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Linux/drivers/regulator/tps65218-regulator.c

  1 /*
  2  * tps65218-regulator.c
  3  *
  4  * Regulator driver for TPS65218 PMIC
  5  *
  6  * Copyright (C) 2014 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 version 2 as
 10  * published by the Free Software Foundation.
 11  *
 12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 13  * kind, whether expressed or implied; without even the implied warranty
 14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License version 2 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 #include <linux/of_device.h>
 25 #include <linux/regulator/of_regulator.h>
 26 #include <linux/regulator/driver.h>
 27 #include <linux/regulator/machine.h>
 28 #include <linux/mfd/tps65218.h>
 29 
 30 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 };
 31 
 32 #define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t, \
 33                             _lr, _nlr, _delay)                  \
 34         {                                                       \
 35                 .name                   = _name,                \
 36                 .id                     = _id,                  \
 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             = _er,                  \
 44                 .enable_mask            = _em,                  \
 45                 .volt_table             = _t,                   \
 46                 .linear_ranges          = _lr,                  \
 47                 .n_linear_ranges        = _nlr,                 \
 48                 .ramp_delay             = _delay,               \
 49         }                                                       \
 50 
 51 #define TPS65218_INFO(_id, _nm, _min, _max)     \
 52         {                                               \
 53                 .id             = _id,                  \
 54                 .name           = _nm,                  \
 55                 .min_uV         = _min,                 \
 56                 .max_uV         = _max,                 \
 57         }
 58 
 59 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
 60         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
 61         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
 62 };
 63 
 64 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
 65         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
 66         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
 67 };
 68 
 69 static const struct regulator_linear_range dcdc4_ranges[] = {
 70         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
 71         REGULATOR_LINEAR_RANGE(1550000, 0x10, 0x34, 50000),
 72 };
 73 
 74 static struct tps_info tps65218_pmic_regs[] = {
 75         TPS65218_INFO(0, "DCDC1", 850000, 167500),
 76         TPS65218_INFO(1, "DCDC2", 850000, 1675000),
 77         TPS65218_INFO(2, "DCDC3", 900000, 3400000),
 78         TPS65218_INFO(3, "DCDC4", 1175000, 3400000),
 79         TPS65218_INFO(4, "DCDC5", 1000000, 1000000),
 80         TPS65218_INFO(5, "DCDC6", 1800000, 1800000),
 81         TPS65218_INFO(6, "LDO1", 900000, 3400000),
 82 };
 83 
 84 #define TPS65218_OF_MATCH(comp, label) \
 85         { \
 86                 .compatible = comp, \
 87                 .data = &label, \
 88         }
 89 
 90 static const struct of_device_id tps65218_of_match[] = {
 91         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
 92         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
 93         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
 94         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
 95         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
 96         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
 97         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
 98         { }
 99 };
100 MODULE_DEVICE_TABLE(of, tps65218_of_match);
101 
102 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
103                                          unsigned selector)
104 {
105         int ret;
106         struct tps65218 *tps = rdev_get_drvdata(dev);
107         unsigned int rid = rdev_get_id(dev);
108 
109         /* Set the voltage based on vsel value and write protect level is 2 */
110         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
111                                 selector, TPS65218_PROTECT_L1);
112 
113         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
114         switch (rid) {
115         case TPS65218_DCDC_1:
116         case TPS65218_DCDC_2:
117                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
118                                         TPS65218_SLEW_RATE_GO,
119                                         TPS65218_SLEW_RATE_GO,
120                                         TPS65218_PROTECT_L1);
121                 break;
122         }
123 
124         return ret;
125 }
126 
127 static int tps65218_pmic_enable(struct regulator_dev *dev)
128 {
129         struct tps65218 *tps = rdev_get_drvdata(dev);
130         unsigned int rid = rdev_get_id(dev);
131 
132         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
133                 return -EINVAL;
134 
135         /* Enable the regulator and password protection is level 1 */
136         return tps65218_set_bits(tps, dev->desc->enable_reg,
137                                  dev->desc->enable_mask, dev->desc->enable_mask,
138                                  TPS65218_PROTECT_L1);
139 }
140 
141 static int tps65218_pmic_disable(struct regulator_dev *dev)
142 {
143         struct tps65218 *tps = rdev_get_drvdata(dev);
144         unsigned int rid = rdev_get_id(dev);
145 
146         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
147                 return -EINVAL;
