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");