drivers/regulator/hi655x-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Device driver for regulators in Hi655x IC
   4 //
   5 // Copyright (c) 2016 Hisilicon.
   6 //
   7 // Authors:
   8 // Chen Feng <puck.chen@hisilicon.com>
   9 // Fei  Wang <w.f@huawei.com>
  10
  11 #include <linux/bitops.h>
  12 #include <linux/device.h>
  13 #include <linux/err.h>
  14 #include <linux/module.h>
  15 #include <linux/io.h>
  16 #include <linux/of.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/regmap.h>
  19 #include <linux/regulator/driver.h>
  20 #include <linux/regulator/machine.h>
  21 #include <linux/regulator/of_regulator.h>
  22 #include <linux/mfd/hi655x-pmic.h>
  23
  24 struct hi655x_regulator {
  25         unsigned int disable_reg;
  26         unsigned int status_reg;
  27         struct regulator_desc rdesc;
  28 };
  29
  30 /* LDO7 & LDO10 */
  31 static const unsigned int ldo7_voltages[] = {
  32         1800000, 1850000, 2850000, 2900000,
  33         3000000, 3100000, 3200000, 3300000,
  34 };
  35
  36 static const unsigned int ldo19_voltages[] = {
  37         1800000, 1850000, 1900000, 1750000,
  38         2800000, 2850000, 2900000, 3000000,
  39 };
  40
  41 static const unsigned int ldo22_voltages[] = {
  42          900000, 1000000, 1050000, 1100000,
  43         1150000, 1175000, 1185000, 1200000,
  44 };
  45
  46 enum hi655x_regulator_id {
  47         HI655X_LDO0,
  48         HI655X_LDO1,
  49         HI655X_LDO2,
  50         HI655X_LDO3,
  51         HI655X_LDO4,
  52         HI655X_LDO5,
  53         HI655X_LDO6,
  54         HI655X_LDO7,
  55         HI655X_LDO8,
  56         HI655X_LDO9,
  57         HI655X_LDO10,
  58         HI655X_LDO11,
  59         HI655X_LDO12,
  60         HI655X_LDO13,
  61         HI655X_LDO14,
  62         HI655X_LDO15,
  63         HI655X_LDO16,
  64         HI655X_LDO17,
  65         HI655X_LDO18,
  66         HI655X_LDO19,
  67         HI655X_LDO20,
  68         HI655X_LDO21,
  69         HI655X_LDO22,
  70 };
  71
  72 static int hi655x_is_enabled(struct regulator_dev *rdev)
  73 {
  74         unsigned int value = 0;
  75         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
  76
  77         regmap_read(rdev->regmap, regulator->status_reg, &value);
  78         return (value & rdev->desc->enable_mask);
  79 }
  80
  81 static int hi655x_disable(struct regulator_dev *rdev)
  82 {
  83         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
  84
  85         return regmap_write(rdev->regmap, regulator->disable_reg,
  86                             rdev->desc->enable_mask);
  87 }
  88
  89 static const struct regulator_ops hi655x_regulator_ops = {
  90         .enable = regulator_enable_regmap,
  91         .disable = hi655x_disable,
  92         .is_enabled = hi655x_is_enabled,
  93         .list_voltage = regulator_list_voltage_table,
  94         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  95         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  96 };
  97
  98 static const struct regulator_ops hi655x_ldo_linear_ops = {
  99         .enable = regulator_enable_regmap,
 100         .disable = hi655x_disable,
 101         .is_enabled = hi655x_is_enabled,
 102         .list_voltage = regulator_list_voltage_linear,
 103         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 104         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 105 };
 106
 107 #define HI655X_LDO(_ID, vreg, vmask, ereg, dreg,                 \
 108                    sreg, cmask, vtable) {                        \
 109         .rdesc = {                                               \
 110                 .name            = #_ID,                         \
 111                 .of_match        = of_match_ptr(#_ID),           \
 112                 .ops             = &hi655x_regulator_ops,        \
 113                 .regulators_node = of_match_ptr("regulators"),   \
 114                 .type            = REGULATOR_VOLTAGE,            \
 115                 .id              = HI655X_##_ID,                 \
 116                 .owner           = THIS_MODULE,                  \
 117                 .n_voltages      = ARRAY_SIZE(vtable),           \
 118                 .volt_table      = vtable,                       \
 119                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
 120                 .vsel_mask       = vmask,                        \
 121                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
 122                 .enable_mask     = BIT(cmask),                   \
 123         },                                                       \
 124         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
