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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 | ||
11bb88ec AL |
27 | #define PCF50633_REGULATOR(_name, _id, _n) \ |
28 | { \ | |
29 | .name = _name, \ | |
30 | .id = PCF50633_REGULATOR_##_id, \ | |
31 | .ops = &pcf50633_regulator_ops, \ | |
32 | .n_voltages = _n, \ | |
33 | .type = REGULATOR_VOLTAGE, \ | |
34 | .owner = THIS_MODULE, \ | |
35 | .enable_reg = PCF50633_REG_##_id##OUT + 1, \ | |
36 | .enable_mask = PCF50633_REGULATOR_ON, \ | |
5ec271e7 BR |
37 | } |
38 | ||
39 | static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = { | |
40 | [PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT, | |
41 | [PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT, | |
42 | [PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT, | |
43 | [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT, | |
44 | [PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT, | |
45 | [PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT, | |
46 | [PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT, | |
47 | [PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT, | |
48 | [PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT, | |
49 | [PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT, | |
50 | [PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT, | |
51 | }; | |
52 | ||
53 | /* Bits from voltage value */ | |
54 | static u8 auto_voltage_bits(unsigned int millivolts) | |
55 | { | |
56 | if (millivolts < 1800) | |
022dcdf0 | 57 | return 0x2f; |
5ec271e7 BR |
58 | if (millivolts > 3800) |
59 | return 0xff; | |
60 | ||
61 | millivolts -= 625; | |
62 | ||
63 | return millivolts / 25; | |
64 | } | |
65 | ||
66 | static u8 down_voltage_bits(unsigned int millivolts) | |
67 | { | |
68 | if (millivolts < 625) | |
69 | return 0; | |
70 | else if (millivolts > 3000) | |
71 | return 0xff; | |
72 | ||
73 | millivolts -= 625; | |
74 | ||
75 | return millivolts / 25; | |
76 | } | |
77 | ||
78 | static u8 ldo_voltage_bits(unsigned int millivolts) | |
79 | { | |
80 | if (millivolts < 900) | |
81 | return 0; | |
82 | else if (millivolts > 3600) | |
83 | return 0x1f; | |
84 | ||
85 | millivolts -= 900; | |
86 | return millivolts / 100; | |
87 | } | |
88 | ||
89 | /* Obtain voltage value from bits */ | |
90 | static unsigned int auto_voltage_value(u8 bits) | |
91 | { | |
022dcdf0 AL |
92 | /* AUTOOUT: 00000000 to 00101110 are reserved. |
93 | * Return 0 for bits in reserved range, which means this selector code | |
94 | * can't be used on this system */ | |
5ec271e7 BR |
95 | if (bits < 0x2f) |
96 | return 0; | |
97 | ||
98 | return 625 + (bits * 25); | |
99 | } | |
100 | ||
101 | ||
102 | static unsigned int down_voltage_value(u8 bits) | |
103 | { | |
104 | return 625 + (bits * 25); | |
105 | } | |
106 | ||
107 | ||
108 | static unsigned int ldo_voltage_value(u8 bits) | |
109 | { | |
110 | bits &= 0x1f; | |
111 | ||
112 | return 900 + (bits * 100); | |
113 | } | |
114 | ||
115 | static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
116 | int min_uV, int max_uV, |
117 | unsigned *selector) | |
5ec271e7 BR |
118 | { |
119 | struct pcf50633 *pcf; | |
120 | int regulator_id, millivolts; | |
121 | u8 volt_bits, regnr; | |
122 | ||
123 | pcf = rdev_get_drvdata(rdev); | |
124 | ||
125 | regulator_id = rdev_get_id(rdev); | |
126 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
127 | return -EINVAL; | |
128 | ||
129 | millivolts = min_uV / 1000; | |
130 | ||
131 | regnr = pcf50633_regulator_registers[regulator_id]; | |
132 | ||
133 | switch (regulator_id) { | |
134 | case PCF50633_REGULATOR_AUTO: | |
135 | volt_bits = auto_voltage_bits(millivolts); | |
136 | break; | |
137 | case PCF50633_REGULATOR_DOWN1: | |
138 | volt_bits = down_voltage_bits(millivolts); | |
139 | break; | |
140 | case PCF50633_REGULATOR_DOWN2: | |
141 | volt_bits = down_voltage_bits(millivolts); | |
142 | break; | |
143 | case PCF50633_REGULATOR_LDO1: | |
144 | case PCF50633_REGULATOR_LDO2: | |
145 | case PCF50633_REGULATOR_LDO3: | |
146 | case PCF50633_REGULATOR_LDO4: | |
147 | case PCF50633_REGULATOR_LDO5: | |
148 | case PCF50633_REGULATOR_LDO6: | |
149 | case PCF50633_REGULATOR_HCLDO: | |
ba51c6c0 | 150 | case PCF50633_REGULATOR_MEMLDO: |
5ec271e7 BR |
151 | volt_bits = ldo_voltage_bits(millivolts); |
152 | break; | |
153 | default: | |
154 | return -EINVAL; | |
155 | } | |
156 | ||
3a93f2a9 MB |
157 | *selector = volt_bits; |
158 | ||
5ec271e7 BR |
159 | return pcf50633_reg_write(pcf, regnr, volt_bits); |
160 | } | |
161 | ||
8300d2fd | 162 | static int pcf50633_regulator_get_voltage_sel(struct regulator_dev *rdev) |
a6576cff | 163 | { |
8300d2fd AL |
164 | struct pcf50633 *pcf; |
165 | int regulator_id; | |
166 | u8 regnr; | |
167 | ||
168 | pcf = rdev_get_drvdata(rdev); | |
169 | ||
170 | regulator_id = rdev_get_id(rdev); | |
171 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
