1 /* 2 * Device driver for regulators in Hi6421V530 IC 3 * 4 * Copyright (c) <2017> HiSilicon Technologies Co., Ltd. 5 * http://www.hisilicon.com 6 * Copyright (c) <2017> Linaro Ltd. 7 * http://www.linaro.org 8 * 9 * Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com> 10 * Guodong Xu <guodong.xu@linaro.org> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/mfd/hi6421-pmic.h> 18 #include <linux/module.h> 19 #include <linux/of.h> 20 #include <linux/platform_device.h> 21 #include <linux/regmap.h> 22 #include <linux/regulator/driver.h> 23 24 /* 25 * struct hi6421v530_regulator_info - hi6421v530 regulator information 26 * @desc: regulator description 27 * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep 28 * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only 29 */ 30 struct hi6421v530_regulator_info { 31 struct regulator_desc rdesc; 32 u8 mode_mask; 33 u32 eco_microamp; 34 }; 35 36 /* HI6421v530 regulators */ 37 enum hi6421v530_regulator_id { 38 HI6421V530_LDO3, 39 HI6421V530_LDO9, 40 HI6421V530_LDO11, 41 HI6421V530_LDO15, 42 HI6421V530_LDO16, 43 }; 44 45 static const unsigned int ldo_3_voltages[] = { 46 1800000, 1825000, 1850000, 1875000, 47 1900000, 1925000, 1950000, 1975000, 48 2000000, 2025000, 2050000, 2075000, 49 2100000, 2125000, 2150000, 2200000, 50 }; 51 52 static const unsigned int ldo_9_11_voltages[] = { 53 1750000, 1800000, 1825000, 2800000, 54 2850000, 2950000, 3000000, 3300000, 55 }; 56 57 static const unsigned int ldo_15_16_voltages[] = { 58 1750000, 1800000, 2400000, 2600000, 59 2700000, 2850000, 2950000, 3000000, 60 }; 61 62 static const struct regulator_ops hi6421v530_ldo_ops; 63 64 #define HI6421V530_LDO_ENABLE_TIME (350) 65 66 /* 67 * _id - LDO id name string 68 * v_table - voltage table 69 * vreg - voltage select register 70 * vmask - voltage select mask 71 * ereg - enable register 72 * emask - enable mask 73 * odelay - off/on delay time in uS 74 * ecomask - eco mode mask 75 * ecoamp - eco mode load uppler limit in uA 76 */ 77 #define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \ 78 odelay, ecomask, ecoamp) { \ 79 .rdesc = { \ 80 .name = #_ID, \ 81 .of_match = of_match_ptr(#_ID), \ 82 .regulators_node = of_match_ptr("regulators"), \ 83 .ops = &hi6421v530_ldo_ops, \ 84 .type = REGULATOR_VOLTAGE, \ 85 .id = HI6421V530_##_ID, \ 86 .owner = THIS_MODULE, \ 87 .n_voltages = ARRAY_SIZE(v_table), \ 88 .volt_table = v_table, \ 89 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ 90 .vsel_mask = vmask, \ 91 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ 92 .enable_mask = emask, \ 93 .enable_time = HI6421V530_LDO_ENABLE_TIME, \ 94 .off_on_delay = odelay, \ 95 }, \ 96 .mode_mask = ecomask, \ 97 .eco_microamp = ecoamp, \ 98 } 99 100 /* HI6421V530 regulator information */ 101 102 static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = { 103 HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2, 104 20000, 0x6, 8000), 105 HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2, 106 40000, 0x6, 8000), 107 HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2, 108 40000, 0x6, 8000), 109 HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2, 110 40000, 0x6, 8000), 111 HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2, 112 40000, 0x6, 8000), 113 }; 114 115 static unsigned int hi6421v530_regulator_ldo_get_mode( 116 struct regulator_dev *rdev) 117 { 118 struct hi6421v530_regulator_info *info; 119 unsigned int reg_val; 120 121 info = rdev_get_drvdata(rdev); 122 regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); 123 124 if (reg_val & (info->mode_mask)) 125 return REGULATOR_MODE_IDLE; 126 127 return REGULATOR_MODE_NORMAL; 128 } 129 130 static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev, 131 unsigned int mode) 132 { 133 struct hi6421v530_regulator_info *info; 134 unsigned int new_mode; 135 136 info = rdev_get_drvdata(rdev); 137 switch (mode) { 138 case REGULATOR_MODE_NORMAL: 139 new_mode = 0; 140 break; 141 case REGULATOR_MODE_IDLE: 142 new_mode = info->mode_mask; 143 break; 144 default: 145 return -EINVAL; 146 } 147 148 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 149 info->mode_mask, new_mode); 150 151 return 0; 152 } 153 154 155 static const struct regulator_ops hi6421v530_ldo_ops = { 156 .is_enabled = regulator_is_enabled_regmap, 157 .enable = regulator_enable_regmap, 158 .disable = regulator_disable_regmap, 159 .list_voltage = regulator_list_voltage_table, 160 .map_voltage = regulator_map_voltage_ascend, 161 .get_voltage_sel = regulator_get_voltage_sel_regmap, 162 .set_voltage_sel = regulator_set_voltage_sel_regmap, 163 .get_mode = hi6421v530_regulator_ldo_get_mode, 164 .set_mode = hi6421v530_regulator_ldo_set_mode, 165 }; 166 167 static int hi6421v530_regulator_probe(struct platform_device *pdev) 168 { 169 struct hi6421_pmic *pmic; 170 struct regulator_dev *rdev; 171 struct regulator_config config = { }; 172 unsigned int i; 173 174 pmic = dev_get_drvdata(pdev->dev.parent); 175 if (!pmic) { 176 dev_err(&pdev->dev, "no pmic in the regulator parent node\n"); 177 return -ENODEV; 178 } 179 180 for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) { 181 config.dev = pdev->dev.parent; 182 config.regmap = pmic->regmap; 183 config.driver_data = &hi6421v530_regulator_info[i]; 184 185 rdev = devm_regulator_register(&pdev->dev, 186 &hi6421v530_regulator_info[i].rdesc, 187 &config); 188 if (IS_ERR(rdev)) { 189 dev_err(&pdev->dev, "failed to register regulator %s\n", 190 hi6421v530_regulator_info[i].rdesc.name); 191 return PTR_ERR(rdev); 192 } 193 } 194 return 0; 195 } 196 197 static const struct platform_device_id hi6421v530_regulator_table[] = { 198 { .name = "hi6421v530-regulator" }, 199 {}, 200 }; 201 MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table); 202 203 static struct platform_driver hi6421v530_regulator_driver = { 204 .id_table = hi6421v530_regulator_table, 205 .driver = { 206 .name = "hi6421v530-regulator", 207 }, 208 .probe = hi6421v530_regulator_probe, 209 }; 210 module_platform_driver(hi6421v530_regulator_driver); 211 212 MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>"); 213 MODULE_DESCRIPTION("Hi6421v530 regulator driver"); 214 MODULE_LICENSE("GPL v2"); 215