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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,
 31                            DCDC5, DCDC6, LDO1, LS3 };
 32 
 33 #define TPS65218_REGULATOR(_name, _id, _type, _ops, _n, _vr, _vm, _er, _em, \
 34                             _cr, _cm, _lr, _nlr, _delay, _fuv)          \
 35         {                                                       \
 36                 .name                   = _name,                \
 37                 .id                     = _id,                  \
 38                 .ops                    = &_ops,                \
 39                 .n_voltages             = _n,                   \
 40                 .type                   = _type,        \
 41                 .owner                  = THIS_MODULE,          \
 42                 .vsel_reg               = _vr,                  \
 43                 .vsel_mask              = _vm,                  \
 44                 .csel_reg               = _cr,                  \
 45                 .csel_mask              = _cm,                  \
 46                 .enable_reg             = _er,                  \
 47                 .enable_mask            = _em,                  \
 48                 .volt_table             = NULL,                 \
 49                 .linear_ranges          = _lr,                  \
 50                 .n_linear_ranges        = _nlr,                 \
 51                 .ramp_delay             = _delay,               \
 52                 .fixed_uV               = _fuv                  \
 53         }                                                       \
 54 
 55 #define TPS65218_INFO(_id, _nm, _min, _max)     \
 56         [_id] = {                                       \
 57                 .id             = _id,                  \
 58                 .name           = _nm,                  \
 59                 .min_uV         = _min,                 \
 60                 .max_uV         = _max,                 \
 61         }
 62 
 63 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
 64         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
 65         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
 66 };
 67 
 68 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
 69         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
 70         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
 71 };
 72 
 73 static const struct regulator_linear_range dcdc4_ranges[] = {
 74         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
 75         REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
 76 };
 77 
 78 static struct tps_info tps65218_pmic_regs[] = {
 79         TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000),
 80         TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
 81         TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
 82         TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
 83         TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
 84         TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
 85         TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
 86         TPS65218_INFO(LS3, "LS3", -1, -1),
 87 };
 88 
 89 #define TPS65218_OF_MATCH(comp, label) \
 90         { \
 91                 .compatible = comp, \
 92                 .data = &label, \
 93         }
 94 
 95 static const struct of_device_id tps65218_of_match[] = {
 96         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
 97         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
 98         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
 99         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
100         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
101         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
102         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
103         TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]),
104         { }
105 };
106 MODULE_DEVICE_TABLE(of, tps65218_of_match);
107 
108 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
109                                          unsigned selector)
110 {
111         int ret;
112         struct tps65218 *tps = rdev_get_drvdata(dev);
113         unsigned int rid = rdev_get_id(dev);
114 
115         /* Set the voltage based on vsel value and write protect level is 2 */
116         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
117                                 selector, TPS65218_PROTECT_L1);
118 
119         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
120         switch (rid) {
121         case TPS65218_DCDC_1:
122         case TPS65218_DCDC_2:
123                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
124                                         TPS65218_SLEW_RATE_GO,
125                                         TPS65218_SLEW_RATE_GO,
126                                         TPS65218_PROTECT_L1);
127                 break;
128         }
129 
130         return ret;
131 }
132 
133 static int tps65218_pmic_enable(struct regulator_dev *dev)
134 {
135         struct tps65218 *tps = rdev_get_drvdata(dev);
136         int rid = rdev_get_id(dev);
137 
138         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
139                 return -EINVAL;
140 
141         /* Enable the regulator and password protection is level 1 */
142         return tps65218_set_bits(tps, dev->desc->enable_reg,
143                                  dev->desc->enable_mask, dev->desc->enable_mask,
144                                  TPS65218_PROTECT_L1);
145 }
146 
147 static int tps65218_pmic_disable(struct regulator_dev *dev)
148 {
149         struct tps65218 *tps = rdev_get_drvdata(dev);
150         int rid = rdev_get_id(dev);
151 
152         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
153                 return -EINVAL;
154 
155         /* Disable the regulator and password protection is level 1 */
156         return tps65218_clear_bits(tps, dev->desc->enable_reg,
157                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
158 }
159 
160 /* Operations permitted on DCDC1, DCDC2 */
161 static struct regulator_ops tps65218_dcdc12_ops = {
162         .is_enabled             = regulator_is_enabled_regmap,
163         .enable                 = tps65218_pmic_enable,
164         .disable                = tps65218_pmic_disable,
165         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
166         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
167         .list_voltage           = regulator_list_voltage_linear_range,
168         .map_voltage            = regulator_map_voltage_linear_range,
169         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
170 };
171 
172 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
173 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
174         .is_enabled             = regulator_is_enabled_regmap,
175         .enable                 = tps65218_pmic_enable,
176         .disable                = tps65218_pmic_disable,
177         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
178         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
179         .list_voltage           = regulator_list_voltage_linear_range,
180         .map_voltage            = regulator_map_voltage_linear_range,
