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1/* NXP PCF50633 PMIC Driver
2 *
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Balaji Rao <balajirrao@openmoko.org>
5 * All rights reserved.
6 *
7 * Broken down from monstrous PCF50633 driver mainly by
8 * Harald Welte and Andy Green and Werner Almesberger
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/device.h>
21#include <linux/err.h>
22#include <linux/platform_device.h>
23
24#include <linux/mfd/pcf50633/core.h>
25#include <linux/mfd/pcf50633/pmic.h>
26
27#define PCF50633_REGULATOR(_name, _id, _n) \
28 { \
29 .name = _name, \
30 .id = _id, \
31 .ops = &pcf50633_regulator_ops, \
32 .n_voltages = _n, \
33 .type = REGULATOR_VOLTAGE, \
34 .owner = THIS_MODULE, \
35 }
36
37static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
38 [PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT,
39 [PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT,
40 [PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT,
41 [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT,
42 [PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT,
43 [PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT,
44 [PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT,
45 [PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT,
46 [PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT,
47 [PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT,
48 [PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT,
49};
50
51/* Bits from voltage value */
52static u8 auto_voltage_bits(unsigned int millivolts)
53{
54 if (millivolts < 1800)
55 return 0;
56 if (millivolts > 3800)
57 return 0xff;
58
59 millivolts -= 625;
60
61 return millivolts / 25;
62}
63
64static u8 down_voltage_bits(unsigned int millivolts)
65{
66 if (millivolts < 625)
67 return 0;
68 else if (millivolts > 3000)
69 return 0xff;
70
71 millivolts -= 625;
72
73 return millivolts / 25;
74}
75
76static u8 ldo_voltage_bits(unsigned int millivolts)
77{
78 if (millivolts < 900)
79 return 0;
80 else if (millivolts > 3600)
81 return 0x1f;
82
83 millivolts -= 900;
84 return millivolts / 100;
85}
86
87/* Obtain voltage value from bits */
88static unsigned int auto_voltage_value(u8 bits)
89{
90 if (bits < 0x2f)
91 return 0;
92
93 return 625 + (bits * 25);
94}
95
96
97static unsigned int down_voltage_value(u8 bits)
98{
99 return 625 + (bits * 25);
100}
101
102
103static unsigned int ldo_voltage_value(u8 bits)
104{
105 bits &= 0x1f;
106
107 return 900 + (bits * 100);
108}
109
110static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
111 int min_uV, int max_uV,
112 unsigned *selector)
113{
114 struct pcf50633 *pcf;
115 int regulator_id, millivolts;
116 u8 volt_bits, regnr;
117
118 pcf = rdev_get_drvdata(rdev);
119
120 regulator_id = rdev_get_id(rdev);
121 if (regulator_id >= PCF50633_NUM_REGULATORS)
122 return -EINVAL;
123
124 millivolts = min_uV / 1000;
125
126 regnr = pcf50633_regulator_registers[regulator_id];
127
128 switch (regulator_id) {
129 case PCF50633_REGULATOR_AUTO:
130 volt_bits = auto_voltage_bits(millivolts);
131 break;
132 case PCF50633_REGULATOR_DOWN1:
133 volt_bits = down_voltage_bits(millivolts);
134 break;
135 case PCF50633_REGULATOR_DOWN2:
136 volt_bits = down_voltage_bits(millivolts);
137 break;
138 case PCF50633_REGULATOR_LDO1:
139 case PCF50633_REGULATOR_LDO2:
140 case PCF50633_REGULATOR_LDO3:
