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Balaji Rao5ec271e2009-01-09 01:51:01 +01001/* 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
Axel Lin11bb88e2012-04-18 10:50:37 +080027#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, \
Axel Lin98667b42012-04-18 10:51:59 +080035 .vsel_reg = PCF50633_REG_##_id##OUT, \
36 .vsel_mask = 0xff, \
Axel Lin11bb88e2012-04-18 10:50:37 +080037 .enable_reg = PCF50633_REG_##_id##OUT + 1, \
38 .enable_mask = PCF50633_REGULATOR_ON, \
Balaji Rao5ec271e2009-01-09 01:51:01 +010039 }
40
Balaji Rao5ec271e2009-01-09 01:51:01 +010041/* Bits from voltage value */
42static u8 auto_voltage_bits(unsigned int millivolts)
43{
44 if (millivolts < 1800)
Axel Lin022dcdf2012-03-19 10:55:24 +080045 return 0x2f;
Balaji Rao5ec271e2009-01-09 01:51:01 +010046 if (millivolts > 3800)
47 return 0xff;
48
49 millivolts -= 625;
50
51 return millivolts / 25;
52}
53
54static 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
66static 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 */
78static unsigned int auto_voltage_value(u8 bits)
79{
Axel Lin022dcdf2012-03-19 10:55:24 +080080 /* 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 */
Balaji Rao5ec271e2009-01-09 01:51:01 +010083 if (bits < 0x2f)
84 return 0;
85
86 return 625 + (bits * 25);
87}
88
89
90static unsigned int down_voltage_value(u8 bits)
91{
92 return 625 + (bits * 25);
93}
94
95
96static unsigned int ldo_voltage_value(u8 bits)
97{
98 bits &= 0x1f;
99
100 return 900 + (bits * 100);
101}
102
Axel Lin368a7882012-06-11 14:43:57 +0800103static int pcf50633_regulator_map_voltage(struct regulator_dev *rdev,
104 int min_uV, int max_uV)
Balaji Rao5ec271e2009-01-09 01:51:01 +0100105{
106 struct pcf50633 *pcf;
107 int regulator_id, millivolts;
Axel Lin368a7882012-06-11 14:43:57 +0800108 u8 volt_bits;
Balaji Rao5ec271e2009-01-09 01:51:01 +0100109
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
Balaji Rao5ec271e2009-01-09 01:51:01 +0100118 switch (regulator_id) {
119 case PCF50633_REGULATOR_AUTO:
120 volt_bits = auto_voltage_bits(millivolts);
121 break;
122 case PCF50633_REGULATOR_DOWN1:
Balaji Rao5ec271e2009-01-09 01:51:01 +0100123 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:
Axel Linba51c6c2012-02-29 12:45:35 +0800133 case PCF50633_REGULATOR_MEMLDO:
Balaji Rao5ec271e2009-01-09 01:51:01 +0100134 volt_bits = ldo_voltage_bits(millivolts);
135 break;
136 default:
137 return -EINVAL;
138 }
139
Axel Lin368a7882012-06-11 14:43:57 +0800140 return volt_bits;
Balaji Rao5ec271e2009-01-09 01:51:01 +0100141}
142
Lars-Peter Clausena6576cf2009-08-04 02:03:52 +0200143static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
144 unsigned int index)
145{
Axel Lin022dcdf2012-03-19 10:55:24 +0800146 int regulator_id = rdev_get_id(rdev);
Balaji Rao5ec271e2009-01-09 01:51:01 +0100147
Axel Lin8300d2f2012-03-19 10:57:06 +0800148 int millivolts;
149
150 switch (regulator_id) {
151 case PCF50633_REGULATOR_AUTO:
152 millivolts = auto_voltage_value(index);
153 break;
154 case PCF50633_REGULATOR_DOWN1:
Axel Lin8300d2f2012-03-19 10:57:06 +0800155 case PCF50633_REGULATOR_DOWN2:
156 millivolts = down_voltage_value(index);
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:
165 case PCF50633_REGULATOR_MEMLDO:
