1 /*
2 * Regulators driver for Marvell 88PM800
3 *
4 * Copyright (C) 2012 Marvell International Ltd.
5 * Joseph(Yossi) Hanin <yhanin@marvell.com>
6 * Yi Zhang <yizhang@marvell.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/init.h>
15 #include <linux/err.h>
16 #include <linux/regmap.h>
17 #include <linux/regulator/driver.h>
18 #include <linux/regulator/machine.h>
19 #include <linux/mfd/88pm80x.h>
20 #include <linux/delay.h>
21 #include <linux/io.h>
22 #include <linux/of.h>
23 #include <linux/regulator/of_regulator.h>
24
25 /* LDO1 with DVC[0..3] */
26 #define PM800_LDO1_VOUT (0x08) /* VOUT1 */
27 #define PM800_LDO1_VOUT_2 (0x09)
28 #define PM800_LDO1_VOUT_3 (0x0A)
29 #define PM800_LDO2_VOUT (0x0B)
30 #define PM800_LDO3_VOUT (0x0C)
31 #define PM800_LDO4_VOUT (0x0D)
32 #define PM800_LDO5_VOUT (0x0E)
33 #define PM800_LDO6_VOUT (0x0F)
34 #define PM800_LDO7_VOUT (0x10)
35 #define PM800_LDO8_VOUT (0x11)
36 #define PM800_LDO9_VOUT (0x12)
37 #define PM800_LDO10_VOUT (0x13)
38 #define PM800_LDO11_VOUT (0x14)
39 #define PM800_LDO12_VOUT (0x15)
40 #define PM800_LDO13_VOUT (0x16)
41 #define PM800_LDO14_VOUT (0x17)
42 #define PM800_LDO15_VOUT (0x18)
43 #define PM800_LDO16_VOUT (0x19)
44 #define PM800_LDO17_VOUT (0x1A)
45 #define PM800_LDO18_VOUT (0x1B)
46 #define PM800_LDO19_VOUT (0x1C)
47
48 /* BUCK1 with DVC[0..3] */
49 #define PM800_BUCK1 (0x3C)
50 #define PM800_BUCK1_1 (0x3D)
51 #define PM800_BUCK1_2 (0x3E)
52 #define PM800_BUCK1_3 (0x3F)
53 #define PM800_BUCK2 (0x40)
54 #define PM800_BUCK3 (0x41)
55 #define PM800_BUCK4 (0x42)
56 #define PM800_BUCK4_1 (0x43)
57 #define PM800_BUCK4_2 (0x44)
58 #define PM800_BUCK4_3 (0x45)
59 #define PM800_BUCK5 (0x46)
60
61 #define PM800_BUCK_ENA (0x50)
62 #define PM800_LDO_ENA1_1 (0x51)
63 #define PM800_LDO_ENA1_2 (0x52)
64 #define PM800_LDO_ENA1_3 (0x53)
65
66 #define PM800_LDO_ENA2_1 (0x56)
67 #define PM800_LDO_ENA2_2 (0x57)
68 #define PM800_LDO_ENA2_3 (0x58)
69
70 #define PM800_BUCK1_MISC1 (0x78)
71 #define PM800_BUCK3_MISC1 (0x7E)
72 #define PM800_BUCK4_MISC1 (0x81)
73 #define PM800_BUCK5_MISC1 (0x84)
74
75 struct pm800_regulator_info {
76 struct regulator_desc desc;
77 int max_ua;
78 };
79
80 struct pm800_regulators {
81 struct regulator_dev *regulators[PM800_ID_RG_MAX];
82 struct pm80x_chip *chip;
83 struct regmap *map;
84 };
85
86 /*
87 * vreg - the buck regs string.
88 * ereg - the string for the enable register.
89 * ebit - the bit number in the enable register.
90 * amax - the current
91 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
92 * not the constant voltage table.
