1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Device driver for regulators in Hi6421V530 IC 4 // 5 // Copyright (c) <2017> HiSilicon Technologies Co., Ltd. 6 // http://www.hisilicon.com 7 // Copyright (c) <2017> Linaro Ltd. 8 // http://www.linaro.org 9 // 10 // Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com> 11 // Guodong Xu <guodong.xu@linaro.org> 12 13 #include <linux/mfd/hi6421-pmic.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/platform_device.h> 17 #include <linux/regmap.h> 18 #include <linux/regulator/driver.h> 19 20 /* 21 * struct hi6421v530_regulator_info - hi6421v530 regulator information 22 * @desc: regulator description 23 * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep 24 * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only 25 */ 26 struct hi6421v530_regulator_info { 27 struct regulator_desc rdesc; 28 u8 mode_mask; 29 u32 eco_microamp; 30 }; 31 32 /* HI6421v530 regulators */ 33 enum hi6421v530_regulator_id { 34 HI6421V530_LDO3, 35 HI6421V530_LDO9, 36 HI6421V530_LDO11, 37 HI6421V530_LDO15, 38 HI6421V530_LDO16, 39 }; 40 41 static const unsigned int ldo_3_voltages[] = { 42 1800000, 1825000, 1850000, 1875000, 43 1900000, 1925000, 1950000, 1975000, 44 2000000, 2025000, 2050000, 2075000, 45 2100000, 2125000, 2150000, 2200000, 46 }; 47 48 static const unsigned int ldo_9_11_voltages[] = { 49 1750000, 1800000, 1825000, 2800000, 50 2850000, 2950000, 3000000, 3300000, 51 }; 52 53 static const unsigned int ldo_15_16_voltages[] = { 54 1750000, 1800000, 2400000, 2600000, 55 2700000, 2850000, 2950000, 3000000, 56 }; 57 58 static const struct regulator_ops hi6421v530_ldo_ops; 59 60 #define HI6421V530_LDO_ENABLE_TIME (350) 61 62 /* 63 * _id - LDO id name string 64 * v_table - voltage table 65 * vreg - voltage select register 66 * vmask - voltage select mask 67 * ereg - enable register 68 * emask - enable mask 69 * odelay - off/on delay time in uS 70 * ecomask - eco mode mask 71 * ecoamp - eco mode load uppler limit in uA 72 */ 73 #define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \ 74 odelay, ecomask, ecoamp) { \ 75 .rdesc = { \ 76 .name = #_ID, \ 77 .of_match = of_match_ptr(#_ID), \ 78 .regulators_node = of_match_ptr("regulators"), \ 79 .ops = &hi6421v530_ldo_ops, \ 80 .type = REGULATOR_VOLTAGE, \ 81 .id = HI6421V530_##_ID, \ 82 .owner = THIS_MODULE, \ 83 .n_voltages = ARRAY_SIZE(v_table), \ 84 .volt_table = v_table, \ 85 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ 86 .vsel_mask = vmask, \ 87 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ 88 .enable_mask = emask, \ 89 .enable_time = HI6421V530_LDO_ENABLE_TIME, \ 90 .off_on_delay = odelay, \ 91 }, \ 92 .mode_mask = ecomask, \ 93 .eco_microamp = ecoamp, \ 94 } 95 96 /* HI6421V530 regulator information */ 97 98 static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = { 99 HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2, 100 20000, 0x6, 8000), 101 HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2, 102 40000, 0x6, 8000), 103 HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2, 104 40000, 0x6, 8000), 105 HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2, 106 40000, 0x6, 8000), 107 HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2, 108 40000, 0x6, 8000), 109 }; 110 111 static unsigned int hi6421v530_regulator_ldo_get_mode( 112 struct regulator_dev *rdev) 113 { 114 struct hi6421v530_regulator_info *info; 115 unsigned int reg_val; 116 117 info = rdev_get_drvdata(rdev); 118 regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); 119 120 if (reg_val & (info->mode_mask)) 121 return REGULATOR_MODE_IDLE; 122 123 return REGULATOR_MODE_NORMAL; 124 } 125 126 static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev, 127 unsigned int mode) 128 { 129 struct hi6421v530_regulator_info *info; 130 unsigned int new_mode; 131 132 info = rdev_get_drvdata(rdev); 133 switch (mode) { 134 case REGULATOR_MODE_NORMAL: 135 new_mode = 0; 136 break; 137 case REGULATOR_MODE_IDLE: 138 new_mode = info->mode_mask; 139 break; 140 default: 141 return -EINVAL; 142 } 143 144 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 145 info->mode_mask, new_mode); 146 147 return 0; 148 } 149 150 151 static const struct regulator_ops hi6421v530_ldo_ops = { 152 .is_enabled = regulator_is_enabled_regmap, 153 .enable = regulator_enable_regmap, 154 .disable = regulator_disable_regmap, 155 .list_voltage = regulator_list_voltage_table, 156 .map_voltage = regulator_map_voltage_ascend, 157 .get_voltage_sel = regulator_get_voltage_sel_regmap, 158 .set_voltage_sel = regulator_set_voltage_sel_regmap, 159 .get_mode = hi6421v530_regulator_ldo_get_mode, 160 .set_mode = hi6421v530_regulator_ldo_set_mode, 161 }; 162 163 static int hi6421v530_regulator_probe(struct platform_device *pdev) 164 { 165 struct hi6421_pmic *pmic; 166 struct regulator_dev *rdev; 167 struct regulator_config config = { }; 168 unsigned int i; 169 170 pmic = dev_get_drvdata(pdev->dev.parent); 171 if (!pmic) { 172 dev_err(&pdev->dev, "no pmic in the regulator parent node\n"); 173 return -ENODEV; 174 } 175 176 for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) { 177 config.dev = pdev->dev.parent; 178 config.regmap = pmic->regmap; 179 config.driver_data = &hi6421v530_regulator_info[i]; 180 181 rdev = devm_regulator_register(&pdev->dev, 182 &hi6421v530_regulator_info[i].rdesc, 183 &config); 184 if (IS_ERR(rdev)) { 185 dev_err(&pdev->dev, "failed to register regulator %s\n", 186 hi6421v530_regulator_info[i].rdesc.name); 187 return PTR_ERR(rdev); 188 } 189 } 190 return 0; 191 } 192 193 static const struct platform_device_id hi6421v530_regulator_table[] = { 194 { .name = "hi6421v530-regulator" }, 195 {}, 196 }; 197 MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table); 198 199 static struct platform_driver hi6421v530_regulator_driver = { 200 .id_table = hi6421v530_regulator_table, 201 .driver = { 202 .name = "hi6421v530-regulator", 203 }, 204 .probe = hi6421v530_regulator_probe, 205 }; 206 module_platform_driver(hi6421v530_regulator_driver); 207 208 MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>"); 209 MODULE_DESCRIPTION("Hi6421v530 regulator driver"); 210 MODULE_LICENSE("GPL v2"); 211