166 millivolts = ldo_voltage_value(index);
167 break;
168 default:
169 return -EINVAL;
170 }
171
172 return millivolts * 1000;
Balaji Rao5ec271e2009-01-09 01:51:01 +0100173}
174
Balaji Rao5ec271e2009-01-09 01:51:01 +0100175static struct regulator_ops pcf50633_regulator_ops = {
Axel Lin368a7882012-06-11 14:43:57 +0800176 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Axel Lin98667b42012-04-18 10:51:59 +0800177 .get_voltage_sel = regulator_get_voltage_sel_regmap,
Lars-Peter Clausena6576cf2009-08-04 02:03:52 +0200178 .list_voltage = pcf50633_regulator_list_voltage,
Axel Lin368a7882012-06-11 14:43:57 +0800179 .map_voltage = pcf50633_regulator_map_voltage,
Axel Lin11bb88e2012-04-18 10:50:37 +0800180 .enable = regulator_enable_regmap,
181 .disable = regulator_disable_regmap,
182 .is_enabled = regulator_is_enabled_regmap,
Balaji Rao5ec271e2009-01-09 01:51:01 +0100183};
184
Axel Lin2ac2d7d2012-04-05 12:02:36 +0800185static const struct regulator_desc regulators[] = {
Axel Lin11bb88e2012-04-18 10:50:37 +0800186 [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),
Balaji Rao5ec271e2009-01-09 01:51:01 +0100197};
198
199static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
200{
201 struct regulator_dev *rdev;
202 struct pcf50633 *pcf;
Mark Brownc1727082012-04-04 00:50:22 +0100203 struct regulator_config config = { };
Balaji Rao5ec271e2009-01-09 01:51:01 +0100204
205 /* Already set by core driver */
Lars-Peter Clausen98c2e492009-10-14 02:12:36 +0400206 pcf = dev_to_pcf50633(pdev->dev.parent);
Balaji Rao5ec271e2009-01-09 01:51:01 +0100207
Mark Brownc1727082012-04-04 00:50:22 +0100208 config.dev = &pdev->dev;
209 config.init_data = pdev->dev.platform_data;
210 config.driver_data = pcf;
Axel Lin11bb88e2012-04-18 10:50:37 +0800211 config.regmap = pcf->regmap;
Mark Brownc1727082012-04-04 00:50:22 +0100212
213 rdev = regulator_register(&regulators[pdev->id], &config);
Balaji Rao5ec271e2009-01-09 01:51:01 +0100214 if (IS_ERR(rdev))
215 return PTR_ERR(rdev);
216
Lars-Peter Clausen98c2e492009-10-14 02:12:36 +0400217 platform_set_drvdata(pdev, rdev);
218
Balaji Rao5ec271e2009-01-09 01:51:01 +0100219 if (pcf->pdata->regulator_registered)
220 pcf->pdata->regulator_registered(pcf, pdev->id);
221
222 return 0;
223}
224
225static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
226{
227 struct regulator_dev *rdev = platform_get_drvdata(pdev);
228
Lars-Peter Clausen98c2e492009-10-14 02:12:36 +0400229 platform_set_drvdata(pdev, NULL);
Balaji Rao5ec271e2009-01-09 01:51:01 +0100230 regulator_unregister(rdev);
231
232 return 0;
233}
234
235static 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
243static int __init pcf50633_regulator_init(void)
244{
245 return platform_driver_register(&pcf50633_regulator_driver);
246}
Mark Brown5a1b22b2009-04-27 18:21:18 +0100247subsys_initcall(pcf50633_regulator_init);
Balaji Rao5ec271e2009-01-09 01:51:01 +0100248
249static void __exit pcf50633_regulator_exit(void)
250{
251 platform_driver_unregister(&pcf50633_regulator_driver);
252}
253module_exit(pcf50633_regulator_exit);
254
255MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
256MODULE_DESCRIPTION("PCF50633 regulator driver");
257MODULE_LICENSE("GPL");
258MODULE_ALIAS("platform:pcf50633-regulator");