1 /* 2 * AXP20x regulators driver. 3 * 4 * Copyright (C) 2013 Carlo Caione <carlo@caione.org> 5 * 6 * This file is subject to the terms and conditions of the GNU General 7 * Public License. See the file "COPYING" in the main directory of this 8 * archive for more details. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 #include <linux/err.h> 17 #include <linux/init.h> 18 #include <linux/module.h> 19 #include <linux/of.h> 20 #include <linux/of_device.h> 21 #include <linux/platform_device.h> 22 #include <linux/regmap.h> 23 #include <linux/mfd/axp20x.h> 24 #include <linux/regulator/driver.h> 25 #include <linux/regulator/of_regulator.h> 26 27 #define AXP20X_IO_ENABLED 0x03 28 #define AXP20X_IO_DISABLED 0x07 29 30 #define AXP20X_WORKMODE_DCDC2_MASK BIT(2) 31 #define AXP20X_WORKMODE_DCDC3_MASK BIT(1) 32 33 #define AXP20X_FREQ_DCDC_MASK 0x0f 34 35 #define AXP20X_DESC_IO(_id, _supply, _min, _max, _step, _vreg, _vmask, _ereg, \ 36 _emask, _enable_val, _disable_val) \ 37 [AXP20X_##_id] = { \ 38 .name = #_id, \ 39 .supply_name = (_supply), \ 40 .type = REGULATOR_VOLTAGE, \ 41 .id = AXP20X_##_id, \ 42 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 43 .owner = THIS_MODULE, \ 44 .min_uV = (_min) * 1000, \ 45 .uV_step = (_step) * 1000, \ 46 .vsel_reg = (_vreg), \ 47 .vsel_mask = (_vmask), \ 48 .enable_reg = (_ereg), \ 49 .enable_mask = (_emask), \ 50 .enable_val = (_enable_val), \ 51 .disable_val = (_disable_val), \ 52 .ops = &axp20x_ops, \ 53 } 54 55 #define AXP20X_DESC(_id, _supply, _min, _max, _step, _vreg, _vmask, _ereg, \ 56 _emask) \ 57 [AXP20X_##_id] = { \ 58 .name = #_id, \ 59 .supply_name = (_supply), \ 60 .type = REGULATOR_VOLTAGE, \ 61 .id = AXP20X_##_id, \ 62 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 63 .owner = THIS_MODULE, \ 64 .min_uV = (_min) * 1000, \ 65 .uV_step = (_step) * 1000, \ 66 .vsel_reg = (_vreg), \ 67 .vsel_mask = (_vmask), \ 68 .enable_reg = (_ereg), \ 69 .enable_mask = (_emask), \ 70 .ops = &axp20x_ops, \ 71 } 72 73 #define AXP20X_DESC_FIXED(_id, _supply, _volt) \ 74 [AXP20X_##_id] = { \ 75 .name = #_id, \ 76 .supply_name = (_supply), \ 77 .type = REGULATOR_VOLTAGE, \ 78 .id = AXP20X_##_id, \ 79 .n_voltages = 1, \ 80 .owner = THIS_MODULE, \ 81 .min_uV = (_volt) * 1000, \ 82 .ops = &axp20x_ops_fixed \ 83 } 84 85 #define AXP20X_DESC_TABLE(_id, _supply, _table, _vreg, _vmask, _ereg, _emask) \ 86 [AXP20X_##_id] = { \ 87 .name = #_id, \ 88 .supply_name = (_supply), \ 89 .type = REGULATOR_VOLTAGE, \ 90 .id = AXP20X_##_id, \ 91 .n_voltages = ARRAY_SIZE(_table), \ 92 .owner = THIS_MODULE, \ 93 .vsel_reg = (_vreg), \ 94 .vsel_mask = (_vmask), \ 95 .enable_reg = (_ereg), \ 96 .enable_mask = (_emask), \ 97 .volt_table = (_table), \ 98 .ops = &axp20x_ops_table, \ 99 } 100 101 static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000, 102 1700000, 1800000, 1900000, 2000000, 2500000, 103 2700000, 2800000, 3000000, 3100000, 3200000, 104 3300000 }; 105 106 static struct regulator_ops axp20x_ops_fixed = { 107 .list_voltage = regulator_list_voltage_linear, 108 }; 109 110 static struct regulator_ops axp20x_ops_table = { 111 .set_voltage_sel = regulator_set_voltage_sel_regmap, 112 .get_voltage_sel = regulator_get_voltage_sel_regmap, 113 .list_voltage = regulator_list_voltage_table, 114 .map_voltage = regulator_map_voltage_ascend, 115 .enable = regulator_enable_regmap, 116 .disable = regulator_disable_regmap, 117 .is_enabled = regulator_is_enabled_regmap, 118 }; 119 120 static struct regulator_ops axp20x_ops = { 121 .set_voltage_sel = regulator_set_voltage_sel_regmap, 122 .get_voltage_sel = regulator_get_voltage_sel_regmap, 123 .list_voltage = regulator_list_voltage_linear, 124 .enable = regulator_enable_regmap, 125 .disable = regulator_disable_regmap, 126 .is_enabled = regulator_is_enabled_regmap, 127 }; 128 129 static const struct regulator_desc axp20x_regulators[] = { 130 AXP20X_DESC(DCDC2, "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, 0x3f, 131 AXP20X_PWR_OUT_CTRL, 0x10), 132 AXP20X_DESC(DCDC3, "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, 0x7f, 133 AXP20X_PWR_OUT_CTRL, 0x02), 134 AXP20X_DESC_FIXED(LDO1, "acin", 1300), 135 AXP20X_DESC(LDO2, "ldo24in", 1800, 3300, 100, AXP20X_LDO24_V_OUT, 