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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, \ | |
98667b43 AL |
35 | .vsel_reg = PCF50633_REG_##_id##OUT, \ |
36 | .vsel_mask = 0xff, \ | |
11bb88ec AL |
37 | .enable_reg = PCF50633_REG_##_id##OUT + 1, \ |
38 | .enable_mask = PCF50633_REGULATOR_ON, \ | |
5ec271e7 BR |
39 | } |
40 | ||
5ec271e7 BR |
41 | /* Bits from voltage value */ |
42 | static u8 auto_voltage_bits(unsigned int millivolts) | |
43 | { | |
44 | if (millivolts < 1800) | |
022dcdf0 | 45 | return 0x2f; |
5ec271e7 BR |
46 | if (millivolts > 3800) |
47 | return 0xff; | |
48 | ||
49 | millivolts -= 625; | |
50 | ||
51 | return millivolts / 25; | |
52 | } | |
53 | ||
54 | static u8 down_voltage_bits(unsigned int millivolts) | |
55 | { | |
56 | if (millivolts < 625) | |
57 | return 0; | |
58 | else if (millivolts > 3000) | |
59 | return 0xff; | |
60 | ||
61 | millivolts -= 625; | |
62 | ||
63 | return millivolts / 25; | |
64 | } | |
65 | ||
66 | static u8 ldo_voltage_bits(unsigned int millivolts) | |
67 | { | |
68 | if (millivolts < 900) | |
69 | return 0; | |
70 | else if (millivolts > 3600) | |
71 | return 0x1f; | |
72 | ||
73 | millivolts -= 900; | |
74 | return millivolts / 100; | |
75 | } | |
76 | ||
77 | /* Obtain voltage value from bits */ | |
78 | static unsigned int auto_voltage_value(u8 bits) | |
79 | { | |
022dcdf0 AL |
80 | /* AUTOOUT: 00000000 to 00101110 are reserved. |
81 | * Return 0 for bits in reserved range, which means this selector code | |
82 | * can't be used on this system */ | |
5ec271e7 BR |
83 | if (bits < 0x2f) |
84 | return 0; | |
85 | ||
86 | return 625 + (bits * 25); | |
87 | } | |
88 | ||
89 | ||
90 | static unsigned int down_voltage_value(u8 bits) | |
91 | { | |
92 | return 625 + (bits * 25); | |
93 | } | |
94 | ||
95 | ||
96 | static unsigned int ldo_voltage_value(u8 bits) | |
97 | { | |
98 | bits &= 0x1f; | |
99 | ||
100 | return 900 + (bits * 100); | |
101 | } | |
102 | ||
368a7887 AL |
103 | static int pcf50633_regulator_map_voltage(struct regulator_dev *rdev, |
104 | int min_uV, int max_uV) | |
5ec271e7 BR |
105 | { |
106 | struct pcf50633 *pcf; | |
107 | int regulator_id, millivolts; | |
368a7887 | 108 | u8 volt_bits; |
5ec271e7 BR |
109 | |
110 | pcf = rdev_get_drvdata(rdev); | |
111 | ||
112 | regulator_id = rdev_get_id(rdev); | |
113 | if (regulator_id >= PCF50633_NUM_REGULATORS) | |
114 | return -EINVAL; | |
115 | ||
116 | millivolts = min_uV / 1000; | |
117 | ||
5ec271e7 BR |
118 | switch (regulator_id) { |
119 | case PCF50633_REGULATOR_AUTO: | |
120 | volt_bits = auto_voltage_bits(millivolts); | |
121 | break; | |
122 | case PCF50633_REGULATOR_DOWN1: | |
5ec271e7 BR |
123 | case PCF50633_REGULATOR_DOWN2: |
124 | volt_bits = down_voltage_bits(millivolts); | |
125 | break; | |
126 | case PCF50633_REGULATOR_LDO1: | |
127 | case PCF50633_REGULATOR_LDO2: | |
128 | case PCF50633_REGULATOR_LDO3: | |
129 | case PCF50633_REGULATOR_LDO4: | |
130 | case PCF50633_REGULATOR_LDO5: | |
131 | case PCF50633_REGULATOR_LDO6: | |
132 | case PCF50633_REGULATOR_HCLDO: | |
ba51c6c0 | 133 | case PCF50633_REGULATOR_MEMLDO: |
5ec271e7 BR |
134 | volt_bits = ldo_voltage_bits(millivolts); |
135 | break; | |
136 | default: | |
137 | return -EINVAL; | |
138 | } | |
139 | ||
368a7887 | 140 | return volt_bits; |
5ec271e7 BR |
141 | } |
142 | ||
8300d2fd AL |
143 | static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev, |
144 | unsigned int index) | |
145 | { | |
146 | int regulator_id = rdev_get_id(rdev); | |
147 | ||
a6576cff LPC |
148 | int millivolts; |
149 | ||
8300d2fd | 150 | switch (regulator_id) { |
a6576cff | 151 | case PCF50633_REGULATOR_AUTO: |
8300d2fd | 152 | millivolts = auto_voltage_value(index); |
a6576cff LPC |
153 | break; |
154 | case PCF50633_REGULATOR_DOWN1: | |
a6576cff | 155 | case PCF50633_REGULATOR_DOWN2: |
8300d2fd | 156 | millivolts = down_voltage_value(index); |
a6576cff LPC |
157 | break; |
158 | case PCF50633_REGULATOR_LDO1: | |
159 | case PCF50633_REGULATOR_LDO2: | |
160 | case PCF50633_REGULATOR_LDO3: | |