93 * n_volt - Number of available selectors
94 */
95 #define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt) \
96 { \
97 .desc = { \
98 .name = #vreg, \
99 .ops = &pm800_volt_range_ops, \
100 .type = REGULATOR_VOLTAGE, \
101 .id = PM800_ID_##vreg, \
102 .owner = THIS_MODULE, \
103 .n_voltages = n_volt, \
104 .linear_ranges = volt_ranges, \
105 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
106 .vsel_reg = PM800_##vreg, \
107 .vsel_mask = 0x7f, \
108 .enable_reg = PM800_##ereg, \
109 .enable_mask = 1 << (ebit), \
110 }, \
111 .max_ua = (amax), \
112 }
113
114 /*
115 * vreg - the LDO regs string
116 * ereg - the string for the enable register.
117 * ebit - the bit number in the enable register.
118 * amax - the current
119 * volt_table - the LDO voltage table
120 * For all the LDOes, there are too many ranges. Using volt_table will be
121 * simpler and faster.
122 */
123 #define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table) \
124 { \
125 .desc = { \
126 .name = #vreg, \
127 .ops = &pm800_volt_table_ops, \
128 .type = REGULATOR_VOLTAGE, \
129 .id = PM800_ID_##vreg, \
130 .owner = THIS_MODULE, \
131 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
132 .vsel_reg = PM800_##vreg##_VOUT, \
133 .vsel_mask = 0x1f, \
134 .enable_reg = PM800_##ereg, \
135 .enable_mask = 1 << (ebit), \
136 .volt_table = ldo_volt_table, \
137 }, \
138 .max_ua = (amax), \
139 }
140
141 /* Ranges are sorted in ascending order. */
142 static const struct regulator_linear_range buck1_volt_range[] = {
143 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
144 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
145 };
146
147 /* BUCK 2~5 have same ranges. */
148 static const struct regulator_linear_range buck2_5_volt_range[] = {
149 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
150 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
151 };
152
153 static const unsigned int ldo1_volt_table[] = {
154 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000,
155 1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
156 };
157
158 static const unsigned int ldo2_volt_table[] = {
159 1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
160 };
161
162 /* LDO 3~17 have same voltage table. */
163 static const unsigned int ldo3_17_volt_table[] = {
164 1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
165 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
166 };
167
168 /* LDO 18~19 have same voltage table. */
169 static const unsigned int ldo18_19_volt_table[] = {
170 1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
171 };
172
pm800_get_current_limit(struct regulator_dev * rdev)173 static int pm800_get_current_limit(struct regulator_dev *rdev)
174 {
175 struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
176
177 return info->max_ua;
178 }
179
180 static struct regulator_ops pm800_volt_range_ops = {
181 .list_voltage = regulator_list_voltage_linear_range,
182 .map_voltage = regulator_map_voltage_linear_range,
183 .set_voltage_sel = regulator_set_voltage_sel_regmap,
184 .get_voltage_sel = regulator_get_voltage_sel_regmap,
185 .enable = regulator_enable_regmap,
186 .disable = regulator_disable_regmap,
187 .is_enabled = regulator_is_enabled_regmap,
188 .get_current_limit = pm800_get_current_limit,
189 };
190
191 static struct regulator_ops pm800_volt_table_ops = {
192 .list_voltage = regulator_list_voltage_table,
193 .map_voltage = regulator_map_voltage_iterate,
194 .set_voltage_sel = regulator_set_voltage_sel_regmap,
195 .get_voltage_sel = regulator_get_voltage_sel_regmap,
196 .enable = regulator_enable_regmap,
197 .disable = regulator_disable_regmap,
198 .is_enabled = regulator_is_enabled_regmap,
199 .get_current_limit = pm800_get_current_limit,
200 };
201
202 /* The array is indexed by id(PM800_ID_XXX) */
203 static struct pm800_regulator_info pm800_regulator_info[] = {
204 PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
205 PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
206 PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
207 PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
208 PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
209
210 PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
211 PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
212 PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
213 PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
214 PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
215 PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
216 PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
217 PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
218 PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
219 PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
220 PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
221 PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
222 PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
223 PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
224 PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
225 PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
