 203 PM800_BUCK(buck5, BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73), 204 205 PM800_LDO(ldo1, LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table), 206 PM800_LDO(ldo2, LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table), 207 PM800_LDO(ldo3, LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table), 208 PM800_LDO(ldo4, LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table), 209 PM800_LDO(ldo5, LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table), 210 PM800_LDO(ldo6, LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table), 211 PM800_LDO(ldo7, LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table), 212 PM800_LDO(ldo8, LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table), 213 PM800_LDO(ldo9, LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table), 214 PM800_LDO(ldo10, LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table), 215 PM800_LDO(ldo11, LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table), 216 PM800_LDO(ldo12, LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table), 217 PM800_LDO(ldo13, LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table), 218 PM800_LDO(ldo14, LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table), 219 PM800_LDO(ldo15, LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table), 220 PM800_LDO(ldo16, LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table), 221 PM800_LDO(ldo17, LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table), 222 PM800_LDO(ldo18, LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table), 223 PM800_LDO(ldo19, LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table), 224 }; 225 226 static int pm800_regulator_probe(struct platform_device *pdev) 227 { 228 struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); 229 struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent); 230 struct regulator_config config = { }; 231 struct regulator_init_data *init_data; 232 int i, ret; 233 234 if (pdata && pdata->num_regulators) { 235 unsigned int count = 0; 236 237 /* Check whether num_regulator is valid. */ 238 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) { 239 if (pdata->regulators[i]) 240 count++; 241 } 242 if (count != pdata->num_regulators) 243 return -EINVAL; 244 } 245 246 config.dev = chip->dev; 247 config.regmap = chip->subchip->regmap_power; 248 for (i = 0; i < PM800_ID_RG_MAX; i++) { 249 struct regulator_dev *regulator; 250 251 if (pdata && pdata->num_regulators) { 252 init_data = pdata->regulators[i]; 253 if (!init_data) 254 continue; 255 256 config.init_data = init_data; 257 } 258 259 config.driver_data = &pm800_regulator_info[i]; 260 261 regulator = devm_regulator_register(&pdev->dev, 262 &pm800_regulator_info[i].desc, &config); 263 if (IS_ERR(regulator)) { 264 ret = PTR_ERR(regulator); 265 dev_err(&pdev->dev, "Failed to register %s\n", 266 pm800_regulator_info[i].desc.name); 267 return ret; 268 } 269 } 270 271 return 0; 272 } 273 274 static struct platform_driver pm800_regulator_driver = { 275 .driver = { 276 .name = "88pm80x-regulator", 277 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 278 }, 279 .probe = pm800_regulator_probe, 280 }; 281 282 module_platform_driver(pm800_regulator_driver); 283 284 MODULE_LICENSE("GPL"); 285 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>"); 286 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC"); 287 MODULE_ALIAS("platform:88pm800-regulator"); 288