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Chao Xie95f1dc02013-07-17 23:07:03 -04001/*
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_BUCK3 (0x41)
56#define PM800_BUCK4 (0x42)
57#define PM800_BUCK4_1 (0x43)
58#define PM800_BUCK4_2 (0x44)
59#define PM800_BUCK4_3 (0x45)
60#define PM800_BUCK5 (0x46)
61
62#define PM800_BUCK_ENA (0x50)
63#define PM800_LDO_ENA1_1 (0x51)
64#define PM800_LDO_ENA1_2 (0x52)
65#define PM800_LDO_ENA1_3 (0x53)
66
67#define PM800_LDO_ENA2_1 (0x56)
68#define PM800_LDO_ENA2_2 (0x57)
69#define PM800_LDO_ENA2_3 (0x58)
70
71#define PM800_BUCK1_MISC1 (0x78)
72#define PM800_BUCK3_MISC1 (0x7E)
73#define PM800_BUCK4_MISC1 (0x81)
74#define PM800_BUCK5_MISC1 (0x84)
75
76struct pm800_regulator_info {
77 struct regulator_desc desc;
78 int max_ua;
79};
80
81struct pm800_regulators {
82 struct regulator_dev *regulators[PM800_ID_RG_MAX];
83 struct pm80x_chip *chip;
84 struct regmap *map;
85};
86
87/*
88 * vreg - the buck regs string.
89 * ereg - the string for the enable register.
90 * ebit - the bit number in the enable register.
91 * amax - the current
92 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
93 * not the constant voltage table.
94 */
95#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges) \
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 .linear_ranges = volt_ranges, \
104 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
105 .vsel_reg = PM800_##vreg, \
106 .vsel_mask = 0x7f, \
107 .enable_reg = PM800_##ereg, \
108 .enable_mask = 1 << (ebit), \
109 }, \
110 .max_ua = (amax), \
111}
112
113/*
114 * vreg - the LDO regs string
115 * ereg - the string for the enable register.
116 * ebit - the bit number in the enable register.
117 * amax - the current
118 * volt_table - the LDO voltage table
119 * For all the LDOes, there are too many ranges. Using volt_table will be
120 * simpler and faster.
121 */
122#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table) \
123{ \
124 .desc = { \
125 .name = #vreg, \
126 .ops = &pm800_volt_table_ops, \
127 .type = REGULATOR_VOLTAGE, \
128 .id = PM800_ID_##vreg, \
129 .owner = THIS_MODULE, \
130 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
131 .vsel_reg = PM800_##vreg##_VOUT, \
132 .vsel_mask = 0x1f, \
133 .enable_reg = PM800_##ereg, \
134 .enable_mask = 1 << (ebit), \
135 .volt_table = ldo_volt_table, \
136 }, \
137 .max_ua = (amax), \
138}
139
140/* Ranges are sorted in ascending order. */
141static const struct regulator_linear_range buck1_volt_range[] = {
142 { .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
143 .uV_step = 12500 },
144 { .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,
145 .max_sel = 0x54, .uV_step = 50000 },
146};
147
148/* BUCK 2~5 have same ranges. */
149static const struct regulator_linear_range buck2_5_volt_range[] = {
150 { .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
151 .uV_step = 12500 },
152 { .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,
153 .max_sel = 0x72, .uV_step = 50000 },
154};
155
156static const unsigned int ldo1_volt_table[] = {
157 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000,
158 1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
159};
160
161static const unsigned int ldo2_volt_table[] = {
162 1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
163};
164
165/* LDO 3~17 have same voltage table. */
166static const unsigned int ldo3_17_volt_table[] = {
167 1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
168 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
169};
170
171/* LDO 18~19 have same voltage table. */
172static const unsigned int ldo18_19_volt_table[] = {
173 1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
174};
175
176static int pm800_get_current_limit(struct regulator_dev *rdev)
177{
178 struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
179
180 return info->max_ua;
181}
182
183static struct regulator_ops pm800_volt_range_ops = {
184 .list_voltage = regulator_list_voltage_linear_range,
185 .map_voltage = regulator_map_voltage_linear_range,
186 .set_voltage_sel = regulator_set_voltage_sel_regmap,
187 .get_voltage_sel = regulator_get_voltage_sel_regmap,
188 .enable = regulator_enable_regmap,
189 .disable = regulator_disable_regmap,
190 .is_enabled = regulator_is_enabled_regmap,
191 .get_current_limit = pm800_get_current_limit,
192};
193
194static struct regulator_ops pm800_volt_table_ops = {
195 .list_voltage = regulator_list_voltage_table,
196 .map_voltage = regulator_map_voltage_iterate,
197 .set_voltage_sel = regulator_set_voltage_sel_regmap,
198 .get_voltage_sel = regulator_get_voltage_sel_regmap,
199 .enable = regulator_enable_regmap,
200 .disable = regulator_disable_regmap,
201 .is_enabled = regulator_is_enabled_regmap,
202 .get_current_limit = pm800_get_current_limit,
203};
204
205/* The array is indexed by id(PM800_ID_XXX) */
206static struct pm800_regulator_info pm800_regulator_info[] = {
207 PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range),
208 PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range),
209 PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range),
210 PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range),
211 PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range),
212
213 PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
214 PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
215 PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
216 PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
217 PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