 125         .status_reg = HI655X_BUS_ADDR(sreg),                     \
 126 }
 127
 128 #define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg,          \
 129                           sreg, cmask, minv, nvolt, vstep) {     \
 130         .rdesc = {                                               \
 131                 .name            = #_ID,                         \
 132                 .of_match        = of_match_ptr(#_ID),           \
 133                 .ops             = &hi655x_ldo_linear_ops,       \
 134                 .regulators_node = of_match_ptr("regulators"),   \
 135                 .type            = REGULATOR_VOLTAGE,            \
 136                 .id              = HI655X_##_ID,                 \
 137                 .owner           = THIS_MODULE,                  \
 138                 .min_uV          = minv,                         \
 139                 .n_voltages      = nvolt,                        \
 140                 .uV_step         = vstep,                        \
 141                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
 142                 .vsel_mask       = vmask,                        \
 143                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
 144                 .enable_mask     = BIT(cmask),                   \
 145         },                                                       \
 146         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
 147         .status_reg = HI655X_BUS_ADDR(sreg),                     \
 148 }
 149
 150 static const struct hi655x_regulator regulators[] = {
 151         HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
 152                           2500000, 8, 100000),
 153         HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
 154         HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
 155         HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
 156                           1600000, 8, 50000),
 157         HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
 158                           2500000, 8, 100000),
 159         HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
 160                           1600000, 8, 50000),
 161         HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
 162                           2500000, 8, 100000),
 163         HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
 164         HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
 165                           1650000, 8, 50000),
 166         HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
 167 };
 168
 169 static int hi655x_regulator_probe(struct platform_device *pdev)
 170 {
 171         unsigned int i;
 172         struct hi655x_regulator *regulator;
 173         struct hi655x_pmic *pmic;
 174         struct regulator_config config = { };
 175         struct regulator_dev *rdev;
 176
 177         pmic = dev_get_drvdata(pdev->dev.parent);
 178         if (!pmic) {
 179                 dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
 180                 return -ENODEV;
 181         }
 182
 183         regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
 184         if (!regulator)
 185                 return -ENOMEM;
 186
 187         platform_set_drvdata(pdev, regulator);
 188
 189         config.dev = pdev->dev.parent;
 190         config.regmap = pmic->regmap;
 191         config.driver_data = regulator;
 192         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 193                 rdev = devm_regulator_register(&pdev->dev,
 194                                                &regulators[i].rdesc,
 195                                                &config);
 196                 if (IS_ERR(rdev)) {
 197                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 198                                 regulator->rdesc.name);
 199                         return PTR_ERR(rdev);
 200                 }
 201         }
 202         return 0;
 203 }
 204
 205 static const struct platform_device_id hi655x_regulator_table[] = {
 206         { .name = "hi655x-regulator" },
 207         {},
 208 };
 209 MODULE_DEVICE_TABLE(platform, hi655x_regulator_table);
 210
 211 static struct platform_driver hi655x_regulator_driver = {
 212         .id_table = hi655x_regulator_table,
 213         .driver = {
 214                 .name   = "hi655x-regulator",
 215         },
 216         .probe  = hi655x_regulator_probe,
 217 };
 218 module_platform_driver(hi655x_regulator_driver);
 219
 220 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
 221 MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
 222 MODULE_LICENSE("GPL v2");