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8284328c SP |
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 | ||
da4d0f24 | 14 | #include <linux/init.h> |
8284328c SP |
15 | #include <linux/slab.h> |
16 | #include <linux/i2c.h> | |
17 | #include <linux/gpio.h> | |
18 | #include <linux/workqueue.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/regmap.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/mfd/core.h> | |
23 | #include <linux/mfd/smsc.h> | |
24 | #include <linux/of_platform.h> | |
25 | ||
486212f5 | 26 | static const struct regmap_config smsc_regmap_config = { |
8284328c SP |
27 | .reg_bits = 8, |
28 | .val_bits = 8, | |
29 | .max_register = SMSC_VEN_ID_H, | |
30 | .cache_type = REGCACHE_RBTREE, | |
31 | }; | |
32 | ||
33 | static int smsc_i2c_probe(struct i2c_client *i2c, | |
34 | const struct i2c_device_id *id) | |
35 | { | |
36 | struct smsc *smsc; | |
37 | int devid, rev, venid_l, venid_h; | |
53b34b8d | 38 | int ret; |
8284328c SP |
39 | |
40 | smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc), | |
41 | GFP_KERNEL); | |
42 | if (!smsc) { | |
43 | dev_err(&i2c->dev, "smsc mfd driver memory allocation failed\n"); | |
44 | return -ENOMEM; | |
45 | } | |
46 | ||
47 | smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config); | |
4dc03d0a ME |
48 | if (IS_ERR(smsc->regmap)) |
49 | return PTR_ERR(smsc->regmap); | |
8284328c SP |
50 | |
51 | i2c_set_clientdata(i2c, smsc); | |
52 | smsc->dev = &i2c->dev; | |
53 | ||
54 | #ifdef CONFIG_OF | |
55 | of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk); | |
56 | #endif | |
57 | ||
58 | regmap_read(smsc->regmap, SMSC_DEV_ID, &devid); | |
59 | regmap_read(smsc->regmap, SMSC_DEV_REV, &rev); | |
60 | regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l); | |
61 | regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h); | |
62 | ||
63 | dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n", | |
64 | devid, rev, (venid_h << 8) | venid_l); | |
65 | ||
66 | ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk); | |
67 | if (ret) | |
4dc03d0a | 68 | return ret; |
8284328c SP |
69 | |
70 | #ifdef CONFIG_OF | |
71 | if (i2c->dev.of_node) | |
66002163 | 72 | ret = devm_of_platform_populate(&i2c->dev); |
8284328c SP |
73 | #endif |
74 | ||
8284328c SP |
75 | return ret; |
76 | } | |
77 | ||
8284328c SP |
78 | static const struct i2c_device_id smsc_i2c_id[] = { |
79 | { "smscece1099", 0}, | |
80 | {}, | |
81 | }; | |
8284328c SP |
82 | |
83 | static struct i2c_driver smsc_i2c_driver = { | |
84 | .driver = { | |
85 | .name = "smsc", | |
8284328c SP |
86 | }, |
87 | .probe = smsc_i2c_probe, | |
8284328c SP |
88 | .id_table = smsc_i2c_id, |
89 | }; | |
da4d0f24 | 90 | builtin_i2c_driver(smsc_i2c_driver); |