mfd: fusb302: change to host when connect type-c to standard-a cable
[firefly-linux-kernel-4.4.55.git] / drivers / mfd / smsc-ece1099.c
1 /*
2  * TI SMSC MFD Driver
3  *
4  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
5  *
6  * Author: Sourav Poddar <sourav.poddar@ti.com>
7  *
8  *  This program is free software; you can redistribute it and/or modify it
9  *  under  the terms of the GNU General  Public License as published by the
10  *  Free Software Foundation;  GPL v2.
11  *
12  */
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/slab.h>
17 #include <linux/i2c.h>
18 #include <linux/gpio.h>
19 #include <linux/workqueue.h>
20 #include <linux/irq.h>
21 #include <linux/regmap.h>
22 #include <linux/err.h>
23 #include <linux/mfd/core.h>
24 #include <linux/mfd/smsc.h>
25 #include <linux/of_platform.h>
26
27 static const struct regmap_config smsc_regmap_config = {
28                 .reg_bits = 8,
29                 .val_bits = 8,
30                 .max_register = SMSC_VEN_ID_H,
31                 .cache_type = REGCACHE_RBTREE,
32 };
33
34 static int smsc_i2c_probe(struct i2c_client *i2c,
35                         const struct i2c_device_id *id)
36 {
37         struct smsc *smsc;
38         int devid, rev, venid_l, venid_h;
39         int ret = 0;
40
41         smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc),
42                                 GFP_KERNEL);
43         if (!smsc) {
44                 dev_err(&i2c->dev, "smsc mfd driver memory allocation failed\n");
45                 return -ENOMEM;
46         }
47
48         smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config);
49         if (IS_ERR(smsc->regmap)) {
50                 ret = PTR_ERR(smsc->regmap);
51                 goto err;
52         }
53
54         i2c_set_clientdata(i2c, smsc);
55         smsc->dev = &i2c->dev;
56
57 #ifdef CONFIG_OF
58         of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk);
59 #endif
60
61         regmap_read(smsc->regmap, SMSC_DEV_ID, &devid);
62         regmap_read(smsc->regmap, SMSC_DEV_REV, &rev);
63         regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l);
64         regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h);
65
66         dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n",
67                 devid, rev, (venid_h << 8) | venid_l);
68
69         ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
70         if (ret)
71                 goto err;
72
73 #ifdef CONFIG_OF
74         if (i2c->dev.of_node)
75                 ret = of_platform_populate(i2c->dev.of_node,
76                                            NULL, NULL, &i2c->dev);
77 #endif
78
79 err:
80         return ret;
81 }
82
83 static int smsc_i2c_remove(struct i2c_client *i2c)
84 {
85         struct smsc *smsc = i2c_get_clientdata(i2c);
86
87         mfd_remove_devices(smsc->dev);
88
89         return 0;
90 }
91
92 static const struct i2c_device_id smsc_i2c_id[] = {
93         { "smscece1099", 0},
94         {},
95 };
96 MODULE_DEVICE_TABLE(i2c, smsc_i2c_id);
97
98 static struct i2c_driver smsc_i2c_driver = {
99         .driver = {
100                    .name = "smsc",
101         },
102         .probe = smsc_i2c_probe,
103         .remove = smsc_i2c_remove,
104         .id_table = smsc_i2c_id,
105 };
106
107 module_i2c_driver(smsc_i2c_driver);
108
109 MODULE_AUTHOR("Sourav Poddar <sourav.poddar@ti.com>");
110 MODULE_DESCRIPTION("SMSC chip multi-function driver");
111 MODULE_LICENSE("GPL v2");