172 | return -EINVAL; | |
173 | ||
174 | regnr = pcf50633_regulator_registers[regulator_id]; | |
175 | ||
176 | return pcf50633_reg_read(pcf, regnr); | |
177 | } | |
178 | ||
179 | static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev, | |
180 | unsigned int index) | |
181 | { | |
182 | int regulator_id = rdev_get_id(rdev); | |
183 | ||
a6576cff LPC |
184 | int millivolts; |
185 | ||
8300d2fd | 186 | switch (regulator_id) { |
a6576cff | 187 | case PCF50633_REGULATOR_AUTO: |
8300d2fd | 188 | millivolts = auto_voltage_value(index); |
a6576cff LPC |
189 | break; |
190 | case PCF50633_REGULATOR_DOWN1: | |
8300d2fd | 191 | millivolts = down_voltage_value(index); |
a6576cff LPC |
192 | break; |
193 | case PCF50633_REGULATOR_DOWN2: | |
8300d2fd | 194 | millivolts = down_voltage_value(index); |
a6576cff LPC |
195 | break; |
196 | case PCF50633_REGULATOR_LDO1: | |
197 | case PCF50633_REGULATOR_LDO2: | |
198 | case PCF50633_REGULATOR_LDO3: | |
199 | case PCF50633_REGULATOR_LDO4: | |
200 | case PCF50633_REGULATOR_LDO5: | |
201 | case PCF50633_REGULATOR_LDO6: | |
202 | case PCF50633_REGULATOR_HCLDO: | |
ba51c6c0 | 203 | case PCF50633_REGULATOR_MEMLDO: |
8300d2fd | 204 | millivolts = ldo_voltage_value(index); |
a6576cff LPC |
205 | break; |
206 | default: | |
207 | return -EINVAL; | |
208 | } | |
209 | ||
210 | return millivolts * 1000; | |
211 | } | |
212 | ||
5ec271e7 BR |
213 | static struct regulator_ops pcf50633_regulator_ops = { |
214 | .set_voltage = pcf50633_regulator_set_voltage, | |
8300d2fd | 215 | .get_voltage_sel = pcf50633_regulator_get_voltage_sel, |
a6576cff | 216 | .list_voltage = pcf50633_regulator_list_voltage, |
11bb88ec AL |
217 | .enable = regulator_enable_regmap, |
218 | .disable = regulator_disable_regmap, | |
219 | .is_enabled = regulator_is_enabled_regmap, | |
5ec271e7 BR |
220 | }; |
221 | ||
2ac2d7d8 | 222 | static const struct regulator_desc regulators[] = { |
11bb88ec AL |
223 | [PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128), |
224 | [PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96), | |
225 | [PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96), | |
226 | [PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28), | |
227 | [PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28), | |
228 | [PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28), | |
229 | [PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28), | |
230 | [PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28), | |
231 | [PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28), | |
232 | [PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28), | |
233 | [PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28), | |
5ec271e7 BR |
234 | }; |
235 | ||
236 | static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) | |
237 | { | |
238 | struct regulator_dev *rdev; | |
239 | struct pcf50633 *pcf; | |
c172708d | 240 | struct regulator_config config = { }; |
5ec271e7 BR |
241 | |
242 | /* Already set by core driver */ | |
98c2e490 | 243 | pcf = dev_to_pcf50633(pdev->dev.parent); |
5ec271e7 | 244 | |
c172708d MB |
245 | config.dev = &pdev->dev; |
246 | config.init_data = pdev->dev.platform_data; | |
247 | config.driver_data = pcf; | |
11bb88ec | 248 | config.regmap = pcf->regmap; |
c172708d MB |
249 | |
250 | rdev = regulator_register(®ulators[pdev->id], &config); | |
5ec271e7 BR |
251 | if (IS_ERR(rdev)) |
252 | return PTR_ERR(rdev); | |
253 | ||
98c2e490 LPC |
254 | platform_set_drvdata(pdev, rdev); |
255 | ||
5ec271e7 BR |
256 | if (pcf->pdata->regulator_registered) |
257 | pcf->pdata->regulator_registered(pcf, pdev->id); | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | static int __devexit pcf50633_regulator_remove(struct platform_device *pdev) | |
263 | { | |
264 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
265 | ||
98c2e490 | 266 | platform_set_drvdata(pdev, NULL); |
5ec271e7 BR |
267 | regulator_unregister(rdev); |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | static struct platform_driver pcf50633_regulator_driver = { | |
273 | .driver = { | |
274 | .name = "pcf50633-regltr", | |
275 | }, | |
276 | .probe = pcf50633_regulator_probe, | |
277 | .remove = __devexit_p(pcf50633_regulator_remove), | |
278 | }; | |
279 | ||
280 | static int __init pcf50633_regulator_init(void) | |
281 | { | |
282 | return platform_driver_register(&pcf50633_regulator_driver); | |
283 | } | |
5a1b22be | 284 | subsys_initcall(pcf50633_regulator_init); |
5ec271e7 BR |
285 | |
286 | static void __exit pcf50633_regulator_exit(void) | |
287 | { | |
288 | platform_driver_unregister(&pcf50633_regulator_driver); | |
289 | } | |
290 | module_exit(pcf50633_regulator_exit); | |
291 | ||
292 | MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); | |
293 | MODULE_DESCRIPTION("PCF50633 regulator driver"); | |
294 | MODULE_LICENSE("GPL"); | |
295 | MODULE_ALIAS("platform:pcf50633-regulator"); |