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gerrit-public.fairphone.software / kernel / msm-5.4 / 962399bb7fbf5ce0c5b768ca7115614f31ff8f3f / . / drivers / mfd / smsc-ece1099.c
blob: 57b792eb58fd2cd491b81ed3d7385174db26e99b [file] [log] [blame]
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]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
Paul Gortmakerda4d0f22016-09-12 10:40:52 -0400[diff] [blame]14#include <linux/init.h>
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]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
Krzysztof Kozlowski486212f2015-01-05 10:01:29 +0100[diff] [blame]26static const struct regmap_config smsc_regmap_config = {
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]27 .reg_bits = 8,
28 .val_bits = 8,
29 .max_register = SMSC_VEN_ID_H,
30 .cache_type = REGCACHE_RBTREE,
31};
32
33static 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;
Markus Elfring53b34b82016-06-26 14:14:54 +0200[diff] [blame]38 int ret;
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]39
Markus Elfring8349aeb2018-03-08 15:05:16 +0100[diff] [blame]40 smsc = devm_kzalloc(&i2c->dev, sizeof(*smsc), GFP_KERNEL);
Markus Elfring46c8aa82018-01-16 08:52:27 +0100[diff] [blame]41 if (!smsc)
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]42 return -ENOMEM;
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]43
44 smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config);
Markus Elfring4dc03d02016-06-26 14:30:46 +0200[diff] [blame]45 if (IS_ERR(smsc->regmap))
46 return PTR_ERR(smsc->regmap);
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]47
48 i2c_set_clientdata(i2c, smsc);
49 smsc->dev = &i2c->dev;
50
51#ifdef CONFIG_OF
52 of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk);
53#endif
54
55 regmap_read(smsc->regmap, SMSC_DEV_ID, &devid);
56 regmap_read(smsc->regmap, SMSC_DEV_REV, &rev);
57 regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l);
58 regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h);
59
60 dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n",
61 devid, rev, (venid_h << 8) | venid_l);
62
63 ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
64 if (ret)
Markus Elfring4dc03d02016-06-26 14:30:46 +0200[diff] [blame]65 return ret;
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]66
67#ifdef CONFIG_OF
68 if (i2c->dev.of_node)
Benjamin Gaignard66002162017-05-29 17:46:01 +0200[diff] [blame]69 ret = devm_of_platform_populate(&i2c->dev);
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]70#endif
71
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]72 return ret;
73}
74
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]75static const struct i2c_device_id smsc_i2c_id[] = {
76 { "smscece1099", 0},
77 {},
78};
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]79
80static struct i2c_driver smsc_i2c_driver = {
81 .driver = {
82 .name = "smsc",
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]83 },
84 .probe = smsc_i2c_probe,
Sourav Poddar82843282012-10-01 16:31:22 +0530[diff] [blame]85 .id_table = smsc_i2c_id,
86};
Paul Gortmakerda4d0f22016-09-12 10:40:52 -0400[diff] [blame]87builtin_i2c_driver(smsc_i2c_driver);