141 case PCF50633_REGULATOR_LDO4:
142 case PCF50633_REGULATOR_LDO5:
143 case PCF50633_REGULATOR_LDO6:
144 case PCF50633_REGULATOR_HCLDO:
145 volt_bits = ldo_voltage_bits(millivolts);
146 break;
147 default:
148 return -EINVAL;
149 }
150
151 *selector = volt_bits;
152
153 return pcf50633_reg_write(pcf, regnr, volt_bits);
154}
155
156static int pcf50633_regulator_voltage_value(enum pcf50633_regulator_id id,
157 u8 bits)
158{
159 int millivolts;
160
161 switch (id) {
162 case PCF50633_REGULATOR_AUTO:
163 millivolts = auto_voltage_value(bits);
164 break;
165 case PCF50633_REGULATOR_DOWN1:
166 millivolts = down_voltage_value(bits);
167 break;
168 case PCF50633_REGULATOR_DOWN2:
169 millivolts = down_voltage_value(bits);
170 break;
171 case PCF50633_REGULATOR_LDO1:
172 case PCF50633_REGULATOR_LDO2:
173 case PCF50633_REGULATOR_LDO3:
174 case PCF50633_REGULATOR_LDO4:
175 case PCF50633_REGULATOR_LDO5:
176 case PCF50633_REGULATOR_LDO6:
177 case PCF50633_REGULATOR_HCLDO:
178 millivolts = ldo_voltage_value(bits);
179 break;
180 default:
181 return -EINVAL;
182 }
183
184 return millivolts * 1000;
185}
186
187static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev)
188{
189 struct pcf50633 *pcf;
190 int regulator_id;
191 u8 volt_bits, regnr;
192
193 pcf = rdev_get_drvdata(rdev);
194
195 regulator_id = rdev_get_id(rdev);
196 if (regulator_id >= PCF50633_NUM_REGULATORS)
197 return -EINVAL;
198
199 regnr = pcf50633_regulator_registers[regulator_id];
200
201 volt_bits = pcf50633_reg_read(pcf, regnr);
202
203 return pcf50633_regulator_voltage_value(regulator_id, volt_bits);
204}
205
206static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
207 unsigned int index)
208{
209 struct pcf50633 *pcf;
210 int regulator_id;
211
212 pcf = rdev_get_drvdata(rdev);
213
214 regulator_id = rdev_get_id(rdev);
215
216 switch (regulator_id) {
217 case PCF50633_REGULATOR_AUTO:
218 index += 0x2f;
219 break;
220 case PCF50633_REGULATOR_HCLDO:
221 index += 0x01;
222 break;
223 default:
224 break;
225 }
226
227 return pcf50633_regulator_voltage_value(regulator_id, index);
228}
229
230static int pcf50633_regulator_enable(struct regulator_dev *rdev)
231{
232 struct pcf50633 *pcf = rdev_get_drvdata(rdev);
233 int regulator_id;
234 u8 regnr;
235
236 regulator_id = rdev_get_id(rdev);
237 if (regulator_id >= PCF50633_NUM_REGULATORS)
238 return -EINVAL;
239
240 /* The *ENA register is always one after the *OUT register */
241 regnr = pcf50633_regulator_registers[regulator_id] + 1;
242
243 return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON,
244 PCF50633_REGULATOR_ON);
245}
246
247static int pcf50633_regulator_disable(struct regulator_dev *rdev)
248{
249 struct pcf50633 *pcf = rdev_get_drvdata(rdev);
250 int regulator_id;
251 u8 regnr;
252
253 regulator_id = rdev_get_id(rdev);
254 if (regulator_id >= PCF50633_NUM_REGULATORS)
255 return -EINVAL;
256
257 /* the *ENA register is always one after the *OUT register */
258 regnr = pcf50633_regulator_registers[regulator_id] + 1;
259
260 return pcf50633_reg_set_bit_mask(pcf, regnr,
261 PCF50633_REGULATOR_ON, 0);
262}
263
264static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev)
265{
266 struct pcf50633 *pcf = rdev_get_drvdata(rdev);
267 int regulator_id = rdev_get_id(rdev);
268 u8 regnr;
269
270 regulator_id = rdev_get_id(rdev);
271 if (regulator_id >= PCF50633_NUM_REGULATORS)
272 return -EINVAL;
