Merge tag 'pwm/for-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry...
[linux-2.6-microblaze.git] / 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/regmap.h>
26 #include <linux/regulator/of_regulator.h>
27 #include <linux/regulator/driver.h>
28 #include <linux/regulator/machine.h>
29 #include <linux/mfd/tps65218.h>
30
31 #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
32                            _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm) \
33         {                                                       \
34                 .name                   = _name,                \
35                 .of_match               = _of,                  \
36                 .id                     = _id,                  \
37                 .ops                    = &_ops,                \
38                 .n_voltages             = _n,                   \
39                 .type                   = _type,        \
40                 .owner                  = THIS_MODULE,          \
41                 .vsel_reg               = _vr,                  \
42                 .vsel_mask              = _vm,                  \
43                 .csel_reg               = _cr,                  \
44                 .csel_mask              = _cm,                  \
45                 .enable_reg             = _er,                  \
46                 .enable_mask            = _em,                  \
47                 .volt_table             = NULL,                 \
48                 .linear_ranges          = _lr,                  \
49                 .n_linear_ranges        = _nlr,                 \
50                 .ramp_delay             = _delay,               \
51                 .fixed_uV               = _fuv,                 \
52                 .bypass_reg     = _sr,                          \
53                 .bypass_mask    = _sm,                          \
54         }                                                       \
55
56 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
57         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
58         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
59 };
60
61 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
62         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
63         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
64 };
65
66 static const struct regulator_linear_range dcdc4_ranges[] = {
67         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
68         REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
69 };
70
71 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
72                                          unsigned selector)
73 {
74         int ret;
75         struct tps65218 *tps = rdev_get_drvdata(dev);
76         unsigned int rid = rdev_get_id(dev);
77
78         /* Set the voltage based on vsel value and write protect level is 2 */
79         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
80                                 selector, TPS65218_PROTECT_L1);
81
82         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
83         switch (rid) {
84         case TPS65218_DCDC_1:
85         case TPS65218_DCDC_2:
86                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
87                                         TPS65218_SLEW_RATE_GO,
88                                         TPS65218_SLEW_RATE_GO,
89                                         TPS65218_PROTECT_L1);
90                 break;
91         }
92
93         return ret;
94 }
95
96 static int tps65218_pmic_enable(struct regulator_dev *dev)
97 {
98         struct tps65218 *tps = rdev_get_drvdata(dev);
99         int rid = rdev_get_id(dev);
100
101         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
102                 return -EINVAL;
103
104         /* Enable the regulator and password protection is level 1 */
105         return tps65218_set_bits(tps, dev->desc->enable_reg,
106                                  dev->desc->enable_mask, dev->desc->enable_mask,
107                                  TPS65218_PROTECT_L1);
108 }
109
110 static int tps65218_pmic_disable(struct regulator_dev *dev)
111 {
112         struct tps65218 *tps = rdev_get_drvdata(dev);
113         int rid = rdev_get_id(dev);
114
115         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
116                 return -EINVAL;
117
118         /* Disable the regulator and password protection is level 1 */
119         return tps65218_clear_bits(tps, dev->desc->enable_reg,
120                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
121 }
122
123 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev)
124 {
125         struct tps65218 *tps = rdev_get_drvdata(dev);
126         unsigned int rid = rdev_get_id(dev);
127
128         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
129                 return -EINVAL;
130
131         return tps65218_clear_bits(tps, dev->desc->bypass_reg,
132                                    dev->desc->bypass_mask,
133                                    TPS65218_PROTECT_L1);
134 }
135
136 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)
137 {
138         struct tps65218 *tps = rdev_get_drvdata(dev);
139         unsigned int rid = rdev_get_id(dev);
140
141         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
142                 return -EINVAL;
143
144         /*
145          * Certain revisions of TPS65218 will need to have DCDC3 regulator
146          * enabled always, otherwise an immediate system reboot will occur
147          * during poweroff.
