Merge tag 'xtensa-20230523' of https://github.com/jcmvbkbc/linux-xtensa
[platform/kernel/linux-starfive.git] / drivers / regulator / 88pm800-regulator.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Regulators driver for Marvell 88PM800
4  *
5  * Copyright (C) 2012 Marvell International Ltd.
6  * Joseph(Yossi) Hanin <yhanin@marvell.com>
7  * Yi Zhang <yizhang@marvell.com>
8  */
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/init.h>
12 #include <linux/err.h>
13 #include <linux/regmap.h>
14 #include <linux/regulator/driver.h>
15 #include <linux/regulator/machine.h>
16 #include <linux/mfd/88pm80x.h>
17 #include <linux/delay.h>
18 #include <linux/io.h>
19 #include <linux/of.h>
20 #include <linux/regulator/of_regulator.h>
21
22 /* LDO1 with DVC[0..3] */
23 #define PM800_LDO1_VOUT         (0x08) /* VOUT1 */
24 #define PM800_LDO1_VOUT_2       (0x09)
25 #define PM800_LDO1_VOUT_3       (0x0A)
26 #define PM800_LDO2_VOUT         (0x0B)
27 #define PM800_LDO3_VOUT         (0x0C)
28 #define PM800_LDO4_VOUT         (0x0D)
29 #define PM800_LDO5_VOUT         (0x0E)
30 #define PM800_LDO6_VOUT         (0x0F)
31 #define PM800_LDO7_VOUT         (0x10)
32 #define PM800_LDO8_VOUT         (0x11)
33 #define PM800_LDO9_VOUT         (0x12)
34 #define PM800_LDO10_VOUT        (0x13)
35 #define PM800_LDO11_VOUT        (0x14)
36 #define PM800_LDO12_VOUT        (0x15)
37 #define PM800_LDO13_VOUT        (0x16)
38 #define PM800_LDO14_VOUT        (0x17)
39 #define PM800_LDO15_VOUT        (0x18)
40 #define PM800_LDO16_VOUT        (0x19)
41 #define PM800_LDO17_VOUT        (0x1A)
42 #define PM800_LDO18_VOUT        (0x1B)
43 #define PM800_LDO19_VOUT        (0x1C)
44
45 /* BUCK1 with DVC[0..3] */
46 #define PM800_BUCK1             (0x3C)
47 #define PM800_BUCK1_1           (0x3D)
48 #define PM800_BUCK1_2           (0x3E)
49 #define PM800_BUCK1_3           (0x3F)
50 #define PM800_BUCK2             (0x40)
51 #define PM800_BUCK3             (0x41)
52 #define PM800_BUCK4             (0x42)
53 #define PM800_BUCK4_1           (0x43)
54 #define PM800_BUCK4_2           (0x44)
55 #define PM800_BUCK4_3           (0x45)
56 #define PM800_BUCK5             (0x46)
57
58 #define PM800_BUCK_ENA          (0x50)
59 #define PM800_LDO_ENA1_1        (0x51)
60 #define PM800_LDO_ENA1_2        (0x52)
61 #define PM800_LDO_ENA1_3        (0x53)
62
63 #define PM800_LDO_ENA2_1        (0x56)
64 #define PM800_LDO_ENA2_2        (0x57)
65 #define PM800_LDO_ENA2_3        (0x58)
66
67 #define PM800_BUCK1_MISC1       (0x78)
68 #define PM800_BUCK3_MISC1       (0x7E)
69 #define PM800_BUCK4_MISC1       (0x81)
70 #define PM800_BUCK5_MISC1       (0x84)
71
72 struct pm800_regulator_info {
73         struct regulator_desc desc;
74         int max_ua;
75 };
76
77 /*
78  * vreg - the buck regs string.
79  * ereg - the string for the enable register.
80  * ebit - the bit number in the enable register.
81  * amax - the current
82  * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
83  * not the constant voltage table.
84  * n_volt - Number of available selectors
85  */
86 #define PM800_BUCK(match, vreg, ereg, ebit, amax, volt_ranges, n_volt)  \
87 {                                                                       \
88         .desc   = {                                                     \
89                 .name                   = #vreg,                        \
90                 .of_match               = of_match_ptr(#match),         \
91                 .regulators_node        = of_match_ptr("regulators"),   \
92                 .ops                    = &pm800_volt_range_ops,        \
93                 .type                   = REGULATOR_VOLTAGE,            \
94                 .id                     = PM800_ID_##vreg,              \
95                 .owner                  = THIS_MODULE,                  \
96                 .n_voltages             = n_volt,                       \
97                 .linear_ranges          = volt_ranges,                  \
98                 .n_linear_ranges        = ARRAY_SIZE(volt_ranges),      \
99                 .vsel_reg               = PM800_##vreg,                 \
100                 .vsel_mask              = 0x7f,                         \
101                 .enable_reg             = PM800_##ereg,                 \
102                 .enable_mask            = 1 << (ebit),                  \
103         },                                                              \
104         .max_ua = (amax),                                               \
105 }
106
107 /*
108  * vreg - the LDO regs string
109  * ereg -  the string for the enable register.
110  * ebit - the bit number in the enable register.
111  * amax - the current
112  * volt_table - the LDO voltage table
113  * For all the LDOes, there are too many ranges. Using volt_table will be
114  * simpler and faster.
