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, _match, _supply, _min, _max, _step, _vreg, _vmask, \ 36 _ereg, _emask, _enable_val, _disable_val) \ 37 [AXP20X_##_id] = { \ 38 .name = #_id, \ 39 .supply_name = (_supply), \ 40 .of_match = of_match_ptr(_match), \ 41 .regulators_node = of_match_ptr("regulators"), \ 42 .type = REGULATOR_VOLTAGE, \ 43 .id = AXP20X_##_id, \ 44 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 45 .owner = THIS_MODULE, \ 46 .min_uV = (_min) * 1000, \ 47 .uV_step = (_step) * 1000, \ 48 .vsel_reg = (_vreg), \ 49 .vsel_mask = (_vmask), \ 50 .enable_reg = (_ereg), \ 51 .enable_mask = (_emask), \ 52 .enable_val = (_enable_val), \ 53 .disable_val = (_disable_val), \ 54 .ops = &axp20x_ops, \ 55 } 56 57 #define AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \ 58 _ereg, _emask) \ 59 [AXP20X_##_id] = { \ 60 .name = #_id, \ 61 .supply_name = (_supply), \ 62 .of_match = of_match_ptr(_match), \ 63 .regulators_node = of_match_ptr("regulators"), \ 64 .type = REGULATOR_VOLTAGE, \ 65 .id = AXP20X_##_id, \ 66 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 67 .owner = THIS_MODULE, \ 68 .min_uV = (_min) * 1000, \ 69 .uV_step = (_step) * 1000, \ 70 .vsel_reg = (_vreg), \ 71 .vsel_mask = (_vmask), \ 72 .enable_reg = (_ereg), \ 73 .enable_mask = (_emask), \ 74 .ops = &axp20x_ops, \ 75 } 76 77 #define AXP20X_DESC_FIXED(_id, _match, _supply, _volt) \ 78 [AXP20X_##_id] = { \ 79 .name = #_id, \ 80 .supply_name = (_supply), \ 81 .of_match = of_match_ptr(_match), \ 82 .regulators_node = of_match_ptr("regulators"), \ 83 .type = REGULATOR_VOLTAGE, \ 84 .id = AXP20X_##_id, \ 85 .n_voltages = 1, \ 86 .owner = THIS_MODULE, \ 87 .min_uV = (_volt) * 1000, \ 88 .ops = &axp20x_ops_fixed \ 89 } 90 91 #define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg, \ 92 _emask) \ 93 [AXP20X_##_id] = { \ 94 .name = #_id, \ 95 .supply_name = (_supply), \ 96 .of_match = of_match_ptr(_match), \ 97 .regulators_node = of_match_ptr("regulators"), \ 98 .type = REGULATOR_VOLTAGE, \ 99 .id = AXP20X_##_id, \ 100 .n_voltages = ARRAY_SIZE(_table), \ 101 .owner = THIS_MODULE, \ 102 .vsel_reg = (_vreg), \ 103 .vsel_mask = (_vmask), \ 104 .enable_reg = (_ereg), \ 105 .enable_mask = (_emask), \ 106 .volt_table = (_table), \ 107 .ops = &axp20x_ops_table, \ 108 } 109 110 static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000, 111 1700000, 1800000, 1900000, 2000000, 2500000, 112 2700000, 2800000, 3000000, 3100000, 3200000, 113 3300000 }; 114 115 static struct regulator_ops axp20x_ops_fixed = { 116 .list_voltage = regulator_list_voltage_linear, 117 }; 118 119 static struct regulator_ops axp20x_ops_table = { 120 .set_voltage_sel = regulator_set_voltage_sel_regmap, 121 .get_voltage_sel = regulator_get_voltage_sel_regmap, 122 .list_voltage = regulator_list_voltage_table, 123 .map_voltage = regulator_map_voltage_ascend, 124 .enable = regulator_enable_regmap, 125 .disable = regulator_disable_regmap, 126 .is_enabled = regulator_is_enabled_regmap, 127 }; 128 129 static struct regulator_ops axp20x_ops = { 130 .set_voltage_sel = regulator_set_voltage_sel_regmap, 131 .get_voltage_sel = regulator_get_voltage_sel_regmap, 132 .list_voltage = regulator_list_voltage_linear, 133 .enable = regulator_enable_regmap, 134 .disable = regulator_disable_regmap, 135 .is_enabled = regulator_is_enabled_regmap, 136 }; 137 138 static const struct regulator_desc axp20x_regulators[] = { 139 AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, 140 0x3f, AXP20X_PWR_OUT_CTRL, 0x10), 141 AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, 142 