1/*
2 * Broadcom BCM590xx PMU
3 *
4 * Copyright 2014 Linaro Limited
5 * Author: Matt Porter <mporter@linaro.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/init.h>
16#include <linux/mfd/bcm590xx.h>
17#include <linux/mfd/core.h>
18#include <linux/module.h>
19#include <linux/moduleparam.h>
20#include <linux/of.h>
21#include <linux/of_device.h>
22#include <linux/regmap.h>
23#include <linux/slab.h>
24
25static const struct mfd_cell bcm590xx_devs[] = {
26 {
27 .name = "bcm590xx-vregs",
28 },
29};
30
31static const struct regmap_config bcm590xx_regmap_config_pri = {
32 .reg_bits = 8,
33 .val_bits = 8,
34 .max_register = BCM590XX_MAX_REGISTER_PRI,
35 .cache_type = REGCACHE_RBTREE,
36};
37
38static const struct regmap_config bcm590xx_regmap_config_sec = {
39 .reg_bits = 8,
40 .val_bits = 8,
41 .max_register = BCM590XX_MAX_REGISTER_SEC,
42 .cache_type = REGCACHE_RBTREE,
43};
44
45static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri,
46 const struct i2c_device_id *id)
47{
48 struct bcm590xx *bcm590xx;
49 int ret;
50
51 bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL);
52 if (!bcm590xx)
53 return -ENOMEM;
54
55 i2c_set_clientdata(i2c_pri, bcm590xx);
56 bcm590xx->dev = &i2c_pri->dev;
57 bcm590xx->i2c_pri = i2c_pri;
58
59 bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri,
60 &bcm590xx_regmap_config_pri);
61 if (IS_ERR(bcm590xx->regmap_pri)) {
62 ret = PTR_ERR(bcm590xx->regmap_pri);
63 dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret);
64 return ret;
65 }
66
67 /* Secondary I2C slave address is the base address with A(2) asserted */
68 bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter,
69 i2c_pri->addr | BIT(2));
70 if (!bcm590xx->i2c_sec) {
71 dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
72 return -ENODEV;
73 }
74 i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx);
75
76 bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec,
77 &bcm590xx_regmap_config_sec);
78 if (IS_ERR(bcm590xx->regmap_sec)) {
79 ret = PTR_ERR(bcm590xx->regmap_sec);
80 dev_err(&bcm590xx->i2c_sec->dev,
81 "secondary regmap init failed: %d\n", ret);
82 goto err;
83 }
84
85 ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs,
86 ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
87 if (ret < 0) {
88 dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret);
89 goto err;
90 }
91
92 return 0;
93
94err:
95 i2c_unregister_device(bcm590xx->i2c_sec);
96 return ret;
97}
98
99static const struct of_device_id bcm590xx_of_match[] = {
100 { .compatible = "brcm,bcm59056" },
101 { }
102};
103MODULE_DEVICE_TABLE(of, bcm590xx_of_match);
104
105static const struct i2c_device_id bcm590xx_i2c_id[] = {
106 { "bcm59056" },
107 { }
108};
109MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
110
111static struct i2c_driver bcm590xx_i2c_driver = {
112 .driver = {
113 .name = "bcm590xx",
114 .of_match_table = of_match_ptr(bcm590xx_of_match),
115 },
116 .probe = bcm590xx_i2c_probe,
117 .id_table = bcm590xx_i2c_id,
118};
119module_i2c_driver(bcm590xx_i2c_driver);
120
121MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
122MODULE_DESCRIPTION("BCM590xx multi-function driver");
123MODULE_LICENSE("GPL v2");
124