115  */
116 #define PM800_LDO(match, vreg, ereg, ebit, amax, ldo_volt_table)        \
117 {                                                                       \
118         .desc   = {                                                     \
119                 .name                   = #vreg,                        \
120                 .of_match               = of_match_ptr(#match),         \
121                 .regulators_node        = of_match_ptr("regulators"),   \
122                 .ops                    = &pm800_volt_table_ops,        \
123                 .type                   = REGULATOR_VOLTAGE,            \
124                 .id                     = PM800_ID_##vreg,              \
125                 .owner                  = THIS_MODULE,                  \
126                 .n_voltages             = ARRAY_SIZE(ldo_volt_table),   \
127                 .vsel_reg               = PM800_##vreg##_VOUT,          \
128                 .vsel_mask              = 0xf,                          \
129                 .enable_reg             = PM800_##ereg,                 \
130                 .enable_mask            = 1 << (ebit),                  \
131                 .volt_table             = ldo_volt_table,               \
132         },                                                              \
133         .max_ua = (amax),                                               \
134 }
135
136 /* Ranges are sorted in ascending order. */
137 static const struct linear_range buck1_volt_range[] = {
138         REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
139         REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
140 };
141
142 /* BUCK 2~5 have same ranges. */
143 static const struct linear_range buck2_5_volt_range[] = {
144         REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
145         REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
146 };
147
148 static const unsigned int ldo1_volt_table[] = {
149         600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
150         1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
151 };
152
153 static const unsigned int ldo2_volt_table[] = {
154         1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
155 };
156
157 /* LDO 3~17 have same voltage table. */
158 static const unsigned int ldo3_17_volt_table[] = {
159         1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
160         2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
161 };
162
163 /* LDO 18~19 have same voltage table. */
164 static const unsigned int ldo18_19_volt_table[] = {
165         1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
166 };
167
168 static int pm800_get_current_limit(struct regulator_dev *rdev)
169 {
170         struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
171
172         return info->max_ua;
173 }
174
175 static const struct regulator_ops pm800_volt_range_ops = {
176         .list_voltage           = regulator_list_voltage_linear_range,
177         .map_voltage            = regulator_map_voltage_linear_range,
178         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
179         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
180         .enable                 = regulator_enable_regmap,
181         .disable                = regulator_disable_regmap,
182         .is_enabled             = regulator_is_enabled_regmap,
183         .get_current_limit      = pm800_get_current_limit,
184 };
185
186 static const struct regulator_ops pm800_volt_table_ops = {
187         .list_voltage           = regulator_list_voltage_table,
188         .map_voltage            = regulator_map_voltage_iterate,
189         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
190         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
191         .enable                 = regulator_enable_regmap,
192         .disable                = regulator_disable_regmap,
193         .is_enabled             = regulator_is_enabled_regmap,
194         .get_current_limit      = pm800_get_current_limit,
195 };
196
197 /* The array is indexed by id(PM800_ID_XXX) */
198 static struct pm800_regulator_info pm800_regulator_info[] = {
199         PM800_BUCK(buck1, BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
200         PM800_BUCK(buck2, BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
201         PM800_BUCK(buck3, BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
202         PM800_BUCK(buck4, BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
203         PM800_BUCK(buck5, BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
204
205         PM800_LDO(ldo1, LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
206         PM800_LDO(ldo2, LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
207         PM800_LDO(ldo3, LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
208         PM800_LDO(ldo4, LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
209         PM800_LDO(ldo5, LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
210         PM800_LDO(ldo6, LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
211         PM800_LDO(ldo7, LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
212         PM800_LDO(ldo8, LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
213         PM800_LDO(ldo9, LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
214         PM800_LDO(ldo10, LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
215         PM800_LDO(ldo11, LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
216         PM800_LDO(ldo12, LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
217         PM800_LDO(ldo13, LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
218         PM800_LDO(ldo14, LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
219         PM800_LDO(ldo15, LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
220         PM800_LDO(ldo16, LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
221         PM800_LDO(ldo17, LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
222         PM800_LDO(ldo18, LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
223         PM800_LDO(ldo19, LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
224 };
225
226 static int pm800_regulator_probe(struct platform_device *pdev)
227 {
228         struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
229         struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
230         struct regulator_config config = { };
231         struct regulator_init_data *init_data;
232         int i, ret;
233
234         if (pdata && pdata->num_regulators) {
235                 unsigned int count = 0;
236
237                 /* Check whether num_regulator is valid. */
238                 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
239                         if (pdata->regulators[i])
240                                 count++;
241                 }
242                 if (count != pdata->num_regulators)
243                         return -EINVAL;
244         }
245
246         config.dev = chip->dev;
247         config.regmap = chip->subchip->regmap_power;
248         for (i = 0; i < PM800_ID_RG_MAX; i++) {
249                 struct regulator_dev *regulator;
250
251                 if (pdata && pdata->num_regulators) {
252                         init_data = pdata->regulators[i];
253                         if (!init_data)
254                                 continue;
255
256                         config.init_data = init_data;
257                 }
258
259                 config.driver_data = &pm800_regulator_info[i];
260
261                 regulator = devm_regulator_register(&pdev->dev,
262                                 &pm800_regulator_info[i].desc, &config);
263                 if (IS_ERR(regulator)) {
264                         ret = PTR_ERR(regulator);
265                         dev_err(&pdev->dev, "Failed to register %s\n",
266                                         pm800_regulator_info[i].desc.name);
267                         return ret;
268                 }
269         }
270
271         return 0;
272 }
273
274 static struct platform_driver pm800_regulator_driver = {
275         .driver         = {
276                 .name   = "88pm80x-regulator",
277                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
278         },
279         .probe          = pm800_regulator_probe,
280 };
281
282 module_platform_driver(pm800_regulator_driver);
283
284 MODULE_LICENSE("GPL");
285 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
286 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
287 MODULE_ALIAS("platform:88pm800-regulator");