148          */
149         if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1)
150                 return 0;
151
152         if (!tps->strobes[rid]) {
153                 if (rid == TPS65218_DCDC_3)
154                         tps->strobes[rid] = 3;
155                 else
156                         return -EINVAL;
157         }
158
159         return tps65218_set_bits(tps, dev->desc->bypass_reg,
160                                  dev->desc->bypass_mask,
161                                  tps->strobes[rid], TPS65218_PROTECT_L1);
162 }
163
164 /* Operations permitted on DCDC1, DCDC2 */
165 static struct regulator_ops tps65218_dcdc12_ops = {
166         .is_enabled             = regulator_is_enabled_regmap,
167         .enable                 = tps65218_pmic_enable,
168         .disable                = tps65218_pmic_disable,
169         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
170         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
171         .list_voltage           = regulator_list_voltage_linear_range,
172         .map_voltage            = regulator_map_voltage_linear_range,
173         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
174         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
175         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
176 };
177
178 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
179 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
180         .is_enabled             = regulator_is_enabled_regmap,
181         .enable                 = tps65218_pmic_enable,
182         .disable                = tps65218_pmic_disable,
183         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
184         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
185         .list_voltage           = regulator_list_voltage_linear_range,
186         .map_voltage            = regulator_map_voltage_linear_range,
187         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
188         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
189 };
190
191 static const int ls3_currents[] = { 100, 200, 500, 1000 };
192
193 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
194                                                int lim_uA)
195 {
196         unsigned int index = 0;
197         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
198         struct tps65218 *tps = rdev_get_drvdata(dev);
199
200         while (index < num_currents && ls3_currents[index] != lim_uA)
201                 index++;
202
203         if (index == num_currents)
204                 return -EINVAL;
205
206         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
207                                  index << 2, TPS65218_PROTECT_L1);
208 }
209
210 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
211                                            int min_uA, int max_uA)
212 {
213         int index = 0;
214         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
215         struct tps65218 *tps = rdev_get_drvdata(dev);
216
217         while (index < num_currents && ls3_currents[index] < max_uA)
218                 index++;
219
220         index--;
221
222         if (index < 0 || ls3_currents[index] < min_uA)
223                 return -EINVAL;
224
225         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
226                                  index << 2, TPS65218_PROTECT_L1);
227 }
228
229 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
230 {
231         int retval;
232         unsigned int index;
233         struct tps65218 *tps = rdev_get_drvdata(dev);
234
235         retval = regmap_read(tps->regmap, dev->desc->csel_reg, &index);
236         if (retval < 0)
237                 return retval;
238
239         index = (index & dev->desc->csel_mask) >> 2;
240
241         return ls3_currents[index];
242 }
243
244 static struct regulator_ops tps65218_ls3_ops = {
245         .is_enabled             = regulator_is_enabled_regmap,
246         .enable                 = tps65218_pmic_enable,
247         .disable                = tps65218_pmic_disable,
248         .set_input_current_limit = tps65218_pmic_set_input_current_lim,
249         .set_current_limit      = tps65218_pmic_set_current_limit,
250         .get_current_limit      = tps65218_pmic_get_current_limit,
251 };
252
253 /* Operations permitted on DCDC5, DCDC6 */
254 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
255         .is_enabled             = regulator_is_enabled_regmap,
256         .enable                 = tps65218_pmic_enable,
257         .disable                = tps65218_pmic_disable,
258         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
259         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
260 };
261
262 static const struct regulator_desc regulators[] = {
263         TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1,
264                            REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
265                            TPS65218_REG_CONTROL_DCDC1,
266                            TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
267                            TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
268                            2, 4000, 0, TPS65218_REG_SEQ3,
269                            TPS65218_SEQ3_DC1_SEQ_MASK),
270         TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2,
271                            REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
272                            TPS65218_REG_CONTROL_DCDC2,
273                            TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
274                            TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
275                            2, 4000, 0, TPS65218_REG_SEQ3,
276                            TPS65218_SEQ3_DC2_SEQ_MASK),
277         TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3,
278                            REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
279                            TPS65218_REG_CONTROL_DCDC3,
280                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
281                            TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
282                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK),
283         TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4,
284                            REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53,
285                            TPS65218_REG_CONTROL_DCDC4,
286                            TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
287                            TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
288                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK),
289         TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5,
290                            REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,
291                            -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0,
292                            0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5,
293                            TPS65218_SEQ5_DC5_SEQ_MASK),
294         TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6,
295                            REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,
296                            -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0,
297                            0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5,
298                            TPS65218_SEQ5_DC6_SEQ_MASK),
299         TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1,
300                            REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
301                            TPS65218_REG_CONTROL_LDO1,
302                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
303                            TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
304                            2, 0, 0, TPS65218_REG_SEQ6,
305                            TPS65218_SEQ6_LDO1_SEQ_MASK),
306         TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3,
307                            REGULATOR_CURRENT, tps65218_ls3_ops, 0, 0, 0,
308                            TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN,
309                            TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK,
310                            NULL, 0, 0, 0, 0, 0),
311 };
312
313 static int tps65218_regulator_probe(struct platform_device *pdev)
314 {
315         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
316         struct regulator_dev *rdev;
317         struct regulator_config config = { };
318         int i, ret;
319         unsigned int val;
320
321         config.dev = &pdev->dev;
322         config.dev->of_node = tps->dev->of_node;
323         config.driver_data = tps;
324         config.regmap = tps->regmap;
325
326         /* Allocate memory for strobes */
327         tps->strobes = devm_kcalloc(&pdev->dev,
328                                     TPS65218_NUM_REGULATOR, sizeof(u8),
329                                     GFP_KERNEL);
330         if (!tps->strobes)
331                 return -ENOMEM;
332
333         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
334                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
335                                                &config);
336                 if (IS_ERR(rdev)) {
337                         dev_err(tps->dev, "failed to register %s regulator\n",
338                                 pdev->name);
339                         return PTR_ERR(rdev);
340                 }
341
342                 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val);
343                 if (ret)
344                         return ret;
345
346                 tps->strobes[i] = val & regulators[i].bypass_mask;
347         }
348
349         return 0;
350 }
351
352 static const struct platform_device_id tps65218_regulator_id_table[] = {
353         { "tps65218-regulator", },
354         { /* sentinel */ }
355 };
356 MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table);
357
358 static struct platform_driver tps65218_regulator_driver = {
359         .driver = {
360                 .name = "tps65218-pmic",
361         },
362         .probe = tps65218_regulator_probe,
363         .id_table = tps65218_regulator_id_table,
364 };
365
366 module_platform_driver(tps65218_regulator_driver);
367
368 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
369 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
370 MODULE_ALIAS("platform:tps65218-pmic");
371 MODULE_LICENSE("GPL v2");