summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/88pm8607.c
blob: 7e3f65907993e111410b816d1bca5a2b1911750f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
/*
 * Base driver for Marvell 88PM8607
 *
 * Copyright (C) 2009 Marvell International Ltd.
 * 	Haojian Zhuang <haojian.zhuang@marvell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm8607.h>


#define PM8607_REG_RESOURCE(_start, _end)		\
{							\
	.start	= PM8607_##_start,			\
	.end	= PM8607_##_end,			\
	.flags	= IORESOURCE_IO,			\
}

static struct resource pm8607_regulator_resources[] = {
	PM8607_REG_RESOURCE(BUCK1, BUCK1),
	PM8607_REG_RESOURCE(BUCK2, BUCK2),
	PM8607_REG_RESOURCE(BUCK3, BUCK3),
	PM8607_REG_RESOURCE(LDO1,  LDO1),
	PM8607_REG_RESOURCE(LDO2,  LDO2),
	PM8607_REG_RESOURCE(LDO3,  LDO3),
	PM8607_REG_RESOURCE(LDO4,  LDO4),
	PM8607_REG_RESOURCE(LDO5,  LDO5),
	PM8607_REG_RESOURCE(LDO6,  LDO6),
	PM8607_REG_RESOURCE(LDO7,  LDO7),
	PM8607_REG_RESOURCE(LDO8,  LDO8),
	PM8607_REG_RESOURCE(LDO9,  LDO9),
	PM8607_REG_RESOURCE(LDO10, LDO10),
	PM8607_REG_RESOURCE(LDO12, LDO12),
	PM8607_REG_RESOURCE(LDO14, LDO14),
};

#define PM8607_REG_DEVS(_name, _id)					\
{									\
	.name		= "88pm8607-" #_name,				\
	.num_resources	= 1,						\
	.resources	= &pm8607_regulator_resources[PM8607_ID_##_id],	\
}

static struct mfd_cell pm8607_devs[] = {
	PM8607_REG_DEVS(buck1, BUCK1),
	PM8607_REG_DEVS(buck2, BUCK2),
	PM8607_REG_DEVS(buck3, BUCK3),
	PM8607_REG_DEVS(ldo1,  LDO1),
	PM8607_REG_DEVS(ldo2,  LDO2),
	PM8607_REG_DEVS(ldo3,  LDO3),
	PM8607_REG_DEVS(ldo4,  LDO4),
	PM8607_REG_DEVS(ldo5,  LDO5),
	PM8607_REG_DEVS(ldo6,  LDO6),
	PM8607_REG_DEVS(ldo7,  LDO7),
	PM8607_REG_DEVS(ldo8,  LDO8),
	PM8607_REG_DEVS(ldo9,  LDO9),
	PM8607_REG_DEVS(ldo10, LDO10),
	PM8607_REG_DEVS(ldo12, LDO12),
	PM8607_REG_DEVS(ldo14, LDO14),
};

static inline int pm8607_read_device(struct pm8607_chip *chip,
				     int reg, int bytes, void *dest)
{
	struct i2c_client *i2c = chip->client;
	unsigned char data;
	int ret;

	data = (unsigned char)reg;
	ret = i2c_master_send(i2c, &data, 1);
	if (ret < 0)
		return ret;

	ret = i2c_master_recv(i2c, dest, bytes);
	if (ret < 0)
		return ret;
	return 0;
}

static inline int pm8607_write_device(struct pm8607_chip *chip,
				      int reg, int bytes, void *src)
{
	struct i2c_client *i2c = chip->client;
	unsigned char buf[bytes + 1];
	int ret;

	buf[0] = (unsigned char)reg;
	memcpy(&buf[1], src, bytes);

	ret = i2c_master_send(i2c, buf, bytes + 1);
	if (ret < 0)
		return ret;
	return 0;
}

int pm8607_reg_read(struct pm8607_chip *chip, int reg)
{
	unsigned char data;
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, 1, &data);
	mutex_unlock(&chip->io_lock);