0x7f, AXP20X_PWR_OUT_CTRL, 0x02), 143 AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300), 144 AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100, 145 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04), 146 AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, 147 0x7f, AXP20X_PWR_OUT_CTRL, 0x40), 148 AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data, 149 AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08), 150 AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100, 151 AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07, 152 AXP20X_IO_ENABLED, AXP20X_IO_DISABLED), 153 }; 154 155 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) 156 { 157 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 158 159 if (dcdcfreq < 750) { 160 dcdcfreq = 750; 161 dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n"); 162 } 163 164 if (dcdcfreq > 1875) { 165 dcdcfreq = 1875; 166 dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n"); 167 } 168 169 dcdcfreq = (dcdcfreq - 750) / 75; 170 171 return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ, 172 AXP20X_FREQ_DCDC_MASK, dcdcfreq); 173 } 174 175 static int axp20x_regulator_parse_dt(struct platform_device *pdev) 176 { 177 struct device_node *np, *regulators; 178 int ret; 179 u32 dcdcfreq; 180 181 np = of_node_get(pdev->dev.parent->of_node); 182 if (!np) 183 return 0; 184 185 regulators = of_get_child_by_name(np, "regulators"); 186 if (!regulators) { 187 dev_warn(&pdev->dev, "regulators node not found\n"); 188 } else { 189 dcdcfreq = 1500; 190 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq); 191 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq); 192 if (ret < 0) { 193 dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret); 194 return ret; 195 } 196 197 of_node_put(regulators); 198 } 199 200 return 0; 201 } 202 203 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode) 204 { 205 unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK; 206 207 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3)) 208 return -EINVAL; 209 210 if (id == AXP20X_DCDC3) 211 mask = AXP20X_WORKMODE_DCDC3_MASK; 212 213 workmode <<= ffs(mask) - 1; 214 215 return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode); 216 } 217 218 static int axp20x_regulator_probe(struct platform_device *pdev) 219 { 220 struct regulator_dev *rdev; 221 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 222 struct regulator_config config = { 223 .dev = pdev->dev.parent, 224 .regmap = axp20x->regmap, 225 }; 226 int ret, i; 227 u32 workmode; 228 229 /* This only sets the dcdc freq. Ignore any errors */ 230 axp20x_regulator_parse_dt(pdev); 231 232 for (i = 0; i < AXP20X_REG_ID_MAX; i++) { 233 rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i], 234 &config); 235 if (IS_ERR(rdev)) { 236 dev_err(&pdev->dev, "Failed to register %s\n", 237 axp20x_regulators[i].name); 238 239 return PTR_ERR(rdev); 240 } 241 242 ret = of_property_read_u32(rdev->dev.of_node, 243 "x-powers,dcdc-workmode", 244 &workmode); 245 if (!ret) { 246 if (axp20x_set_dcdc_workmode(rdev, i, workmode)) 247 dev_err(&pdev->dev, "Failed to set workmode on %s\n", 248 axp20x_regulators[i].name); 249 } 250 } 251 252 return 0; 253 } 254 255 static struct platform_driver axp20x_regulator_driver = { 256 .probe = axp20x_regulator_probe, 257 .driver = { 258 .name = "axp20x-regulator", 259 }, 260 }; 261 262 module_platform_driver(axp20x_regulator_driver); 263 264 MODULE_LICENSE("GPL v2"); 265 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 266 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC"); 267