0xf0, 136 AXP20X_PWR_OUT_CTRL, 0x04), 137 AXP20X_DESC(LDO3, "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, 0x7f, 138 AXP20X_PWR_OUT_CTRL, 0x40), 139 AXP20X_DESC_TABLE(LDO4, "ldo24in", axp20x_ldo4_data, AXP20X_LDO24_V_OUT, 0x0f, 140 AXP20X_PWR_OUT_CTRL, 0x08), 141 AXP20X_DESC_IO(LDO5, "ldo5in", 1800, 3300, 100, AXP20X_LDO5_V_OUT, 0xf0, 142 AXP20X_GPIO0_CTRL, 0x07, AXP20X_IO_ENABLED, 143 AXP20X_IO_DISABLED), 144 }; 145 146 #define AXP_MATCH(_name, _id) \ 147 [AXP20X_##_id] = { \ 148 .name = #_name, \ 149 .driver_data = (void *) &axp20x_regulators[AXP20X_##_id], \ 150 } 151 152 static struct of_regulator_match axp20x_matches[] = { 153 AXP_MATCH(dcdc2, DCDC2), 154 AXP_MATCH(dcdc3, DCDC3), 155 AXP_MATCH(ldo1, LDO1), 156 AXP_MATCH(ldo2, LDO2), 157 AXP_MATCH(ldo3, LDO3), 158 AXP_MATCH(ldo4, LDO4), 159 AXP_MATCH(ldo5, LDO5), 160 }; 161 162 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) 163 { 164 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 165 166 if (dcdcfreq < 750) { 167 dcdcfreq = 750; 168 dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n"); 169 } 170 171 if (dcdcfreq > 1875) { 172 dcdcfreq = 1875; 173 dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n"); 174 } 175 176 dcdcfreq = (dcdcfreq - 750) / 75; 177 178 return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ, 179 AXP20X_FREQ_DCDC_MASK, dcdcfreq); 180 } 181 182 static int axp20x_regulator_parse_dt(struct platform_device *pdev) 183 { 184 struct device_node *np, *regulators; 185 int ret; 186 u32 dcdcfreq; 187 188 np = of_node_get(pdev->dev.parent->of_node); 189 if (!np) 190 return 0; 191 192 regulators = of_get_child_by_name(np, "regulators"); 193 if (!regulators) { 194 dev_warn(&pdev->dev, "regulators node not found\n"); 195 } else { 196 ret = of_regulator_match(&pdev->dev, regulators, axp20x_matches, 197 ARRAY_SIZE(axp20x_matches)); 198 if (ret < 0) { 199 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret); 200 return ret; 201 } 202 203 dcdcfreq = 1500; 204 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq); 205 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq); 206 if (ret < 0) { 207 dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret); 208 return ret; 209 } 210 211 of_node_put(regulators); 212 } 213 214 return 0; 215 } 216 217 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode) 218 { 219 unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK; 220 221 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3)) 222 return -EINVAL; 223 224 if (id == AXP20X_DCDC3) 225 mask = AXP20X_WORKMODE_DCDC3_MASK; 226 227 workmode <<= ffs(mask) - 1; 228 229 return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode); 230 } 231 232 static int axp20x_regulator_probe(struct platform_device *pdev) 233 { 234 struct regulator_dev *rdev; 235 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 236 struct regulator_config config = { }; 237 struct regulator_init_data *init_data; 238 int ret, i; 239 u32 workmode; 240 241 ret = axp20x_regulator_parse_dt(pdev); 242 if (ret) 243 return ret; 244 245 for (i = 0; i < AXP20X_REG_ID_MAX; i++) { 246 init_data = axp20x_matches[i].init_data; 247 248 config.dev = pdev->dev.parent; 249 config.init_data = init_data; 250 config.regmap = axp20x->regmap; 251 config.of_node = axp20x_matches[i].of_node; 252 253 rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i], 254 &config); 255 if (IS_ERR(rdev)) { 256 dev_err(&pdev->dev, "Failed to register %s\n", 257 axp20x_regulators[i].name); 258 259 return PTR_ERR(rdev); 260 } 261 262 ret = of_property_read_u32(axp20x_matches[i].of_node, "x-powers,dcdc-workmode", 263 &workmode); 264 if (!ret) { 265 if (axp20x_set_dcdc_workmode(rdev, i, workmode)) 266 dev_err(&pdev->dev, "Failed to set workmode on %s\n", 267 axp20x_regulators[i].name); 268 } 269 } 270 271 return 0; 272 } 273 274 static struct platform_driver axp20x_regulator_driver = { 275 .probe = axp20x_regulator_probe, 276 .driver = { 277 .name = "axp20x-regulator", 278 }, 279 }; 280 281 module_platform_driver(axp20x_regulator_driver); 282 283 MODULE_LICENSE("GPL v2"); 284 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 285 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC"); 286