	if (ret < 0)
		return ret;
	else
		return (int)data;
}
EXPORT_SYMBOL(pm8607_reg_read);

int pm8607_reg_write(struct pm8607_chip *chip, int reg,
		     unsigned char data)
{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->write(chip, reg, 1, &data);
	mutex_unlock(&chip->io_lock);

	return ret;
}
EXPORT_SYMBOL(pm8607_reg_write);

int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
		     int count, unsigned char *buf)
{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, count, buf);
	mutex_unlock(&chip->io_lock);

	return ret;
}
EXPORT_SYMBOL(pm8607_bulk_read);

int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
		      int count, unsigned char *buf)
{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->write(chip, reg, count, buf);
	mutex_unlock(&chip->io_lock);

	return ret;
}
EXPORT_SYMBOL(pm8607_bulk_write);

int pm8607_set_bits(struct pm8607_chip *chip, int reg,
		    unsigned char mask, unsigned char data)
{
	unsigned char value;
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, 1, &value);
	if (ret < 0)
		goto out;
	value &= ~mask;
	value |= data;
	ret = chip->write(chip, reg, 1, &value);
out:
	mutex_unlock(&chip->io_lock);
	return ret;
}
EXPORT_SYMBOL(pm8607_set_bits);


static const struct i2c_device_id pm8607_id_table[] = {
	{ "88PM8607", 0 },
	{}
};
MODULE_DEVICE_TABLE(i2c, pm8607_id_table);


static int __devinit pm8607_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	struct pm8607_platform_data *pdata = client->dev.platform_data;
	struct pm8607_chip *chip;
	int i, count;
	int ret;

	chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;

	chip->client = client;
	chip->dev = &client->dev;
	chip->read = pm8607_read_device;
	chip->write = pm8607_write_device;
	i2c_set_clientdata(client, chip);

	mutex_init(&chip->io_lock);
	dev_set_drvdata(chip->dev, chip);

	ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
		goto out;
	}
	if ((ret & CHIP_ID_MASK) == CHIP_ID)
		dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
			 ret);
	else {
		dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
			"Chip ID: %02x\n", ret);
		goto out;
	}
	chip->chip_id = ret;

	ret = pm8607_reg_read(chip, PM8607_BUCK3);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
		goto out;
	}
	if (ret & PM8607_BUCK3_DOUBLE)
		chip->buck3_double = 1;

	ret = pm8607_reg_read(chip, PM8607_MISC1);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
		goto out;
	}
	if (pdata->i2c_port == PI2C_PORT)
		ret |= PM8607_MISC1_PI2C;
	else
		ret &= ~PM8607_MISC1_PI2C;
	ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
		goto out;
	}


	count = ARRAY_SIZE(pm8607_devs);
	for (i = 0; i < count; i++) {
		ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
				      1, NULL, 0);
		if (ret != 0) {
			dev_err(chip->dev, "Failed to add subdevs\n");
			goto out;
		}
	}

	return 0;

out:
	i2c_set_clientdata(client, NULL);
	kfree(chip);
	return ret;
}

static int __devexit pm8607_remove(struct i2c_client *client)
{
	struct pm8607_chip *chip = i2c_get_clientdata(client);

	mfd_remove_devices(chip->dev);
	kfree(chip);
	return 0;
}

static struct i2c_driver pm8607_driver = {
	.driver	= {
		.name	= "88PM8607",
		.owner	= THIS_MODULE,
	},
	.probe		= pm8607_probe,
	.remove		= __devexit_p(pm8607_remove),
	.id_table	= pm8607_id_table,
};

static int __init pm8607_init(void)
{
	int ret;
	ret = i2c_add_driver(&pm8607_driver);
	if (ret != 0)
		pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
	return ret;
}
subsys_initcall(pm8607_init);

static void __exit pm8607_exit(void)
{
	i2c_del_driver(&pm8607_driver);
}
module_exit(pm8607_exit);

MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");