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-rw-r--r--drivers/regulator/Kconfig6
-rw-r--r--drivers/regulator/Makefile1
-rw-r--r--drivers/regulator/max8925-regulator.c306
3 files changed, 313 insertions, 0 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index dbfe31a4a519..04f2e085116a 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -94,6 +94,12 @@ config REGULATOR_MAX8660
94 This driver controls a Maxim 8660/8661 voltage output 94 This driver controls a Maxim 8660/8661 voltage output
95 regulator via I2C bus. 95 regulator via I2C bus.
96 96
97config REGULATOR_MAX8925
98 tristate "Maxim MAX8925 Power Management IC"
99 depends on MFD_MAX8925
100 help
101 Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC.
102
97config REGULATOR_TWL4030 103config REGULATOR_TWL4030
98 bool "TI TWL4030/TWL5030/TWL6030/TPS695x0 PMIC" 104 bool "TI TWL4030/TWL5030/TWL6030/TPS695x0 PMIC"
99 depends on TWL4030_CORE 105 depends on TWL4030_CORE
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index e845b66ad59c..4e7feece22d5 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
15obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o 15obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
16obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o 16obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
17obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o 17obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
18obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
18obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o 19obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
19obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o 20obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
20obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o 21obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
diff --git a/drivers/regulator/max8925-regulator.c b/drivers/regulator/max8925-regulator.c
new file mode 100644
index 000000000000..67873f08ed40
--- /dev/null
+++ b/drivers/regulator/max8925-regulator.c
@@ -0,0 +1,306 @@
1/*
2 * Regulators driver for Maxim max8925
3 *
4 * Copyright (C) 2009 Marvell International Ltd.
5 * Haojian Zhuang <haojian.zhuang@marvell.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/platform_device.h>
16#include <linux/regulator/driver.h>
17#include <linux/regulator/machine.h>
18#include <linux/mfd/max8925.h>
19
20#define SD1_DVM_VMIN 850000
21#define SD1_DVM_VMAX 1000000
22#define SD1_DVM_STEP 50000
23#define SD1_DVM_SHIFT 5 /* SDCTL1 bit5 */
24#define SD1_DVM_EN 6 /* SDV1 bit 6 */
25
26struct max8925_regulator_info {
27 struct regulator_desc desc;
28 struct regulator_dev *regulator;
29 struct i2c_client *i2c;
30 struct max8925_chip *chip;
31
32 int min_uV;
33 int max_uV;
34 int step_uV;
35 int vol_reg;
36 int vol_shift;
37 int vol_nbits;
38 int enable_bit;
39 int enable_reg;
40};
41
42static inline int check_range(struct max8925_regulator_info *info,
43 int min_uV, int max_uV)
44{
45 if (min_uV < info->min_uV || min_uV > info->max_uV)
46 return -EINVAL;
47
48 return 0;
49}
50
51static int max8925_list_voltage(struct regulator_dev *rdev, unsigned index)
52{
53 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
54 return info->min_uV + index * info->step_uV;
55}
56
57static int max8925_set_voltage(struct regulator_dev *rdev,
58 int min_uV, int max_uV)
59{
60 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
61 unsigned char data, mask;
62
63 if (check_range(info, min_uV, max_uV)) {
64 dev_err(info->chip->dev, "invalid voltage range (%d, %d) uV\n",
65 min_uV, max_uV);
66 return -EINVAL;
67 }
68 data = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
69 data <<= info->vol_shift;
70 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
71
72 return max8925_set_bits(info->i2c, info->vol_reg, mask, data);
73}
74
75static int max8925_get_voltage(struct regulator_dev *rdev)
76{
77 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
78 unsigned char data, mask;
79 int ret;
80
81 ret = max8925_reg_read(info->i2c, info->vol_reg);
82 if (ret < 0)
83 return ret;
84 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
85 data = (ret & mask) >> info->vol_shift;
86
87 return max8925_list_voltage(rdev, data);
88}
89
90static int max8925_enable(struct regulator_dev *rdev)
91{
92 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
93
94 return max8925_set_bits(info->i2c, info->enable_reg,
95 1 << info->enable_bit,
96 1 << info->enable_bit);
97}
98
99static int max8925_disable(struct regulator_dev *rdev)
100{
101 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
102
103 return max8925_set_bits(info->i2c, info->enable_reg,
104 1 << info->enable_bit, 0);
105}
106
107static int max8925_is_enabled(struct regulator_dev *rdev)
108{
109 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
110 int ret;
111
112 ret = max8925_reg_read(info->i2c, info->vol_reg);
113 if (ret < 0)
114 return ret;
115
116 return ret & (1 << info->enable_bit);
117}
118
119static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
120{
121 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
122 unsigned char data, mask;
123
124 if (uV < SD1_DVM_VMIN || uV > SD1_DVM_VMAX)
125 return -EINVAL;
126
127 data = (uV - SD1_DVM_VMIN + SD1_DVM_STEP - 1) / SD1_DVM_STEP;
