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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, _sr, _sm) \
 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                 .bypass_reg     = _sr,                          \
 54                 .bypass_mask    = _sm,                          \
 55         }                                                       \
 56 
 57 #define TPS65218_INFO(_id, _nm, _min, _max)     \
 58         [_id] = {                                       \
 59                 .id             = _id,                  \
 60                 .name           = _nm,                  \
 61                 .min_uV         = _min,                 \
 62                 .max_uV         = _max,                 \
 63         }
 64 
 65 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
 66         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
 67         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
 68 };
 69 
 70 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
 71         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
 72         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
 73 };
 74 
 75 static const struct regulator_linear_range dcdc4_ranges[] = {
 76         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
 77         REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
 78 };
 79 
 80 static struct tps_info tps65218_pmic_regs[] = {
 81         TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000),
 82         TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
 83         TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
 84         TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
 85         TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
 86         TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
 87         TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
 88         TPS65218_INFO(LS3, "LS3", -1, -1),
 89 };
 90 
 91 #define TPS65218_OF_MATCH(comp, label) \
 92         { \
 93                 .compatible = comp, \
 94                 .data = &label, \
 95         }
 96 
 97 static const struct of_device_id tps65218_of_match[] = {
 98         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
 99         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
100         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
101         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
102         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
103         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
104         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
105         TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]),
106         { }
107 };
108 MODULE_DEVICE_TABLE(of, tps65218_of_match);
109 
110 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
111                                          unsigned selector)
112 {
113         int ret;
114         struct tps65218 *tps = rdev_get_drvdata(dev);
115         unsigned int rid = rdev_get_id(dev);
116 
117         /* Set the voltage based on vsel value and write protect level is 2 */
118         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
119                                 selector, TPS65218_PROTECT_L1);
120 
121         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
122         switch (rid) {
123         case TPS65218_DCDC_1:
124         case TPS65218_DCDC_2:
125                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
126                                         TPS65218_SLEW_RATE_GO,
127                                         TPS65218_SLEW_RATE_GO,
128                                         TPS65218_PROTECT_L1);
129                 break;
130         }
131 
132         return ret;
133 }
134 
135 static int tps65218_pmic_enable(struct regulator_dev *dev)
136 {
137         struct tps65218 *tps = rdev_get_drvdata(dev);
138         int rid = rdev_get_id(dev);
139 
140         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
141                 return -EINVAL;
142 
143         /* Enable the regulator and password protection is level 1 */
144         return tps65218_set_bits(tps, dev->desc->enable_reg,
145                                  dev->desc->enable_mask, dev->desc->enable_mask,
146                                  TPS65218_PROTECT_L1);
147 }
148 
149 static int tps65218_pmic_disable(struct regulator_dev *dev)
150 {
151         struct tps65218 *tps = rdev_get_drvdata(dev);
152         int rid = rdev_get_id(dev);
153 
154         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
155                 return -EINVAL;
156 
157         /* Disable the regulator and password protection is level 1 */
158         return tps65218_clear_bits(tps, dev->desc->enable_reg,
159                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
160 }
161 
162 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev)
163 {
164         struct tps65218 *tps = rdev_get_drvdata(dev);
165         unsigned int rid = rdev_get_id(dev);
166 
167         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
168                 return -EINVAL;
169 
170         return tps65218_clear_bits(tps, dev->desc->bypass_reg,
171                                    dev->desc->bypass_mask,
172                                    TPS65218_PROTECT_L1);
173 }
174 
175 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)
176 {
177         struct tps65218 *tps = rdev_get_drvdata(dev);
178         unsigned int rid = rdev_get_id(dev);
179 
180         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
181                 return -EINVAL;
182 
183         if (!tps->info[rid]->strobe) {
184                 if (rid == TPS65218_DCDC_3)
185                         tps->info[rid]->strobe = 3;
186                 else
187                         return -EINVAL;
188         }
189 
190         return tps65218_set_bits(tps, dev->desc->bypass_reg,
191                                  dev->desc->bypass_mask,
192                                  tps->info[rid]->strobe,
193                                  TPS65218_PROTECT_L1);
194 }
195 
196 /* Operations permitted on DCDC1, DCDC2 */
197 static struct regulator_ops tps65218_dcdc12_ops = {
198         .is_enabled             = regulator_is_enabled_regmap,
199         .enable                 = tps65218_pmic_enable,
200         .disable                = tps65218_pmic_disable,
201         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
202         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
203         .list_voltage           = regulator_list_voltage_linear_range,
204         .map_voltage            = regulator_map_voltage_linear_range,
205         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
206         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
207         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
208 };
209 
210 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
211 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
212         .is_enabled             = regulator_is_enabled_regmap,
213         .enable                 = tps65218_pmic_enable,
214         .disable                = tps65218_pmic_disable,
215         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
216         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
217         .list_voltage           = regulator_list_voltage_linear_range,
218         .map_voltage            = regulator_map_voltage_linear_range,
219         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
220         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
221 };
222 
223 static const int ls3_currents[] = { 100, 200, 500, 1000 };
224 
225 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
226                                                int lim_uA)
227 {
228         unsigned int index = 0;
229         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
