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
75struct pm800_regulator_info {
76 struct regulator_desc desc;
77 int max_ua;
78};
79
80struct pm800_regulators {
81 struct pm80x_chip *chip;
82 struct regmap *map;
83};
84
85/*
86 * vreg - the buck regs string.
87 * ereg - the string for the enable register.
88 * ebit - the bit number in the enable register.
89 * amax - the current
90 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
91 * not the constant voltage table.
92 * n_volt - Number of available selectors
93 */
94#define PM800_BUCK(match, vreg, ereg, ebit, amax, volt_ranges, n_volt) \
95{ \
96 .desc = { \
97 .name = #vreg, \
98 .of_match = of_match_ptr(#match), \
99 .regulators_node = of_match_ptr("regulators"), \
100 .ops = &pm800_volt_range_ops, \
101 .type = REGULATOR_VOLTAGE, \
102 .id = PM800_ID_##vreg, \
103 .owner = THIS_MODULE, \
104 .n_voltages = n_volt, \
105 .linear_ranges = volt_ranges, \
106 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
107 .vsel_reg = PM800_##vreg, \
108 .vsel_mask = 0x7f, \
109 .enable_reg = PM800_##ereg, \
110 .enable_mask = 1 << (ebit), \
111 }, \
112 .max_ua = (amax), \
113}
114
115/*
116 * vreg - the LDO regs string
117 * ereg - the string for the enable register.
118 * ebit - the bit number in the enable register.
119 * amax - the current
120 * volt_table - the LDO voltage table
121 * For all the LDOes, there are too many ranges. Using volt_table will be
122 * simpler and faster.
123 */
124#define PM800_LDO(match, vreg, ereg, ebit, amax, ldo_volt_table) \
125{ \
126 .desc = { \
127 .name = #vreg, \
128 .of_match = of_match_ptr(#match), \
129 .regulators_node = of_match_ptr("regulators"), \
130 .ops = &pm800_volt_table_ops, \
131 .type = REGULATOR_VOLTAGE, \
132 .id = PM800_ID_##vreg, \
133 .owner = THIS_MODULE, \
134 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
135 .vsel_reg = PM800_##vreg##_VOUT, \
136 .vsel_mask = 0xf, \
137 .enable_reg = PM800_##ereg, \
138 .enable_mask = 1 << (ebit), \
139 .volt_table = ldo_volt_table, \
140 }, \
141 .max_ua = (amax), \
142}
143
144/* Ranges are sorted in ascending order. */
145static const struct regulator_linear_range buck1_volt_range[] = {
146 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
147 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
148};
149
150/* BUCK 2~5 have same ranges. */
151static const struct regulator_linear_range buck2_5_volt_range[] = {
152 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
153 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 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 const 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 const 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, BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
208 PM800_BUCK(buck2, BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
209 PM800_BUCK(buck3, BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
210 PM800_BUCK(buck4, BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
211 PM800_BUCK(buck5, BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
212
213 PM800_LDO(ldo1, LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
214 PM800_LDO(ldo2, LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
215 PM800_LDO(ldo3, LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
216 PM800_LDO(ldo4, LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
217 PM800_LDO(ldo5, LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
218 PM800_LDO(ldo6, LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
219 PM800_LDO(ldo7, LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
220 PM800_LDO(ldo8, LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
221 PM800_LDO(ldo9, LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
222 PM800_LDO(ldo10, LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
223 PM800_LDO(ldo11, LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
224 PM800_LDO(ldo12, LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
225 PM800_LDO(ldo13, LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
226 PM800_LDO(ldo14, LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
227 PM800_LDO(ldo15, LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
228 PM800_LDO(ldo16, LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
229 PM800_LDO(ldo17, LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
230 PM800_LDO(ldo18, LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
231 PM800_LDO(ldo19, LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
232};
233
234static int pm800_regulator_probe(struct platform_device *pdev)
235{
236 struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
237 struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
238 struct pm800_regulators *pm800_data;
239 struct regulator_config config = { };
240 struct regulator_init_data *init_data;
241 int i, ret;
242
243 if (pdata && pdata->num_regulators) {
244 unsigned int count = 0;
245
246 /* Check whether num_regulator is valid. */
247 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
248 if (pdata->regulators[i])
249 count++;
250 }
251 if (count != pdata->num_regulators)
252 return -EINVAL;
253 }
254
255 pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
256 GFP_KERNEL);
257 if (!pm800_data)
258 return -ENOMEM;
259
260 pm800_data->map = chip->subchip->regmap_power;
261 pm800_data->chip = chip;
262
263 platform_set_drvdata(pdev, pm800_data);
264
265 config.dev = chip->dev;
266 config.regmap = pm800_data->map;
267 for (i = 0; i < PM800_ID_RG_MAX; i++) {
268 struct regulator_dev *regulator;
269
270 if (pdata && pdata->num_regulators) {
271 init_data = pdata->regulators[i];
272 if (!init_data)
273 continue;
274
275 config.init_data = init_data;
276 }
277
278 config.driver_data = &pm800_regulator_info[i];
279
280 regulator = devm_regulator_register(&pdev->dev,
281 &pm800_regulator_info[i].desc, &config);
282 if (IS_ERR(regulator)) {
283 ret = PTR_ERR(regulator);
284 dev_err(&pdev->dev, "Failed to register %s\n",
285 pm800_regulator_info[i].desc.name);
286 return ret;
287 }
288 }
289
290 return 0;
291}
292
293static struct platform_driver pm800_regulator_driver = {
294 .driver = {
295 .name = "88pm80x-regulator",
296 },
297 .probe = pm800_regulator_probe,
298};
299
300module_platform_driver(pm800_regulator_driver);
301
302MODULE_LICENSE("GPL");
303MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
304MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
305MODULE_ALIAS("platform:88pm800-regulator");
306