273
274 /* the *ENA register is always one after the *OUT register */
275 regnr = pcf50633_regulator_registers[regulator_id] + 1;
276
277 return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON;
278}
279
280static struct regulator_ops pcf50633_regulator_ops = {
281 .set_voltage = pcf50633_regulator_set_voltage,
282 .get_voltage = pcf50633_regulator_get_voltage,
283 .list_voltage = pcf50633_regulator_list_voltage,
284 .enable = pcf50633_regulator_enable,
285 .disable = pcf50633_regulator_disable,
286 .is_enabled = pcf50633_regulator_is_enabled,
287};
288
289static struct regulator_desc regulators[] = {
290 [PCF50633_REGULATOR_AUTO] =
291 PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO, 80),
292 [PCF50633_REGULATOR_DOWN1] =
293 PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1, 95),
294 [PCF50633_REGULATOR_DOWN2] =
295 PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2, 95),
296 [PCF50633_REGULATOR_LDO1] =
297 PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1, 27),
298 [PCF50633_REGULATOR_LDO2] =
299 PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2, 27),
300 [PCF50633_REGULATOR_LDO3] =
301 PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3, 27),
302 [PCF50633_REGULATOR_LDO4] =
303 PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4, 27),
304 [PCF50633_REGULATOR_LDO5] =
305 PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5, 27),
306 [PCF50633_REGULATOR_LDO6] =
307 PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6, 27),
308 [PCF50633_REGULATOR_HCLDO] =
309 PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO, 26),
310 [PCF50633_REGULATOR_MEMLDO] =
311 PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO, 0),
312};
313
314static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
315{
316 struct regulator_dev *rdev;
317 struct pcf50633 *pcf;
318
319 /* Already set by core driver */
320 pcf = dev_to_pcf50633(pdev->dev.parent);
321
322 rdev = regulator_register(®ulators[pdev->id], &pdev->dev,
323 pdev->dev.platform_data, pcf);
324 if (IS_ERR(rdev))
325 return PTR_ERR(rdev);
326
327 platform_set_drvdata(pdev, rdev);
328
329 if (pcf->pdata->regulator_registered)
330 pcf->pdata->regulator_registered(pcf, pdev->id);
331
332 return 0;
333}
334
335static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
336{
337 struct regulator_dev *rdev = platform_get_drvdata(pdev);
338
339 platform_set_drvdata(pdev, NULL);
340 regulator_unregister(rdev);
341
342 return 0;
343}
344
345static struct platform_driver pcf50633_regulator_driver = {
346 .driver = {
347 .name = "pcf50633-regltr",
348 },
349 .probe = pcf50633_regulator_probe,
350 .remove = __devexit_p(pcf50633_regulator_remove),
351};
352
353static int __init pcf50633_regulator_init(void)
354{
355 return platform_driver_register(&pcf50633_regulator_driver);
356}
357subsys_initcall(pcf50633_regulator_init);
358
359static void __exit pcf50633_regulator_exit(void)
360{
361 platform_driver_unregister(&pcf50633_regulator_driver);
362}
363module_exit(pcf50633_regulator_exit);
364
365MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
366MODULE_DESCRIPTION("PCF50633 regulator driver");
367MODULE_LICENSE("GPL");
368MODULE_ALIAS("platform:pcf50633-regulator");
1/* NXP PCF50633 PMIC Driver
2 *
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Balaji Rao <balajirrao@openmoko.org>
5 * All rights reserved.
