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Linux/drivers/regulator/tps65217-regulator.c

  1 /*
  2  * tps65217-regulator.c
  3  *
  4  * Regulator driver for TPS65217 PMIC
  5  *
  6  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
  7  *
  8  * This program is free software; you can redistribute it and/or
  9  * modify it under the terms of the GNU General Public License as
 10  * published by the Free Software Foundation version 2.
 11  *
 12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 13  * kind, whether express or implied; without even the implied warranty
 14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  */
 17 
 18 #include <linux/kernel.h>
 19 #include <linux/module.h>
 20 #include <linux/device.h>
 21 #include <linux/init.h>
 22 #include <linux/err.h>
 23 #include <linux/platform_device.h>
 24 
 25 #include <linux/regulator/of_regulator.h>
 26 #include <linux/regulator/driver.h>
 27 #include <linux/regulator/machine.h>
 28 #include <linux/mfd/tps65217.h>
 29 
 30 #define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
 31                            _t, _lr, _nlr) \
 32         {                                               \
 33                 .name           = _name,                \
 34                 .id             = _id,                  \
 35                 .of_match       = of_match_ptr(_of_match),    \
 36                 .regulators_node= of_match_ptr("regulators"), \
 37                 .ops            = &_ops,                \
 38                 .n_voltages     = _n,                   \
 39                 .type           = REGULATOR_VOLTAGE,    \
 40                 .owner          = THIS_MODULE,          \
 41                 .vsel_reg       = _vr,                  \
 42                 .vsel_mask      = _vm,                  \
 43                 .enable_reg     = TPS65217_REG_ENABLE,  \
 44                 .enable_mask    = _em,                  \
 45                 .volt_table     = _t,                   \
 46                 .linear_ranges  = _lr,                  \
 47                 .n_linear_ranges = _nlr,                \
 48         }                                               \
 49 
 50 static const unsigned int LDO1_VSEL_table[] = {
 51         1000000, 1100000, 1200000, 1250000,
 52         1300000, 1350000, 1400000, 1500000,
 53         1600000, 1800000, 2500000, 2750000,
 54         2800000, 3000000, 3100000, 3300000,
 55 };
 56 
 57 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
 58         REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
 59         REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
 60         REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
 61         REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
 62         REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
 63 };
 64 
 65 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
 66         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
 67         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
 68         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
 69 };
 70 
 71 static int tps65217_pmic_enable(struct regulator_dev *dev)
 72 {
 73         struct tps65217 *tps = rdev_get_drvdata(dev);
 74         int rid = rdev_get_id(dev);
 75 
 76         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 77                 return -EINVAL;
 78 
 79         /* Enable the regulator and password protection is level 1 */
 80         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
 81                                  dev->desc->enable_mask, dev->desc->enable_mask,
 82                                  TPS65217_PROTECT_L1);
 83 }
 84 
 85 static int tps65217_pmic_disable(struct regulator_dev *dev)
 86 {
 87         struct tps65217 *tps = rdev_get_drvdata(dev);
 88         int rid = rdev_get_id(dev);
 89 
 90         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 91                 return -EINVAL;
 92 
 93         /* Disable the regulator and password protection is level 1 */
 94         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
 95                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
 96 }
 97 
 98 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 99                                          unsigned selector)
100 {
101         int ret;
102         struct tps65217 *tps = rdev_get_drvdata(dev);
103         unsigned int rid = rdev_get_id(dev);
104 
105         /* Set the voltage based on vsel value and write protect level is 2 */
106         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
107                                 selector, TPS65217_PROTECT_L2);
108 
109         /* Set GO bit for DCDCx to initiate voltage transistion */
110         switch (rid) {
111         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
112                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
113                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
114                                        TPS65217_PROTECT_L2);
115                 break;
116         }
117 
118         return ret;
119 }
120 
121 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
122 static struct regulator_ops tps65217_pmic_ops = {
123         .is_enabled             = regulator_is_enabled_regmap,
124         .enable                 = tps65217_pmic_enable,
125         .disable                = tps65217_pmic_disable,
126         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
127         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
128         .list_voltage           = regulator_list_voltage_linear_range,
129         .map_voltage            = regulator_map_voltage_linear_range,
130 };
131 
132 /* Operations permitted on LDO1 */
133 static struct regulator_ops tps65217_pmic_ldo1_ops = {
134         .is_enabled             = regulator_is_enabled_regmap,
135         .enable                 = tps65217_pmic_enable,
136         .disable                = tps65217_pmic_disable,
137         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
138         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
139         .list_voltage           = regulator_list_voltage_table,
140         .map_voltage            = regulator_map_voltage_ascend,
141 };
142 
143 static const struct regulator_desc regulators[] = {
144         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
145                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
146                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
147                            NULL, tps65217_uv1_ranges, 2),
148         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
149                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
150                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
151                            NULL, tps65217_uv1_ranges,
152                            ARRAY_SIZE(tps65217_uv1_ranges)),
153         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
154                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
155                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
156                            NULL, tps65217_uv1_ranges, 1),
157         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
158                            tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
159                            TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
160                            LDO1_VSEL_table, NULL, 0),
161         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
162                            64, TPS65217_REG_DEFLDO2,
163                            TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
164                            NULL, tps65217_uv1_ranges,
165                            ARRAY_SIZE(tps65217_uv1_ranges)),
166         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
167                            32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
168                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
169                            NULL, tps65217_uv2_ranges,
170                            ARRAY_SIZE(tps65217_uv2_ranges)),
171         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
172                            32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
173                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
174                            NULL, tps65217_uv2_ranges,
175                            ARRAY_SIZE(tps65217_uv2_ranges)),
176 };
177 
178 static int tps65217_regulator_probe(struct platform_device *pdev)
179 {
180         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
181         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
182         struct regulator_dev *rdev;
183         struct regulator_config config = { };
184         int i;
185 
186         if (tps65217_chip_id(tps) != TPS65217) {
187                 dev_err(&pdev->dev, "Invalid tps chip version\n");
188                 return -ENODEV;
189         }
190 
191         platform_set_drvdata(pdev, tps);
192 
193         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
194                 /* Register the regulators */
195                 config.dev = tps->dev;
196                 if (pdata)
197                         config.init_data = pdata->tps65217_init_data[i];
198                 config.driver_data = tps;
199                 config.regmap = tps->regmap;
200 
201                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
202                                                &config);
203                 if (IS_ERR(rdev)) {
204                         dev_err(tps->dev, "failed to register %s regulator\n",
205                                 pdev->name);
206                         return PTR_ERR(rdev);
207                 }
208         }
209 
210         return 0;
211 }
212 
213 static struct platform_driver tps65217_regulator_driver = {
214         .driver = {
215                 .name = "tps65217-pmic",
216         },
217         .probe = tps65217_regulator_probe,
218 };
219 
220 static int __init tps65217_regulator_init(void)
221 {
222         return platform_driver_register(&tps65217_regulator_driver);
223 }
224 subsys_initcall(tps65217_regulator_init);
225 
226 static void __exit tps65217_regulator_exit(void)
227 {
228         platform_driver_unregister(&tps65217_regulator_driver);
229 }
230 module_exit(tps65217_regulator_exit);
231 
232 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
233 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
234 MODULE_ALIAS("platform:tps65217-pmic");
235 MODULE_LICENSE("GPL v2");
236 

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