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5ec271e7 BR |
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 | ||
a6576cff | 27 | #define PCF50633_REGULATOR(_name, _id, _n) \ |
5ec271e7 BR |
28 | { \ |
29 | .name = _name, \ | |
30 | .id = _id, \ | |
31 | .ops = &pcf50633_regulator_ops, \ | |
a6576cff | 32 | .n_voltages = _n, \ |
5ec271e7 BR |
33 | .type = REGULATOR_VOLTAGE, \ |
34 | .owner = THIS_MODULE, \ | |
35 | } | |
36 | ||
37 | static 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 */ | |
52 | static 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 | ||
64 | static 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 | ||
76 | static 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 */ | |
88 | static unsigned int auto_voltage_value(u8 bits) | |
89 | { | |
90 | if (bits < 0x2f) | |
91 | return 0; | |
92 | ||
93 | return 625 + (bits * 25); | |
94 | } | |
95 | ||
96 | ||
97 | static unsigned int down_voltage_value(u8 bits) | |
98 | { | |
99 | return 625 + (bits * 25); | |
100 | } | |
101 | ||
102 | ||
103 | static unsigned int ldo_voltage_value(u8 bits) | |
104 | { | |
105 | bits &= 0x1f; | |
106 | ||
107 | return 900 + (bits * 100); | |
108 | } | |
109 | ||
110 | static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev, | |
111 | int min_uV, int max_uV) | |
112 | { | |
113 | struct pcf50633 *pcf; | |
114 | int regulator_id, millivolts; | |
115 | u8 volt_bits, regnr; | |
116 | ||
117 | pcf = rdev_get_drvdata(rdev); | |
118 | ||
119 | regulator_id = rdev_get_id(rdev); | |
120 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
121 | return -EINVAL; | |
122 | ||
123 | millivolts = min_uV / 1000; | |
124 | ||
125 | regnr = pcf50633_regulator_registers[regulator_id]; | |
126 | ||
127 | switch (regulator_id) { | |
128 | case PCF50633_REGULATOR_AUTO: | |
129 | volt_bits = auto_voltage_bits(millivolts); | |
130 | break; | |
131 | case PCF50633_REGULATOR_DOWN1: | |
132 | volt_bits = down_voltage_bits(millivolts); | |
133 | break; | |
134 | case PCF50633_REGULATOR_DOWN2: | |
135 | volt_bits = down_voltage_bits(millivolts); | |
136 | break; | |
137 | case PCF50633_REGULATOR_LDO1: | |
138 | case PCF50633_REGULATOR_LDO2: | |
139 | case PCF50633_REGULATOR_LDO3: | |
140 | case PCF50633_REGULATOR_LDO4: | |
141 | case PCF50633_REGULATOR_LDO5: | |
142 | case PCF50633_REGULATOR_LDO6: | |
143 | case PCF50633_REGULATOR_HCLDO: | |
144 | volt_bits = ldo_voltage_bits(millivolts); | |
145 | break; | |
146 | default: | |
147 | return -EINVAL; | |
148 | } | |
149 | ||
150 | return pcf50633_reg_write(pcf, regnr, volt_bits); | |
151 | } | |
152 | ||
a6576cff LPC |
153 | static int pcf50633_regulator_voltage_value(enum pcf50633_regulator_id id, |
154 | u8 bits) | |
155 | { | |
156 | int millivolts; | |
157 | ||
158 | switch (id) { | |
159 | case PCF50633_REGULATOR_AUTO: | |
160 | millivolts = auto_voltage_value(bits); | |
161 | break; | |
162 | case PCF50633_REGULATOR_DOWN1: | |
163 | millivolts = down_voltage_value(bits); | |
164 | break; | |
165 | case PCF50633_REGULATOR_DOWN2: | |
166 | millivolts = down_voltage_value(bits); | |
167 | break; | |
168 | case PCF50633_REGULATOR_LDO1: | |
169 | case PCF50633_REGULATOR_LDO2: | |
170 | case PCF50633_REGULATOR_LDO3: | |
171 | case PCF50633_REGULATOR_LDO4: | |
172 | case PCF50633_REGULATOR_LDO5: | |
173 | case PCF50633_REGULATOR_LDO6: | |
174 | case PCF50633_REGULATOR_HCLDO: | |
175 | millivolts = ldo_voltage_value(bits); | |
176 | break; | |
177 | default: | |
178 | return -EINVAL; | |