6 *
7 * Broken down from monstrous PCF50633 driver mainly by
8 * Harald Welte and Andy Green and Werner Almesberger
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/device.h>
21#include <linux/err.h>
22#include <linux/platform_device.h>
23
24#include <linux/mfd/pcf50633/core.h>
25#include <linux/mfd/pcf50633/pmic.h>
26
27#define PCF50633_REGULATOR(_name, _id, _min_uV, _uV_step, _min_sel, _n) \
28 { \
29 .name = _name, \
30 .id = PCF50633_REGULATOR_##_id, \
31 .ops = &pcf50633_regulator_ops, \
32 .n_voltages = _n, \
33 .min_uV = _min_uV, \
34 .uV_step = _uV_step, \
35 .linear_min_sel = _min_sel, \
36 .type = REGULATOR_VOLTAGE, \
37 .owner = THIS_MODULE, \
38 .vsel_reg = PCF50633_REG_##_id##OUT, \
39 .vsel_mask = 0xff, \
40 .enable_reg = PCF50633_REG_##_id##OUT + 1, \
41 .enable_mask = PCF50633_REGULATOR_ON, \
42 }
43
44static struct regulator_ops pcf50633_regulator_ops = {
45 .set_voltage_sel = regulator_set_voltage_sel_regmap,
46 .get_voltage_sel = regulator_get_voltage_sel_regmap,
47 .list_voltage = regulator_list_voltage_linear,
48 .map_voltage = regulator_map_voltage_linear,
49 .enable = regulator_enable_regmap,
50 .disable = regulator_disable_regmap,
51 .is_enabled = regulator_is_enabled_regmap,
52};
53
54static const struct regulator_desc regulators[] = {
55 [PCF50633_REGULATOR_AUTO] =
56 PCF50633_REGULATOR("auto", AUTO, 1800000, 25000, 0x2f, 128),
57 [PCF50633_REGULATOR_DOWN1] =
58 PCF50633_REGULATOR("down1", DOWN1, 625000, 25000, 0, 96),
59 [PCF50633_REGULATOR_DOWN2] =
60 PCF50633_REGULATOR("down2", DOWN2, 625000, 25000, 0, 96),
61 [PCF50633_REGULATOR_LDO1] =
62 PCF50633_REGULATOR("ldo1", LDO1, 900000, 100000, 0, 28),
63 [PCF50633_REGULATOR_LDO2] =
64 PCF50633_REGULATOR("ldo2", LDO2, 900000, 100000, 0, 28),
65 [PCF50633_REGULATOR_LDO3] =
66 PCF50633_REGULATOR("ldo3", LDO3, 900000, 100000, 0, 28),
67 [PCF50633_REGULATOR_LDO4] =
68 PCF50633_REGULATOR("ldo4", LDO4, 900000, 100000, 0, 28),
69 [PCF50633_REGULATOR_LDO5] =
70 PCF50633_REGULATOR("ldo5", LDO5, 900000, 100000, 0, 28),
71 [PCF50633_REGULATOR_LDO6] =
72 PCF50633_REGULATOR("ldo6", LDO6, 900000, 100000, 0, 28),
73 [PCF50633_REGULATOR_HCLDO] =
74 PCF50633_REGULATOR("hcldo", HCLDO, 900000, 100000, 0, 28),
75 [PCF50633_REGULATOR_MEMLDO] =
76 PCF50633_REGULATOR("memldo", MEMLDO, 900000, 100000, 0, 28),
77};
78
79static int pcf50633_regulator_probe(struct platform_device *pdev)
80{
81 struct regulator_dev *rdev;
82 struct pcf50633 *pcf;
83 struct regulator_config config = { };
84
85 /* Already set by core driver */
86 pcf = dev_to_pcf50633(pdev->dev.parent);
87
88 config.dev = &pdev->dev;
89 config.init_data = dev_get_platdata(&pdev->dev);
90 config.driver_data = pcf;
91 config.regmap = pcf->regmap;
92
93 rdev = devm_regulator_register(&pdev->dev, ®ulators[pdev->id],
94 &config);
95 if (IS_ERR(rdev))
96 return PTR_ERR(rdev);
97
98 platform_set_drvdata(pdev, rdev);
99
100 if (pcf->pdata->regulator_registered)
101 pcf->pdata->regulator_registered(pcf, pdev->id);
102
103 return 0;
104}
105
106static struct platform_driver pcf50633_regulator_driver = {
107 .driver = {
108 .name = "pcf50633-regulator",
109 },
110 .probe = pcf50633_regulator_probe,
111};
112
113static int __init pcf50633_regulator_init(void)
114{
115 return platform_driver_register(&pcf50633_regulator_driver);
116}
117subsys_initcall(pcf50633_regulator_init);
118
119static void __exit pcf50633_regulator_exit(void)
120{
121 platform_driver_unregister(&pcf50633_regulator_driver);
122}
123module_exit(pcf50633_regulator_exit);
124
125MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
126MODULE_DESCRIPTION("PCF50633 regulator driver");
127MODULE_LICENSE("GPL");
128MODULE_ALIAS("platform:pcf50633-regulator");