148 
149         /* Disable the regulator and password protection is level 1 */
150         return tps65218_clear_bits(tps, dev->desc->enable_reg,
151                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
152 }
153 
154 /* Operations permitted on DCDC1, DCDC2 */
155 static struct regulator_ops tps65218_dcdc12_ops = {
156         .is_enabled             = regulator_is_enabled_regmap,
157         .enable                 = tps65218_pmic_enable,
158         .disable                = tps65218_pmic_disable,
159         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
160         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
161         .list_voltage           = regulator_list_voltage_linear_range,
162         .map_voltage            = regulator_map_voltage_linear_range,
163         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
164 };
165 
166 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
167 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
168         .is_enabled             = regulator_is_enabled_regmap,
169         .enable                 = tps65218_pmic_enable,
170         .disable                = tps65218_pmic_disable,
171         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
172         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
173         .list_voltage           = regulator_list_voltage_linear_range,
174         .map_voltage            = regulator_map_voltage_linear_range,
175 };
176 
177 /* Operations permitted on DCDC5, DCDC6 */
178 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
179         .is_enabled             = regulator_is_enabled_regmap,
180         .enable                 = tps65218_pmic_enable,
181         .disable                = tps65218_pmic_disable,
182 };
183 
184 static const struct regulator_desc regulators[] = {
185         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
186                            TPS65218_REG_CONTROL_DCDC1,
187                            TPS65218_CONTROL_DCDC1_MASK,
188                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL,
189                            dcdc1_dcdc2_ranges, 2, 4000),
190         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
191                            TPS65218_REG_CONTROL_DCDC2,
192                            TPS65218_CONTROL_DCDC2_MASK,
193                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL,
194                            dcdc1_dcdc2_ranges, 2, 4000),
195         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
196                            64, TPS65218_REG_CONTROL_DCDC3,
197                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
198                            TPS65218_ENABLE1_DC3_EN, NULL,
199                            ldo1_dcdc3_ranges, 2, 0),
200         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
201                            53, TPS65218_REG_CONTROL_DCDC4,
202                            TPS65218_CONTROL_DCDC4_MASK,
203                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL,
204                            dcdc4_ranges, 2, 0),
205         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
206                            1, -1, -1, TPS65218_REG_ENABLE1,
207                            TPS65218_ENABLE1_DC5_EN, NULL, NULL, 0, 0),
208         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
209                            1, -1, -1, TPS65218_REG_ENABLE1,
210                            TPS65218_ENABLE1_DC6_EN, NULL, NULL, 0, 0),
211         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
212                            TPS65218_REG_CONTROL_LDO1,
213                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
214                            TPS65218_ENABLE2_LDO1_EN, NULL, ldo1_dcdc3_ranges,
215                            2, 0),
216 };
217 
218 static int tps65218_regulator_probe(struct platform_device *pdev)
219 {
220         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
221         struct regulator_init_data *init_data;
222         const struct tps_info   *template;
223         struct regulator_dev *rdev;
224         const struct of_device_id       *match;
225         struct regulator_config config = { };
226         int id;
227 
228         match = of_match_device(tps65218_of_match, &pdev->dev);
229         if (!match)
230                 return -ENODEV;
231 
232         template = match->data;
233         id = template->id;
234         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node);
235 
236         platform_set_drvdata(pdev, tps);
237 
238         tps->info[id] = &tps65218_pmic_regs[id];
239         config.dev = &pdev->dev;
240         config.init_data = init_data;
241         config.driver_data = tps;
242         config.regmap = tps->regmap;
243         config.of_node = pdev->dev.of_node;
244 
245         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
246         if (IS_ERR(rdev)) {
247                 dev_err(tps->dev, "failed to register %s regulator\n",
248                         pdev->name);
249                 return PTR_ERR(rdev);
250         }
251 
252         return 0;
253 }
254 
255 static struct platform_driver tps65218_regulator_driver = {
256         .driver = {
257                 .name = "tps65218-pmic",
258                 .owner = THIS_MODULE,
259                 .of_match_table = tps65218_of_match,
260         },
261         .probe = tps65218_regulator_probe,
262 };
263 
264 module_platform_driver(tps65218_regulator_driver);
265 
266 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
267 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
268 MODULE_ALIAS("platform:tps65218-pmic");
269 MODULE_LICENSE("GPL v2");
270 

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