179 | } | |
180 | ||
181 | return millivolts * 1000; | |
182 | } | |
183 | ||
5ec271e7 BR |
184 | static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev) |
185 | { | |
186 | struct pcf50633 *pcf; | |
a6576cff LPC |
187 | int regulator_id; |
188 | u8 volt_bits, regnr; | |
5ec271e7 | 189 | |
561864e8 | 190 | pcf = rdev_get_drvdata(rdev); |
5ec271e7 BR |
191 | |
192 | regulator_id = rdev_get_id(rdev); | |
193 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
194 | return -EINVAL; | |
195 | ||
196 | regnr = pcf50633_regulator_registers[regulator_id]; | |
197 | ||
198 | volt_bits = pcf50633_reg_read(pcf, regnr); | |
a6576cff LPC |
199 | |
200 | return pcf50633_regulator_voltage_value(regulator_id, volt_bits); | |
201 | } | |
202 | ||
203 | static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev, | |
204 | unsigned int index) | |
205 | { | |
206 | struct pcf50633 *pcf; | |
207 | int regulator_id; | |
208 | ||
209 | pcf = rdev_get_drvdata(rdev); | |
210 | ||
211 | regulator_id = rdev_get_id(rdev); | |
5ec271e7 BR |
212 | |
213 | switch (regulator_id) { | |
214 | case PCF50633_REGULATOR_AUTO: | |
a6576cff | 215 | index += 0x2f; |
5ec271e7 | 216 | break; |
5ec271e7 | 217 | case PCF50633_REGULATOR_HCLDO: |
a6576cff | 218 | index += 0x01; |
5ec271e7 BR |
219 | break; |
220 | default: | |
a6576cff | 221 | break; |
5ec271e7 BR |
222 | } |
223 | ||
a6576cff | 224 | return pcf50633_regulator_voltage_value(regulator_id, index); |
5ec271e7 BR |
225 | } |
226 | ||
227 | static int pcf50633_regulator_enable(struct regulator_dev *rdev) | |
228 | { | |
229 | struct pcf50633 *pcf = rdev_get_drvdata(rdev); | |
230 | int regulator_id; | |
231 | u8 regnr; | |
232 | ||
233 | regulator_id = rdev_get_id(rdev); | |
234 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
235 | return -EINVAL; | |
236 | ||
237 | /* The *ENA register is always one after the *OUT register */ | |
238 | regnr = pcf50633_regulator_registers[regulator_id] + 1; | |
239 | ||
240 | return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON, | |
241 | PCF50633_REGULATOR_ON); | |
242 | } | |
243 | ||
244 | static int pcf50633_regulator_disable(struct regulator_dev *rdev) | |
245 | { | |
246 | struct pcf50633 *pcf = rdev_get_drvdata(rdev); | |
247 | int regulator_id; | |
248 | u8 regnr; | |
249 | ||
250 | regulator_id = rdev_get_id(rdev); | |
251 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
252 | return -EINVAL; | |
253 | ||
254 | /* the *ENA register is always one after the *OUT register */ | |
255 | regnr = pcf50633_regulator_registers[regulator_id] + 1; | |
256 | ||
257 | return pcf50633_reg_set_bit_mask(pcf, regnr, | |
258 | PCF50633_REGULATOR_ON, 0); | |
259 | } | |
260 | ||
261 | static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev) | |
262 | { | |
263 | struct pcf50633 *pcf = rdev_get_drvdata(rdev); | |
264 | int regulator_id = rdev_get_id(rdev); | |
265 | u8 regnr; | |
266 | ||
267 | regulator_id = rdev_get_id(rdev); | |
268 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
269 | return -EINVAL; | |
270 | ||
271 | /* the *ENA register is always one after the *OUT register */ | |
272 | regnr = pcf50633_regulator_registers[regulator_id] + 1; | |
273 | ||
274 | return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON; | |
275 | } | |
276 | ||
277 | static struct regulator_ops pcf50633_regulator_ops = { | |
278 | .set_voltage = pcf50633_regulator_set_voltage, | |
279 | .get_voltage = pcf50633_regulator_get_voltage, | |