181 };
182 
183 static const int ls3_currents[] = { 100, 200, 500, 1000 };
184 
185 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
186                                                int lim_uA)
187 {
188         unsigned int index = 0;
189         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
190         struct tps65218 *tps = rdev_get_drvdata(dev);
191 
192         while (index < num_currents && ls3_currents[index] != lim_uA)
193                 index++;
194 
195         if (index == num_currents)
196                 return -EINVAL;
197 
198         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
199                                  index << 2, TPS65218_PROTECT_L1);
200 }
201 
202 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
203                                            int min_uA, int max_uA)
204 {
205         int index = 0;
206         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
207         struct tps65218 *tps = rdev_get_drvdata(dev);
208 
209         while (index < num_currents && ls3_currents[index] < max_uA)
210                 index++;
211 
212         index--;
213 
214         if (index < 0 || ls3_currents[index] < min_uA)
215                 return -EINVAL;
216 
217         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
218                                  index << 2, TPS65218_PROTECT_L1);
219 }
220 
221 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
222 {
223         int retval;
224         unsigned int index;
225         struct tps65218 *tps = rdev_get_drvdata(dev);
226 
227         retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index);
228         if (retval < 0)
229                 return retval;
230 
231         index = (index & dev->desc->csel_mask) >> 2;
232 
233         return ls3_currents[index];
234 }
235 
236 static struct regulator_ops tps65218_ls3_ops = {
237         .is_enabled             = regulator_is_enabled_regmap,
238         .enable                 = tps65218_pmic_enable,
239         .disable                = tps65218_pmic_disable,
240         .set_input_current_limit = tps65218_pmic_set_input_current_lim,
241         .set_current_limit      = tps65218_pmic_set_current_limit,
242         .get_current_limit      = tps65218_pmic_get_current_limit,
243 };
244 
245 /* Operations permitted on DCDC5, DCDC6 */
246 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
247         .is_enabled             = regulator_is_enabled_regmap,
248         .enable                 = tps65218_pmic_enable,
249         .disable                = tps65218_pmic_disable,
250 };
251 
252 static const struct regulator_desc regulators[] = {
253         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE,
254                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1,
255                            TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
256                            TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
257                            2, 4000, 0),
258         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE,
259                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2,
260                            TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
261                            TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
262                            2, 4000, 0),
263         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE,
264                            tps65218_ldo1_dcdc34_ops, 64,
265                            TPS65218_REG_CONTROL_DCDC3,
266                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
267                            TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
268                            0, 0),
269         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE,
270                            tps65218_ldo1_dcdc34_ops, 53,
271                            TPS65218_REG_CONTROL_DCDC4,
272                            TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
273                            TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
274                            0, 0),
275         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE,
276                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
277                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0,
278                            NULL, 0, 0, 1000000),
279         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE,
280                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
281                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0,
282                            NULL, 0, 0, 1800000),
283         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE,
284                            tps65218_ldo1_dcdc34_ops, 64,
285                            TPS65218_REG_CONTROL_LDO1,
286                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
287                            TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
288                            2, 0, 0),
289         TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT,
290                            tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2,
291                            TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2,
292                            TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0),
293 };
294 
295 static int tps65218_regulator_probe(struct platform_device *pdev)
296 {
297         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
298         struct regulator_init_data *init_data;
299         const struct tps_info   *template;
300         struct regulator_dev *rdev;
301         const struct of_device_id       *match;
302         struct regulator_config config = { };
303         int id;
304 
305         match = of_match_device(tps65218_of_match, &pdev->dev);
306         if (!match)
307                 return -ENODEV;
308 
309         template = match->data;
310         id = template->id;
311         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
312                                                &regulators[id]);
313 
314         platform_set_drvdata(pdev, tps);
315 
316         tps->info[id] = &tps65218_pmic_regs[id];
317         config.dev = &pdev->dev;
318         config.init_data = init_data;
319         config.driver_data = tps;
320         config.regmap = tps->regmap;
321         config.of_node = pdev->dev.of_node;
322 
323         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
324         if (IS_ERR(rdev)) {
325                 dev_err(tps->dev, "failed to register %s regulator\n",
326                         pdev->name);
327                 return PTR_ERR(rdev);
328         }
329 
330         return 0;
331 }
332 
333 static struct platform_driver tps65218_regulator_driver = {
334         .driver = {
335                 .name = "tps65218-pmic",
336                 .of_match_table = tps65218_of_match,
337         },
338         .probe = tps65218_regulator_probe,
339 };
340 
341 module_platform_driver(tps65218_regulator_driver);
342 
343 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
344 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
345 MODULE_ALIAS("platform:tps65218-pmic");
346 MODULE_LICENSE("GPL v2");
347 

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