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
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
|
/* NXP PCF50633 Power Management Unit (PMU) driver
*
* (C) 2006-2008 by Openmoko, Inc.
* Author: Harald Welte <laforge@openmoko.org>
* Balaji Rao <balajirrao@openmoko.org>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/mfd/pcf50633/core.h>
static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
{
int ret;
ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
num, data);
if (ret < 0)
dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
return ret;
}
static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
{
int ret;
ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
num, data);
if (ret < 0)
dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
return ret;
}
/* Read a block of upto 32 regs */
int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
int nr_regs, u8 *data)
{
int ret;
mutex_lock(&pcf->lock);
ret = __pcf50633_read(pcf, reg, nr_regs, data);
mutex_unlock(&pcf->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_read_block);
/* Write a block of upto 32 regs */
int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
int nr_regs, u8 *data)
{
int ret;
mutex_lock(&pcf->lock);
ret = __pcf50633_write(pcf, reg, nr_regs, data);
mutex_unlock(&pcf->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_write_block);
u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
{
u8 val;
mutex_lock(&pcf->lock);
__pcf50633_read(pcf, reg, 1, &val);
mutex_unlock(&pcf->lock);
return val;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_read);
int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
{
int ret;
mutex_lock(&pcf->lock);
ret = __pcf50633_write(pcf, reg, 1, &val);
mutex_unlock(&pcf->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_write);
int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
{
int ret;
u8 tmp;
val &= mask;
mutex_lock(&pcf->lock);
ret = __pcf50633_read(pcf, reg, 1, &tmp);
if (ret < 0)
goto out;
tmp &= ~mask;
tmp |= val;
ret = __pcf50633_write(pcf, reg, 1, &tmp);
out:
mutex_unlock(&pcf->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
{
int ret;
u8 tmp;
mutex_lock(&pcf->lock);
ret = __pcf50633_read(pcf, reg, 1, &tmp);
if (ret < 0)
goto out;
tmp &= ~val;
ret = __pcf50633_write(pcf, reg, 1, &tmp);
out:
mutex_unlock(&pcf->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
/* sysfs attributes */
static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct pcf50633 *pcf = dev_get_drvdata(dev);
u8 dump[16];
int n, n1, idx = 0;
char *buf1 = buf;
static u8 address_no_read[] = { /* must be ascending */
PCF50633_REG_INT1,
PCF50633_REG_INT2,
PCF50633_REG_INT3,
PCF50633_REG_INT4,
PCF50633_REG_INT5,
0 /* terminator */
};
for (n = 0; n < 256; n += sizeof(dump)) {
for (n1 = 0; n1 < sizeof(dump); n1++)
if (n == address_no_read[idx]) {
idx++;
dump[n1] = 0x00;
} else
dump[n1] = pcf50633_reg_read(pcf, n + n1);
hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
buf1 += strlen(buf1);
*buf1++ = '\n';
*buf1 = '\0';
}
return buf1 - buf;
}
static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
static ssize_t show_resume_reason(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pcf50633 *pcf = dev_get_drvdata(dev);
int n;
n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
pcf->resume_reason[0],
pcf->resume_reason[1],
pcf->resume_reason[2],
pcf->resume_reason[3],
pcf->resume_reason[4]);
return n;
}
static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
static struct attribute *pcf_sysfs_entries[] = {
&dev_attr_dump_regs.attr,
&dev_attr_resume_reason.attr,
NULL,
};
static struct attribute_group pcf_attr_group = {
.name = NULL, /* put in device directory */
.attrs = pcf_sysfs_entries,
};
static void
pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
struct platform_device **pdev)
{
int ret;
*pdev = platform_device_alloc(name, -1);
if (!*pdev) {
dev_err(pcf->dev, "Falied to allocate %s\n", name);
return;
}
(*pdev)->dev.parent = pcf->dev;
ret = platform_device_add(*pdev);
if (ret) {
dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
platform_device_put(*pdev);
*pdev = NULL;
}
}
#ifdef CONFIG_PM
static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
{
struct pcf50633 *pcf;
pcf = i2c_get_clientdata(client);
return pcf50633_irq_suspend(pcf);
}
static int pcf50633_resume(struct i2c_client *client)
{
struct pcf50633 *pcf;
pcf = i2c_get_clientdata(client);
return pcf50633_irq_resume(pcf);
}
#else
#define pcf50633_suspend NULL
#define pcf50633_resume NULL
#endif
static int __devinit pcf50633_probe(struct i2c_client *client,
const struct i2c_device_id *ids)
{
struct pcf50633 *pcf;
struct pcf50633_platform_data *pdata = client->dev.platform_data;
int i, ret;
int version, variant;
if (!client->irq) {
dev_err(&client->dev, "Missing IRQ\n");
return -ENOENT;
}
pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
if (!pcf)
return -ENOMEM;
pcf->pdata = pdata;
mutex_init(&pcf->lock);
i2c_set_clientdata(client, pcf);
pcf->dev = &client->dev;
pcf->i2c_client = client;
version = pcf50633_reg_read(pcf, 0);
variant = pcf50633_reg_read(pcf, 1);
if (version < 0 || variant < 0) {
dev_err(pcf->dev, "Unable to probe pcf50633\n");
ret = -ENODEV;
goto err_free;
}
dev_info(pcf->dev, "Probed device version %d variant %d\n",
version, variant);
pcf50633_irq_init(pcf, client->irq);
/* Create sub devices */
pcf50633_client_dev_register(pcf, "pcf50633-input",
&pcf->input_pdev);
pcf50633_client_dev_register(pcf, "pcf50633-rtc",
&pcf->rtc_pdev);
pcf50633_client_dev_register(pcf, "pcf50633-mbc",
&pcf->mbc_pdev);
pcf50633_client_dev_register(pcf, "pcf50633-adc",
&pcf->adc_pdev);
pcf50633_client_dev_register(pcf, "pcf50633-backlight",
&pcf->bl_pdev);
for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
struct platform_device *pdev;
pdev = platform_device_alloc("pcf50633-regltr", i);
if (!pdev) {
dev_err(pcf->dev, "Cannot create regulator %d\n", i);
continue;
}
pdev->dev.parent = pcf->dev;
platform_device_add_data(pdev, &pdata->reg_init_data[i],
sizeof(pdata->reg_init_data[i]));
pcf->regulator_pdev[i] = pdev;
platform_device_add(pdev);
}
ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
if (ret)
dev_err(pcf->dev, "error creating sysfs entries\n");
if (pdata->probe_done)
pdata->probe_done(pcf);
return 0;
err_free:
kfree(pcf);
return ret;
}
static int __devexit pcf50633_remove(struct i2c_client *client)
{
struct pcf50633 *pcf = i2c_get_clientdata(client);
int i;
sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
pcf50633_irq_free(pcf);
platform_device_unregister(pcf->input_pdev);
platform_device_unregister(pcf->rtc_pdev);
platform_device_unregister(pcf->mbc_pdev);
platform_device_unregister(pcf->adc_pdev);
platform_device_unregister(pcf->bl_pdev);
for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
platform_device_unregister(pcf->regulator_pdev[i]);
kfree(pcf);
return 0;
}
static struct i2c_device_id pcf50633_id_table[] = {
{"pcf50633", 0x73},
{/* end of list */}
};
static struct i2c_driver pcf50633_driver = {
.driver = {
.name = "pcf50633",
},
.id_table = pcf50633_id_table,
.probe = pcf50633_probe,
.remove = __devexit_p(pcf50633_remove),
.suspend = pcf50633_suspend,
.resume = pcf50633_resume,
};
static int __init pcf50633_init(void)
{
return i2c_add_driver(&pcf50633_driver);
}
static void __exit pcf50633_exit(void)
{
i2c_del_driver(&pcf50633_driver);
}
MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
MODULE_LICENSE("GPL");
subsys_initcall(pcf50633_init);
module_exit(pcf50633_exit);
|