a6576cff | 280 | .list_voltage = pcf50633_regulator_list_voltage, |
5ec271e7 BR |
281 | .enable = pcf50633_regulator_enable, |
282 | .disable = pcf50633_regulator_disable, | |
283 | .is_enabled = pcf50633_regulator_is_enabled, | |
284 | }; | |
285 | ||
286 | static struct regulator_desc regulators[] = { | |
287 | [PCF50633_REGULATOR_AUTO] = | |
a6576cff | 288 | PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO, 80), |
5ec271e7 | 289 | [PCF50633_REGULATOR_DOWN1] = |
a6576cff | 290 | PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1, 95), |
5ec271e7 | 291 | [PCF50633_REGULATOR_DOWN2] = |
a6576cff | 292 | PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2, 95), |
5ec271e7 | 293 | [PCF50633_REGULATOR_LDO1] = |
a6576cff | 294 | PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1, 27), |
5ec271e7 | 295 | [PCF50633_REGULATOR_LDO2] = |
a6576cff | 296 | PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2, 27), |
5ec271e7 | 297 | [PCF50633_REGULATOR_LDO3] = |
a6576cff | 298 | PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3, 27), |
5ec271e7 | 299 | [PCF50633_REGULATOR_LDO4] = |
a6576cff | 300 | PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4, 27), |
5ec271e7 | 301 | [PCF50633_REGULATOR_LDO5] = |
a6576cff | 302 | PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5, 27), |
5ec271e7 | 303 | [PCF50633_REGULATOR_LDO6] = |
a6576cff | 304 | PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6, 27), |
5ec271e7 | 305 | [PCF50633_REGULATOR_HCLDO] = |
a6576cff | 306 | PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO, 26), |
5ec271e7 | 307 | [PCF50633_REGULATOR_MEMLDO] = |
a6576cff | 308 | PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO, 0), |
5ec271e7 BR |
309 | }; |
310 | ||
311 | static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) | |
312 | { | |
313 | struct regulator_dev *rdev; | |
314 | struct pcf50633 *pcf; | |
315 | ||
316 | /* Already set by core driver */ | |
317 | pcf = platform_get_drvdata(pdev); | |
318 | ||
0527100f MB |
319 | rdev = regulator_register(®ulators[pdev->id], &pdev->dev, |
320 | pdev->dev.platform_data, pcf); | |
5ec271e7 BR |
321 | if (IS_ERR(rdev)) |
322 | return PTR_ERR(rdev); | |
323 | ||
324 | if (pcf->pdata->regulator_registered) | |
325 | pcf->pdata->regulator_registered(pcf, pdev->id); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | static int __devexit pcf50633_regulator_remove(struct platform_device *pdev) | |
331 | { | |
332 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
333 | ||
334 | regulator_unregister(rdev); | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static struct platform_driver pcf50633_regulator_driver = { | |
340 | .driver = { | |
341 | .name = "pcf50633-regltr", | |
342 | }, | |
343 | .probe = pcf50633_regulator_probe, | |
344 | .remove = __devexit_p(pcf50633_regulator_remove), | |
345 | }; | |
346 | ||
347 | static int __init pcf50633_regulator_init(void) | |
348 | { | |
349 | return platform_driver_register(&pcf50633_regulator_driver); | |
350 | } | |
5a1b22be | 351 | subsys_initcall(pcf50633_regulator_init); |
5ec271e7 BR |
352 | |
353 | static void __exit pcf50633_regulator_exit(void) | |
354 | { | |
355 | platform_driver_unregister(&pcf50633_regulator_driver); | |
356 | } | |
357 | module_exit(pcf50633_regulator_exit); | |
358 | ||
359 | MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); | |
360 | MODULE_DESCRIPTION("PCF50633 regulator driver"); | |
361 | MODULE_LICENSE("GPL"); | |
362 | MODULE_ALIAS("platform:pcf50633-regulator"); |