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