218 PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
219 PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
220 PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
221 PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
222 PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
223 PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
224 PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
225 PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
226 PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
227 PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
228 PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
229 PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
230 PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
231 PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
232};
233
234#define PM800_REGULATOR_OF_MATCH(_name, _id) \
235 [PM800_ID_##_id] = { \
236 .name = #_name, \
237 .driver_data = &pm800_regulator_info[PM800_ID_##_id], \
238 }
239
240static struct of_regulator_match pm800_regulator_matches[] = {
241 PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
242 PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
243 PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
244 PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
245 PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
246 PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
247 PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
248 PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
249 PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
250 PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
251 PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
252 PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
253 PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
254 PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
255 PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
256 PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
257 PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
258 PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
259 PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
260 PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
261 PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
262 PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
263 PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
264 PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
265};
266
267static int pm800_regulator_dt_init(struct platform_device *pdev)
268{
269 struct device_node *np = pdev->dev.of_node;
270 int ret;
271
272 ret = of_regulator_match(&pdev->dev, np,
273 pm800_regulator_matches,
274 ARRAY_SIZE(pm800_regulator_matches));
275 if (ret < 0)
276 return ret;
277
278 return 0;
279}
280
281static int pm800_regulator_probe(struct platform_device *pdev)
282{
283 struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
284 struct pm80x_platform_data *pdata = pdev->dev.parent->platform_data;
285 struct pm800_regulators *pm800_data;
286 struct pm800_regulator_info *info;
287 struct regulator_config config = { };
288 struct regulator_init_data *init_data;
289 int i, ret;
290
291 if (!pdata || pdata->num_regulators == 0) {
292 if (IS_ENABLED(CONFIG_OF)) {
293 ret = pm800_regulator_dt_init(pdev);
294 if (ret)
295 return ret;
296 } else {
297 return -ENODEV;
298 }
299 } else if (pdata->num_regulators) {
300 /* Check whether num_regulator is valid. */
301 unsigned int count = 0;
302 for (i = 0; pdata->regulators[i]; i++)
303 count++;
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 dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
314 return -ENOMEM;
315 }
316
317 pm800_data->map = chip->subchip->regmap_power;
318 pm800_data->chip = chip;
319
320 platform_set_drvdata(pdev, pm800_data);
321
322 for (i = 0; i < PM800_ID_RG_MAX; i++) {
323 if (!pdata || pdata->num_regulators == 0)
324 init_data = pm800_regulator_matches[i].init_data;
325 else
326 init_data = pdata->regulators[i];
327 if (!init_data)
328 continue;
329 info = pm800_regulator_matches[i].driver_data;
330 config.dev = &pdev->dev;
331 config.init_data = init_data;
332 config.driver_data = info;
333 config.regmap = pm800_data->map;
Axel Line5e80f62013-07-19 09:16:55 +0800334 config.of_node = pm800_regulator_matches[i].of_node;
Chao Xie95f1dc02013-07-17 23:07:03 -0400335
336 pm800_data->regulators[i] =
337 regulator_register(&info->desc, &config);
338 if (IS_ERR(pm800_data->regulators[i])) {
339 ret = PTR_ERR(pm800_data->regulators[i]);
340 dev_err(&pdev->dev, "Failed to register %s\n",
341 info->desc.name);
342
343 while (--i >= 0)
344 regulator_unregister(pm800_data->regulators[i]);
345
346 return ret;
347 }
348 }
349
350 return 0;
351}
352
353static int pm800_regulator_remove(struct platform_device *pdev)
354{
355 struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
356 int i;
357
358 for (i = 0; i < PM800_ID_RG_MAX; i++)
359 regulator_unregister(pm800_data->regulators[i]);
360
361 return 0;
362}
363
364static struct platform_driver pm800_regulator_driver = {
365 .driver = {
366 .name = "88pm80x-regulator",
367 .owner = THIS_MODULE,
368 },
369 .probe = pm800_regulator_probe,
370 .remove = pm800_regulator_remove,
371};
372
373module_platform_driver(pm800_regulator_driver);
374
375MODULE_LICENSE("GPL");
376MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
377MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
378MODULE_ALIAS("platform:88pm800-regulator");