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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 static unsigned int tps65218_ramp_delay = 4000;
 31 
 32 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 };
 33 
 34 #define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t, \
 35                             _lr, _nlr)                          \
 36         {                                                       \
 37                 .name                   = _name,                \
 38                 .id                     = _id,                  \
 39                 .ops                    = &_ops,                \
 40                 .n_voltages             = _n,                   \
 41                 .type                   = REGULATOR_VOLTAGE,    \
 42                 .owner                  = THIS_MODULE,          \
 43                 .vsel_reg               = _vr,                  \
 44                 .vsel_mask              = _vm,                  \
 45                 .enable_reg             = _er,                  \
 46                 .enable_mask            = _em,                  \
 47                 .volt_table             = _t,                   \
 48                 .linear_ranges          = _lr,                  \
 49                 .n_linear_ranges        = _nlr,                 \
 50         }                                                       \
 51 
 52 #define TPS65218_INFO(_id, _nm, _min, _max)     \
 53         {                                               \
 54                 .id             = _id,                  \
 55                 .name           = _nm,                  \
 56                 .min_uV         = _min,                 \
 57                 .max_uV         = _max,                 \
 58         }
 59 
 60 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
 61         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
 62         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
 63 };
 64 
 65 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
 66         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
 67         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
 68 };
 69 
 70 static const struct regulator_linear_range dcdc4_ranges[] = {
 71         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
 72         REGULATOR_LINEAR_RANGE(1550000, 0x10, 0x34, 50000),
 73 };
 74 
 75 static struct tps_info tps65218_pmic_regs[] = {
 76         TPS65218_INFO(0, "DCDC1", 850000, 167500),
 77         TPS65218_INFO(1, "DCDC2", 850000, 1675000),
 78         TPS65218_INFO(2, "DCDC3", 900000, 3400000),
 79         TPS65218_INFO(3, "DCDC4", 1175000, 3400000),
 80         TPS65218_INFO(4, "DCDC5", 1000000, 1000000),
 81         TPS65218_INFO(5, "DCDC6", 1800000, 1800000),
 82         TPS65218_INFO(6, "LDO1", 900000, 3400000),
 83 };
 84 
 85 #define TPS65218_OF_MATCH(comp, label) \
 86         { \
 87                 .compatible = comp, \
 88                 .data = &label, \
 89         }
 90 
 91 static const struct of_device_id tps65218_of_match[] = {
 92         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
 93         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
 94         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
 95         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
 96         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
 97         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
 98         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
 99         { }
100 };
101 MODULE_DEVICE_TABLE(of, tps65218_of_match);
102 
103 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
104                                          unsigned selector)
105 {
106         int ret;
107         struct tps65218 *tps = rdev_get_drvdata(dev);
108         unsigned int rid = rdev_get_id(dev);
109 
110         /* Set the voltage based on vsel value and write protect level is 2 */
111         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
112                                 selector, TPS65218_PROTECT_L1);
113 
114         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
115         switch (rid) {
116         case TPS65218_DCDC_1:
117         case TPS65218_DCDC_2:
118                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
119                                         TPS65218_SLEW_RATE_GO,
120                                         TPS65218_SLEW_RATE_GO,
121                                         TPS65218_PROTECT_L1);
122                 break;
123         }
124 
125         return ret;
126 }
127 
128 static int tps65218_pmic_enable(struct regulator_dev *dev)
129 {
130         struct tps65218 *tps = rdev_get_drvdata(dev);
131         unsigned int rid = rdev_get_id(dev);
132 
133         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
134                 return -EINVAL;
135 
136         /* Enable the regulator and password protection is level 1 */
137         return tps65218_set_bits(tps, dev->desc->enable_reg,
138                                  dev->desc->enable_mask, dev->desc->enable_mask,
139                                  TPS65218_PROTECT_L1);
140 }
141 
142 static int tps65218_pmic_disable(struct regulator_dev *dev)
143 {
144         struct tps65218 *tps = rdev_get_drvdata(dev);
145         unsigned int rid = rdev_get_id(dev);
146 
147         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
148                 return -EINVAL;
149 
150         /* Disable the regulator and password protection is level 1 */
151         return tps65218_clear_bits(tps, dev->desc->enable_reg,
152                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
153 }
154 
155 static int tps65218_set_voltage_time_sel(struct regulator_dev *rdev,
156         unsigned int old_selector, unsigned int new_selector)
157 {