226 PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
227 PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
228 PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
229 };
230
231 #define PM800_REGULATOR_OF_MATCH(_name, _id) \
232 [PM800_ID_##_id] = { \
233 .name = #_name, \
234 .driver_data = &pm800_regulator_info[PM800_ID_##_id], \
235 }
236
237 static struct of_regulator_match pm800_regulator_matches[] = {
238 PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
239 PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
240 PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
241 PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
242 PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
243 PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
244 PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
245 PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
246 PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
247 PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
248 PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
249 PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
250 PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
251 PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
252 PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
253 PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
254 PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
255 PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
256 PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
257 PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
258 PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
259 PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
260 PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
261 PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
262 };
263
pm800_regulator_dt_init(struct platform_device * pdev)264 static int pm800_regulator_dt_init(struct platform_device *pdev)
265 {
266 struct device_node *np = pdev->dev.of_node;
267 int ret;
268
269 ret = of_regulator_match(&pdev->dev, np,
270 pm800_regulator_matches,
271 ARRAY_SIZE(pm800_regulator_matches));
272 if (ret < 0)
273 return ret;
274
275 return 0;
276 }
277
pm800_regulator_probe(struct platform_device * pdev)278 static int pm800_regulator_probe(struct platform_device *pdev)
279 {
280 struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
281 struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
282 struct pm800_regulators *pm800_data;
283 struct pm800_regulator_info *info;
284 struct regulator_config config = { };
285 struct regulator_init_data *init_data;
286 int i, ret;
287
288 if (!pdata || pdata->num_regulators == 0) {
289 if (IS_ENABLED(CONFIG_OF)) {
290 ret = pm800_regulator_dt_init(pdev);
291 if (ret)
292 return ret;
293 } else {
294 return -ENODEV;
295 }
296 } else if (pdata->num_regulators) {
297 unsigned int count = 0;
298
299 /* Check whether num_regulator is valid. */
300 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
301 if (pdata->regulators[i])
302 count++;
303 }
304 if (count != pdata->num_regulators)
305 return -EINVAL;
306 } else {
307 return -EINVAL;
308 }
309
310 pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
311 GFP_KERNEL);
312 if (!pm800_data)
313 return -ENOMEM;
314
315 pm800_data->map = chip->subchip->regmap_power;
316 pm800_data->chip = chip;
317
318 platform_set_drvdata(pdev, pm800_data);
319
320 for (i = 0; i < PM800_ID_RG_MAX; i++) {
321 if (!pdata || pdata->num_regulators == 0)
322 init_data = pm800_regulator_matches[i].init_data;
323 else
324 init_data = pdata->regulators[i];
325 if (!init_data)
326 continue;
327 info = pm800_regulator_matches[i].driver_data;
328 config.dev = &pdev->dev;
329 config.init_data = init_data;
330 config.driver_data = info;
331 config.regmap = pm800_data->map;
332 config.of_node = pm800_regulator_matches[i].of_node;
333
334 pm800_data->regulators[i] =
335 regulator_register(&info->desc, &config);
336 if (IS_ERR(pm800_data->regulators[i])) {
337 ret = PTR_ERR(pm800_data->regulators[i]);
338 dev_err(&pdev->dev, "Failed to register %s\n",
339 info->desc.name);
340
341 while (--i >= 0)
342 regulator_unregister(pm800_data->regulators[i]);
343
344 return ret;
345 }
346 }
347
348 return 0;
349 }
350
pm800_regulator_remove(struct platform_device * pdev)351 static int pm800_regulator_remove(struct platform_device *pdev)
352 {
353 struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
354 int i;
355
356 for (i = 0; i < PM800_ID_RG_MAX; i++)
357 regulator_unregister(pm800_data->regulators[i]);
358
359 return 0;
360 }
361
362 static struct platform_driver pm800_regulator_driver = {
363 .driver = {
364 .name = "88pm80x-regulator",
365 .owner = THIS_MODULE,
366 },
367 .probe = pm800_regulator_probe,
368 .remove = pm800_regulator_remove,
369 };
370
371 module_platform_driver(pm800_regulator_driver);
372
373 MODULE_LICENSE("GPL");
374 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
375 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
376 MODULE_ALIAS("platform:88pm800-regulator");
377