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Linux/drivers/regulator/88pm800.c

  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 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. */
145 static 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. */
151 static 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 
156 static 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 
161 static 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. */
166 static 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. */
172 static const unsigned int ldo18_19_volt_table[] = {
173         1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
174 };
175 
176 static 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 
183 static 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 
194 static 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) */
206 static 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 
234 static 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 
293 static struct platform_driver pm800_regulator_driver = {
294         .driver         = {
295                 .name   = "88pm80x-regulator",
296         },
297         .probe          = pm800_regulator_probe,
298 };
299 
300 module_platform_driver(pm800_regulator_driver);
301 
302 MODULE_LICENSE("GPL");
303 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
304 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
305 MODULE_ALIAS("platform:88pm800-regulator");
306 

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