230         struct tps65218 *tps = rdev_get_drvdata(dev);
231 
232         while (index < num_currents && ls3_currents[index] != lim_uA)
233                 index++;
234 
235         if (index == num_currents)
236                 return -EINVAL;
237 
238         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
239                                  index << 2, TPS65218_PROTECT_L1);
240 }
241 
242 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
243                                            int min_uA, int max_uA)
244 {
245         int index = 0;
246         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
247         struct tps65218 *tps = rdev_get_drvdata(dev);
248 
249         while (index < num_currents && ls3_currents[index] < max_uA)
250                 index++;
251 
252         index--;
253 
254         if (index < 0 || ls3_currents[index] < min_uA)
255                 return -EINVAL;
256 
257         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
258                                  index << 2, TPS65218_PROTECT_L1);
259 }
260 
261 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
262 {
263         int retval;
264         unsigned int index;
265         struct tps65218 *tps = rdev_get_drvdata(dev);
266 
267         retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index);
268         if (retval < 0)
269                 return retval;
270 
271         index = (index & dev->desc->csel_mask) >> 2;
272 
273         return ls3_currents[index];
274 }
275 
276 static struct regulator_ops tps65218_ls3_ops = {
277         .is_enabled             = regulator_is_enabled_regmap,
278         .enable                 = tps65218_pmic_enable,
279         .disable                = tps65218_pmic_disable,
280         .set_input_current_limit = tps65218_pmic_set_input_current_lim,
281         .set_current_limit      = tps65218_pmic_set_current_limit,
282         .get_current_limit      = tps65218_pmic_get_current_limit,
283 };
284 
285 /* Operations permitted on DCDC5, DCDC6 */
286 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
287         .is_enabled             = regulator_is_enabled_regmap,
288         .enable                 = tps65218_pmic_enable,
289         .disable                = tps65218_pmic_disable,
290         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
291         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
292 };
293 
294 static const struct regulator_desc regulators[] = {
295         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE,
296                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1,
297                            TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
298                            TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
299                            2, 4000, 0, TPS65218_REG_SEQ3,
300                            TPS65218_SEQ3_DC1_SEQ_MASK),
301         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE,
302                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2,
303                            TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
304                            TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
305                            2, 4000, 0, TPS65218_REG_SEQ3,
306                            TPS65218_SEQ3_DC2_SEQ_MASK),
307         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE,
308                            tps65218_ldo1_dcdc34_ops, 64,
309                            TPS65218_REG_CONTROL_DCDC3,
310                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
311                            TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
312                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK),
313         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE,
314                            tps65218_ldo1_dcdc34_ops, 53,
315                            TPS65218_REG_CONTROL_DCDC4,
316                            TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
317                            TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
318                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK),
319         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE,
320                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
321                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0,
322                            NULL, 0, 0, 1000000, TPS65218_REG_SEQ5,
323                            TPS65218_SEQ5_DC5_SEQ_MASK),
324         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE,
325                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
326                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0,
327                            NULL, 0, 0, 1800000, TPS65218_REG_SEQ5,
328                            TPS65218_SEQ5_DC6_SEQ_MASK),
329         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE,
330                            tps65218_ldo1_dcdc34_ops, 64,
331                            TPS65218_REG_CONTROL_LDO1,
332                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
333                            TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
334                            2, 0, 0, TPS65218_REG_SEQ6,
335                            TPS65218_SEQ6_LDO1_SEQ_MASK),
336         TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT,
337                            tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2,
338                            TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2,
339                            TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0, 0, 0),
340 };
341 
342 static int tps65218_regulator_probe(struct platform_device *pdev)
343 {
344         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
345         struct regulator_init_data *init_data;
346         const struct tps_info   *template;
347         struct regulator_dev *rdev;
348         const struct of_device_id       *match;
349         struct regulator_config config = { };
350         int id, ret;
351         unsigned int val;
352 
353         match = of_match_device(tps65218_of_match, &pdev->dev);
354         if (!match)
355                 return -ENODEV;
356 
357         template = match->data;
358         id = template->id;
359         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
360                                                &regulators[id]);
361 
362         platform_set_drvdata(pdev, tps);
363 
364         tps->info[id] = &tps65218_pmic_regs[id];
365         config.dev = &pdev->dev;
366         config.init_data = init_data;
367         config.driver_data = tps;
368         config.regmap = tps->regmap;
369         config.of_node = pdev->dev.of_node;
370 
371         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
372         if (IS_ERR(rdev)) {
373                 dev_err(tps->dev, "failed to register %s regulator\n",
374                         pdev->name);
375                 return PTR_ERR(rdev);
376         }
377 
378         ret = tps65218_reg_read(tps, regulators[id].bypass_reg, &val);
379         if (ret)
380                 return ret;
381 
382         tps->info[id]->strobe = val & regulators[id].bypass_mask;
383 
384         return 0;
385 }
386 
387 static struct platform_driver tps65218_regulator_driver = {
388         .driver = {
389                 .name = "tps65218-pmic",
390                 .of_match_table = tps65218_of_match,
391         },
392         .probe = tps65218_regulator_probe,
393 };
394 
395 module_platform_driver(tps65218_regulator_driver);
396 
397 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
398 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
399 MODULE_ALIAS("platform:tps65218-pmic");
400 MODULE_LICENSE("GPL v2");
401 

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