161 | case PCF50633_REGULATOR_LDO4: | |
162 | case PCF50633_REGULATOR_LDO5: | |
163 | case PCF50633_REGULATOR_LDO6: | |
164 | case PCF50633_REGULATOR_HCLDO: | |
ba51c6c0 | 165 | case PCF50633_REGULATOR_MEMLDO: |
8300d2fd | 166 | millivolts = ldo_voltage_value(index); |
a6576cff LPC |
167 | break; |
168 | default: | |
169 | return -EINVAL; | |
170 | } | |
171 | ||
172 | return millivolts * 1000; | |
173 | } | |
174 | ||
5ec271e7 | 175 | static struct regulator_ops pcf50633_regulator_ops = { |
368a7887 | 176 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
98667b43 | 177 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
a6576cff | 178 | .list_voltage = pcf50633_regulator_list_voltage, |
368a7887 | 179 | .map_voltage = pcf50633_regulator_map_voltage, |
11bb88ec AL |
180 | .enable = regulator_enable_regmap, |
181 | .disable = regulator_disable_regmap, | |
182 | .is_enabled = regulator_is_enabled_regmap, | |
5ec271e7 BR |
183 | }; |
184 | ||
2ac2d7d8 | 185 | static const struct regulator_desc regulators[] = { |
11bb88ec AL |
186 | [PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128), |
187 | [PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96), | |
188 | [PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96), | |
189 | [PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28), | |
190 | [PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28), | |
191 | [PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28), | |
192 | [PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28), | |
193 | [PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28), | |
194 | [PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28), | |
195 | [PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28), | |
196 | [PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28), | |
5ec271e7 BR |
197 | }; |
198 | ||
199 | static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) | |
200 | { | |
201 | struct regulator_dev *rdev; | |
202 | struct pcf50633 *pcf; | |
c172708d | 203 | struct regulator_config config = { }; |
5ec271e7 BR |
204 | |
205 | /* Already set by core driver */ | |
98c2e490 | 206 | pcf = dev_to_pcf50633(pdev->dev.parent); |
5ec271e7 | 207 | |
c172708d MB |
208 | config.dev = &pdev->dev; |
209 | config.init_data = pdev->dev.platform_data; | |
210 | config.driver_data = pcf; | |
11bb88ec | 211 | config.regmap = pcf->regmap; |
c172708d MB |
212 | |
213 | rdev = regulator_register(®ulators[pdev->id], &config); | |
5ec271e7 BR |
214 | if (IS_ERR(rdev)) |
215 | return PTR_ERR(rdev); | |
216 | ||
98c2e490 LPC |
217 | platform_set_drvdata(pdev, rdev); |
218 | ||
5ec271e7 BR |
219 | if (pcf->pdata->regulator_registered) |
220 | pcf->pdata->regulator_registered(pcf, pdev->id); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static int __devexit pcf50633_regulator_remove(struct platform_device *pdev) | |
226 | { | |
227 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
228 | ||
98c2e490 | 229 | platform_set_drvdata(pdev, NULL); |
5ec271e7 BR |
230 | regulator_unregister(rdev); |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | static struct platform_driver pcf50633_regulator_driver = { | |
236 | .driver = { | |
237 | .name = "pcf50633-regltr", | |
238 | }, | |
239 | .probe = pcf50633_regulator_probe, | |
240 | .remove = __devexit_p(pcf50633_regulator_remove), | |
241 | }; | |
242 | ||
243 | static int __init pcf50633_regulator_init(void) | |
244 | { | |
245 | return platform_driver_register(&pcf50633_regulator_driver); | |
246 | } | |
5a1b22be | 247 | subsys_initcall(pcf50633_regulator_init); |
5ec271e7 BR |
248 | |
249 | static void __exit pcf50633_regulator_exit(void) | |
250 | { | |
251 | platform_driver_unregister(&pcf50633_regulator_driver); | |
252 | } | |
253 | module_exit(pcf50633_regulator_exit); | |
254 | ||
255 | MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); | |
256 | MODULE_DESCRIPTION("PCF50633 regulator driver"); | |
257 | MODULE_LICENSE("GPL"); | |
258 | MODULE_ALIAS("platform:pcf50633-regulator"); |