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-rw-r--r--drivers/mfd/88pm8607.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/drivers/mfd/88pm8607.c b/drivers/mfd/88pm8607.c
new file mode 100644
index 000000000000..7e3f65907993
--- /dev/null
+++ b/drivers/mfd/88pm8607.c
@@ -0,0 +1,302 @@
1/*
2 * Base driver for Marvell 88PM8607
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
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/platform_device.h>
16#include <linux/i2c.h>
17#include <linux/mfd/core.h>
18#include <linux/mfd/88pm8607.h>
19
20
21#define PM8607_REG_RESOURCE(_start, _end) \
22{ \
23 .start = PM8607_##_start, \
24 .end = PM8607_##_end, \
25 .flags = IORESOURCE_IO, \
26}
27
28static struct resource pm8607_regulator_resources[] = {
29 PM8607_REG_RESOURCE(BUCK1, BUCK1),
30 PM8607_REG_RESOURCE(BUCK2, BUCK2),
31 PM8607_REG_RESOURCE(BUCK3, BUCK3),
32 PM8607_REG_RESOURCE(LDO1, LDO1),
33 PM8607_REG_RESOURCE(LDO2, LDO2),
34 PM8607_REG_RESOURCE(LDO3, LDO3),
35 PM8607_REG_RESOURCE(LDO4, LDO4),
36 PM8607_REG_RESOURCE(LDO5, LDO5),
37 PM8607_REG_RESOURCE(LDO6, LDO6),
38 PM8607_REG_RESOURCE(LDO7, LDO7),
39 PM8607_REG_RESOURCE(LDO8, LDO8),
40 PM8607_REG_RESOURCE(LDO9, LDO9),
41 PM8607_REG_RESOURCE(LDO10, LDO10),
42 PM8607_REG_RESOURCE(LDO12, LDO12),
43 PM8607_REG_RESOURCE(LDO14, LDO14),
44};
45
46#define PM8607_REG_DEVS(_name, _id) \
47{ \
48 .name = "88pm8607-" #_name, \
49 .num_resources = 1, \
50 .resources = &pm8607_regulator_resources[PM8607_ID_##_id], \
51}
52
53static struct mfd_cell pm8607_devs[] = {
54 PM8607_REG_DEVS(buck1, BUCK1),
55 PM8607_REG_DEVS(buck2, BUCK2),
56 PM8607_REG_DEVS(buck3, BUCK3),
57 PM8607_REG_DEVS(ldo1, LDO1),
58 PM8607_REG_DEVS(ldo2, LDO2),
59 PM8607_REG_DEVS(ldo3, LDO3),
60 PM8607_REG_DEVS(ldo4, LDO4),
61 PM8607_REG_DEVS(ldo5, LDO5),
62 PM8607_REG_DEVS(ldo6, LDO6),
63 PM8607_REG_DEVS(ldo7, LDO7),
64 PM8607_REG_DEVS(ldo8, LDO8),
65 PM8607_REG_DEVS(ldo9, LDO9),
66 PM8607_REG_DEVS(ldo10, LDO10),
67 PM8607_REG_DEVS(ldo12, LDO12),
68 PM8607_REG_DEVS(ldo14, LDO14),
69};
70
71static inline int pm8607_read_device(struct pm8607_chip *chip,
72 int reg, int bytes, void *dest)
73{
74 struct i2c_client *i2c = chip->client;
75 unsigned char data;
76 int ret;
77
78 data = (unsigned char)reg;
79 ret = i2c_master_send(i2c, &data, 1);
80 if (ret < 0)
81 return ret;
82
83 ret = i2c_master_recv(i2c, dest, bytes);
84 if (ret < 0)
85 return ret;
86 return 0;
87}
88
89static inline int pm8607_write_device(struct pm8607_chip *chip,
90 int reg, int bytes, void *src)
91{
92 struct i2c_client *i2c = chip->client;
93 unsigned char buf[bytes + 1];
94 int ret;
95
96 buf[0] = (unsigned char)reg;
97 memcpy(&buf[1], src, bytes);
98
99 ret = i2c_master_send(i2c, buf, bytes + 1);
100 if (ret < 0)
101 return ret;
102 return 0;
103}
104
105int pm8607_reg_read(struct pm8607_chip *chip, int reg)
106{
107 unsigned char data;
108 int ret;
109
110 mutex_lock(&chip->io_lock);
111 ret = chip->read(chip, reg, 1, &data);
112 mutex_unlock(&chip->io_lock);
113
114 if (ret < 0)
115 return ret;
116 else
117 return (int)data;
118}
119EXPORT_SYMBOL(pm8607_reg_read);
120
121int pm8607_reg_write(struct pm8607_chip *chip, int reg,
122 unsigned char data)
123{
124 int ret;
125
126 mutex_lock(&chip->io_lock);
127 ret = chip->write(chip, reg, 1, &data);
128 mutex_unlock(&chip->io_lock);
129
130 return ret;
131}
132EXPORT_SYMBOL(pm8607_reg_write);
133
134int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
135 int count, unsigned char *buf)
136{
137 int ret;
138
139 mutex_lock(&chip->io_lock);
140 ret = chip->read(chip, reg, count, buf);
141 mutex_unlock(&chip->io_lock);
142
143 return ret;
144}
145EXPORT_SYMBOL(pm8607_bulk_read);
146
147int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
148 int count, unsigned char *buf)
