1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Broadcom BCM590xx PMU
4 *
5 * Copyright 2014 Linaro Limited
6 * Author: Matt Porter <mporter@linaro.org>
7 */
8
9#include <linux/err.h>
10#include <linux/i2c.h>
11#include <linux/init.h>
12#include <linux/mfd/bcm590xx.h>
13#include <linux/mfd/core.h>
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/of.h>
17#include <linux/regmap.h>
18#include <linux/slab.h>
19
20static const struct mfd_cell bcm590xx_devs[] = {
21	{
22		.name = "bcm590xx-vregs",
23	},
24};
25
26static const struct regmap_config bcm590xx_regmap_config_pri = {
27	.reg_bits	= 8,
28	.val_bits	= 8,
29	.max_register	= BCM590XX_MAX_REGISTER_PRI,
30	.cache_type	= REGCACHE_MAPLE,
31};
32
33static const struct regmap_config bcm590xx_regmap_config_sec = {
34	.reg_bits	= 8,
35	.val_bits	= 8,
36	.max_register	= BCM590XX_MAX_REGISTER_SEC,
37	.cache_type	= REGCACHE_MAPLE,
38};
39
40static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri)
41{
42	struct bcm590xx *bcm590xx;
43	int ret;
44
45	bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL);
46	if (!bcm590xx)
47		return -ENOMEM;
48
49	i2c_set_clientdata(i2c_pri, bcm590xx);
50	bcm590xx->dev = &i2c_pri->dev;
51	bcm590xx->i2c_pri = i2c_pri;
52
53	bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri,
54						 &bcm590xx_regmap_config_pri);
55	if (IS_ERR(bcm590xx->regmap_pri)) {
56		ret = PTR_ERR(bcm590xx->regmap_pri);
57		dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret);
58		return ret;
59	}
60
61	/* Secondary I2C slave address is the base address with A(2) asserted */
62	bcm590xx->i2c_sec = i2c_new_dummy_device(i2c_pri->adapter,
63					  i2c_pri->addr | BIT(2));
64	if (IS_ERR(bcm590xx->i2c_sec)) {
65		dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
66		return PTR_ERR(bcm590xx->i2c_sec);
67	}
68	i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx);
69
70	bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec,
71						&bcm590xx_regmap_config_sec);
72	if (IS_ERR(bcm590xx->regmap_sec)) {
73		ret = PTR_ERR(bcm590xx->regmap_sec);
74		dev_err(&bcm590xx->i2c_sec->dev,
75			"secondary regmap init failed: %d\n", ret);
76		goto err;
77	}
78
79	ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs,
80				   ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
81	if (ret < 0) {
82		dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret);
83		goto err;
84	}
85
86	return 0;
87
88err:
89	i2c_unregister_device(bcm590xx->i2c_sec);
90	return ret;
91}
92
93static const struct of_device_id bcm590xx_of_match[] = {
94	{ .compatible = "brcm,bcm59056" },
95	{ }
96};
97MODULE_DEVICE_TABLE(of, bcm590xx_of_match);
98
99static const struct i2c_device_id bcm590xx_i2c_id[] = {
100	{ "bcm59056" },
101	{ }
102};
103MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
104
105static struct i2c_driver bcm590xx_i2c_driver = {
106	.driver = {
107		   .name = "bcm590xx",
108		   .of_match_table = bcm590xx_of_match,
109	},
110	.probe = bcm590xx_i2c_probe,
111	.id_table = bcm590xx_i2c_id,
112};
113module_i2c_driver(bcm590xx_i2c_driver);
114
115MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
116MODULE_DESCRIPTION("BCM590xx multi-function driver");
117MODULE_LICENSE("GPL v2");
118