128 data <<= SD1_DVM_SHIFT;
129 mask = 3 << SD1_DVM_SHIFT;
130
131 return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
132}
133
134static int max8925_set_dvm_enable(struct regulator_dev *rdev)
135{
136 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
137
138 return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
139 1 << SD1_DVM_EN);
140}
141
142static int max8925_set_dvm_disable(struct regulator_dev *rdev)
143{
144 struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
145
146 return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
147}
148
149static struct regulator_ops max8925_regulator_sdv_ops = {
150 .set_voltage = max8925_set_voltage,
151 .get_voltage = max8925_get_voltage,
152 .enable = max8925_enable,
153 .disable = max8925_disable,
154 .is_enabled = max8925_is_enabled,
155 .set_suspend_voltage = max8925_set_dvm_voltage,
156 .set_suspend_enable = max8925_set_dvm_enable,
157 .set_suspend_disable = max8925_set_dvm_disable,
158};
159
160static struct regulator_ops max8925_regulator_ldo_ops = {
161 .set_voltage = max8925_set_voltage,
162 .get_voltage = max8925_get_voltage,
163 .enable = max8925_enable,
164 .disable = max8925_disable,
165 .is_enabled = max8925_is_enabled,
166};
167
168#define MAX8925_SDV(_id, min, max, step) \
169{ \
170 .desc = { \
171 .name = "SDV" #_id, \
172 .ops = &max8925_regulator_sdv_ops, \
173 .type = REGULATOR_VOLTAGE, \
174 .id = MAX8925_ID_SD##_id, \
175 .owner = THIS_MODULE, \
176 }, \
177 .min_uV = min * 1000, \
178 .max_uV = max * 1000, \
179 .step_uV = step * 1000, \
180 .vol_reg = MAX8925_SDV##_id, \
181 .vol_shift = 0, \
182 .vol_nbits = 6, \
183 .enable_reg = MAX8925_SDCTL##_id, \
184 .enable_bit = 0, \
185}
186
187#define MAX8925_LDO(_id, min, max, step) \
188{ \
189 .desc = { \
190 .name = "LDO" #_id, \
191 .ops = &max8925_regulator_ldo_ops, \
192 .type = REGULATOR_VOLTAGE, \
193 .id = MAX8925_ID_LDO##_id, \
194 .owner = THIS_MODULE, \
195 }, \
196 .min_uV = min * 1000, \
197 .max_uV = max * 1000, \
198 .step_uV = step * 1000, \
199 .vol_reg = MAX8925_LDOVOUT##_id, \
200 .vol_shift = 0, \
201 .vol_nbits = 6, \
202 .enable_reg = MAX8925_LDOCTL##_id, \
203 .enable_bit = 0, \
204}
205
206static struct max8925_regulator_info max8925_regulator_info[] = {
207 MAX8925_SDV(1, 637.5, 1425, 12.5),
208 MAX8925_SDV(2, 650, 2225, 25),
209 MAX8925_SDV(3, 750, 3900, 50),
210
211 MAX8925_LDO(1, 750, 3900, 50),
212 MAX8925_LDO(2, 650, 2250, 25),
213 MAX8925_LDO(3, 650, 2250, 25),
214 MAX8925_LDO(4, 750, 3900, 50),
215 MAX8925_LDO(5, 750, 3900, 50),
216 MAX8925_LDO(6, 750, 3900, 50),
217 MAX8925_LDO(7, 750, 3900, 50),
218 MAX8925_LDO(8, 750, 3900, 50),
219 MAX8925_LDO(9, 750, 3900, 50),
220 MAX8925_LDO(10, 750, 3900, 50),
221 MAX8925_LDO(11, 750, 3900, 50),
222 MAX8925_LDO(12, 750, 3900, 50),
223 MAX8925_LDO(13, 750, 3900, 50),
224 MAX8925_LDO(14, 750, 3900, 50),
225 MAX8925_LDO(15, 750, 3900, 50),
226 MAX8925_LDO(16, 750, 3900, 50),
227 MAX8925_LDO(17, 650, 2250, 25),
228 MAX8925_LDO(18, 650, 2250, 25),
229 MAX8925_LDO(19, 750, 3900, 50),
230 MAX8925_LDO(20, 750, 3900, 50),
231};
232
233static inline struct max8925_regulator_info *find_regulator_info(int id)
234{
235 struct max8925_regulator_info *ri;
236 int i;
237
238 for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
239 ri = &max8925_regulator_info[i];
240 if (ri->desc.id == id)
241 return ri;
242 }
243 return NULL;
244}
245
246static int __devinit max8925_regulator_probe(struct platform_device *pdev)
247{
248 struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
249 struct max8925_platform_data *pdata = chip->dev->platform_data;
250 struct max8925_regulator_info *ri = NULL;
251 struct regulator_dev *rdev;
252
253 ri = find_regulator_info(pdev->id);
254 if (ri == NULL) {
255 dev_err(&pdev->dev, "invalid regulator ID specified\n");
256 return -EINVAL;
257 }
258 ri->i2c = chip->i2c;
259 ri->chip = chip;
260
261 rdev = regulator_register(&ri->desc, &pdev->dev,
262 pdata->regulator[pdev->id], ri);
263 if (IS_ERR(rdev)) {
264 dev_err(&pdev->dev, "failed to register regulator %s\n",
265 ri->desc.name);
266 return PTR_ERR(rdev);
267 }
268
269 platform_set_drvdata(pdev, rdev);
270 return 0;
271}
272
273static int __devexit max8925_regulator_remove(struct platform_device *pdev)
274{
275 struct regulator_dev *rdev = platform_get_drvdata(pdev);
276
277 regulator_unregister(rdev);
278 return 0;
279}
280
281static struct platform_driver max8925_regulator_driver = {
282 .driver = {
283 .name = "max8925-regulator",
284 .owner = THIS_MODULE,
285 },
286 .probe = max8925_regulator_probe,
287 .remove = __devexit_p(max8925_regulator_remove),
288};
289
290static int __init max8925_regulator_init(void)
291{
292 return platform_driver_register(&max8925_regulator_driver);
293}
294subsys_initcall(max8925_regulator_init);
295
296static void __exit max8925_regulator_exit(void)
297{
298 platform_driver_unregister(&max8925_regulator_driver);
299}
300module_exit(max8925_regulator_exit);
301
302MODULE_LICENSE("GPL");
303MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
304MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
305MODULE_ALIAS("platform:max8925-regulator");
306
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 05:19:20 -0500