149{
150 int ret;
151
152 mutex_lock(&chip->io_lock);
153 ret = chip->write(chip, reg, count, buf);
154 mutex_unlock(&chip->io_lock);
155
156 return ret;
157}
158EXPORT_SYMBOL(pm8607_bulk_write);
159
160int pm8607_set_bits(struct pm8607_chip *chip, int reg,
161 unsigned char mask, unsigned char data)
162{
163 unsigned char value;
164 int ret;
165
166 mutex_lock(&chip->io_lock);
167 ret = chip->read(chip, reg, 1, &value);
168 if (ret < 0)
169 goto out;
170 value &= ~mask;
171 value |= data;
172 ret = chip->write(chip, reg, 1, &value);
173out:
174 mutex_unlock(&chip->io_lock);
175 return ret;
176}
177EXPORT_SYMBOL(pm8607_set_bits);
178
179
180static const struct i2c_device_id pm8607_id_table[] = {
181 { "88PM8607", 0 },
182 {}
183};
184MODULE_DEVICE_TABLE(i2c, pm8607_id_table);
185
186
187static int __devinit pm8607_probe(struct i2c_client *client,
188 const struct i2c_device_id *id)
189{
190 struct pm8607_platform_data *pdata = client->dev.platform_data;
191 struct pm8607_chip *chip;
192 int i, count;
193 int ret;
194
195 chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
196 if (chip == NULL)
197 return -ENOMEM;
198
199 chip->client = client;
200 chip->dev = &client->dev;
201 chip->read = pm8607_read_device;
202 chip->write = pm8607_write_device;
203 i2c_set_clientdata(client, chip);
204
205 mutex_init(&chip->io_lock);
206 dev_set_drvdata(chip->dev, chip);
207
208 ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
209 if (ret < 0) {
210 dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
211 goto out;
212 }
213 if ((ret & CHIP_ID_MASK) == CHIP_ID)
214 dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
215 ret);
216 else {
217 dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
218 "Chip ID: %02x\n", ret);
219 goto out;
220 }
221 chip->chip_id = ret;
222
223 ret = pm8607_reg_read(chip, PM8607_BUCK3);
224 if (ret < 0) {
225 dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
226 goto out;
227 }
228 if (ret & PM8607_BUCK3_DOUBLE)
229 chip->buck3_double = 1;
230
231 ret = pm8607_reg_read(chip, PM8607_MISC1);
232 if (ret < 0) {
233 dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
234 goto out;
235 }
236 if (pdata->i2c_port == PI2C_PORT)
237 ret |= PM8607_MISC1_PI2C;
238 else
239 ret &= ~PM8607_MISC1_PI2C;
240 ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
241 if (ret < 0) {
242 dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
243 goto out;
244 }
245
246
247 count = ARRAY_SIZE(pm8607_devs);
248 for (i = 0; i < count; i++) {
249 ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
250 1, NULL, 0);
251 if (ret != 0) {
252 dev_err(chip->dev, "Failed to add subdevs\n");
253 goto out;
254 }
255 }
256
257 return 0;
258
259out:
260 i2c_set_clientdata(client, NULL);
261 kfree(chip);
262 return ret;
263}
264
265static int __devexit pm8607_remove(struct i2c_client *client)
266{
267 struct pm8607_chip *chip = i2c_get_clientdata(client);
268
269 mfd_remove_devices(chip->dev);
270 kfree(chip);
271 return 0;
272}
273
274static struct i2c_driver pm8607_driver = {
275 .driver = {
276 .name = "88PM8607",
277 .owner = THIS_MODULE,
278 },
279 .probe = pm8607_probe,
280 .remove = __devexit_p(pm8607_remove),
281 .id_table = pm8607_id_table,
282};
283
284static int __init pm8607_init(void)
285{
286 int ret;
287 ret = i2c_add_driver(&pm8607_driver);
288 if (ret != 0)
289 pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
290 return ret;
291}
292subsys_initcall(pm8607_init);
293
294static void __exit pm8607_exit(void)
295{
296 i2c_del_driver(&pm8607_driver);
297}
298module_exit(pm8607_exit);
299
300MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
301MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
302MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 02:52:01 -0500