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
|
/*
* TI SMSC MFD Driver
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
*
* Author: Sourav Poddar <sourav.poddar@ti.com>
*
* 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; GPL v2.
*
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/workqueue.h>
#include <linux/irq.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/smsc.h>
#include <linux/of_platform.h>
static const struct regmap_config smsc_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = SMSC_VEN_ID_H,
.cache_type = REGCACHE_RBTREE,
};
static int smsc_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct smsc *smsc;
int devid, rev, venid_l, venid_h;
int ret;
smsc = devm_kzalloc(&i2c->dev, sizeof(*smsc), GFP_KERNEL);
if (!smsc)
return -ENOMEM;
smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config);
if (IS_ERR(smsc->regmap))
return PTR_ERR(smsc->regmap);
i2c_set_clientdata(i2c, smsc);
smsc->dev = &i2c->dev;
#ifdef CONFIG_OF
of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk);
#endif
regmap_read(smsc->regmap, SMSC_DEV_ID, &devid);
regmap_read(smsc->regmap, SMSC_DEV_REV, &rev);
regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l);
regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h);
dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n",
devid, rev, (venid_h << 8) | venid_l);
ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
if (ret)
return ret;
#ifdef CONFIG_OF
if (i2c->dev.of_node)
ret = devm_of_platform_populate(&i2c->dev);
#endif
return ret;
}
static const struct i2c_device_id smsc_i2c_id[] = {
{ "smscece1099", 0},
{},
};
static struct i2c_driver smsc_i2c_driver = {
.driver = {
.name = "smsc",
},
.probe = smsc_i2c_probe,
.id_table = smsc_i2c_id,
};
builtin_i2c_driver(smsc_i2c_driver);
|