158         int old_uv, new_uv;
159 
160         old_uv = regulator_list_voltage_linear_range(rdev, old_selector);
161         if (old_uv < 0)
162                 return old_uv;
163 
164         new_uv = regulator_list_voltage_linear_range(rdev, new_selector);
165         if (new_uv < 0)
166                 return new_uv;
167 
168         return DIV_ROUND_UP(abs(old_uv - new_uv), tps65218_ramp_delay);
169 }
170 
171 /* Operations permitted on DCDC1, DCDC2 */
172 static struct regulator_ops tps65218_dcdc12_ops = {
173         .is_enabled             = regulator_is_enabled_regmap,
174         .enable                 = tps65218_pmic_enable,
175         .disable                = tps65218_pmic_disable,
176         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
177         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
178         .list_voltage           = regulator_list_voltage_linear_range,
179         .map_voltage            = regulator_map_voltage_linear_range,
180         .set_voltage_time_sel   = tps65218_set_voltage_time_sel,
181 };
182 
183 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
184 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
185         .is_enabled             = regulator_is_enabled_regmap,
186         .enable                 = tps65218_pmic_enable,
187         .disable                = tps65218_pmic_disable,
188         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
189         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
190         .list_voltage           = regulator_list_voltage_linear_range,
191         .map_voltage            = regulator_map_voltage_linear_range,
192 };
193 
194 /* Operations permitted on DCDC5, DCDC6 */
195 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
196         .is_enabled             = regulator_is_enabled_regmap,
197         .enable                 = tps65218_pmic_enable,
198         .disable                = tps65218_pmic_disable,
199 };
200 
201 static const struct regulator_desc regulators[] = {
202         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
203                            TPS65218_REG_CONTROL_DCDC1,
204                            TPS65218_CONTROL_DCDC1_MASK,
205                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL,
206                            dcdc1_dcdc2_ranges, 2),
207         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
208                            TPS65218_REG_CONTROL_DCDC2,
209                            TPS65218_CONTROL_DCDC2_MASK,
210                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL,
211                            dcdc1_dcdc2_ranges, 2),
212         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
213                            64, TPS65218_REG_CONTROL_DCDC3,
214                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
215                            TPS65218_ENABLE1_DC3_EN, NULL,
216                            ldo1_dcdc3_ranges, 2),
217         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
218                            53, TPS65218_REG_CONTROL_DCDC4,
219                            TPS65218_CONTROL_DCDC4_MASK,
220                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL,
221                            dcdc4_ranges, 2),
222         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
223                            1, -1, -1, TPS65218_REG_ENABLE1,
224                            TPS65218_ENABLE1_DC5_EN, NULL, NULL, 0),
225         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
226                            1, -1, -1, TPS65218_REG_ENABLE1,
227                            TPS65218_ENABLE1_DC6_EN, NULL, NULL, 0),
228         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
229                            TPS65218_REG_CONTROL_DCDC4,
230                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
231                            TPS65218_ENABLE2_LDO1_EN, NULL, ldo1_dcdc3_ranges,
232                            2),
233 };
234 
235 static int tps65218_regulator_probe(struct platform_device *pdev)
236 {
237         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
238         struct regulator_init_data *init_data;
239         const struct tps_info   *template;
240         struct regulator_dev *rdev;
241         const struct of_device_id       *match;
242         struct regulator_config config = { };
243         int id;
244 
245         match = of_match_device(tps65218_of_match, &pdev->dev);
246         if (!match)
247                 return -ENODEV;
248 
249         template = match->data;
250         id = template->id;
251         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node);
252 
253         platform_set_drvdata(pdev, tps);
254 
255         tps->info[id] = &tps65218_pmic_regs[id];
256         config.dev = &pdev->dev;
257         config.init_data = init_data;
258         config.driver_data = tps;
259         config.regmap = tps->regmap;
260 
261         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
262         if (IS_ERR(rdev)) {
263                 dev_err(tps->dev, "failed to register %s regulator\n",
264                         pdev->name);
265                 return PTR_ERR(rdev);
266         }
267 
268         return 0;
269 }
270 
271 static struct platform_driver tps65218_regulator_driver = {
272         .driver = {
273                 .name = "tps65218-pmic",
274                 .owner = THIS_MODULE,
275                 .of_match_table = tps65218_of_match,
276         },
277         .probe = tps65218_regulator_probe,
278 };
279 
280 module_platform_driver(tps65218_regulator_driver);
281 
282 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
283 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
284 MODULE_ALIAS("platform:tps65218-pmic");
285 MODULE_LICENSE("GPL v2");
286 

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