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/*
* Broadcom BCM590xx PMU
*
* Copyright 2014 Linaro Limited
* Author: Matt Porter <mporter@linaro.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/mfd/bcm590xx.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
static const struct mfd_cell bcm590xx_devs[] = {
{
.name = "bcm590xx-vregs",
},
};
static const struct regmap_config bcm590xx_regmap_config_pri = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BCM590XX_MAX_REGISTER_PRI,
.cache_type = REGCACHE_RBTREE,
};
static const struct regmap_config bcm590xx_regmap_config_sec = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BCM590XX_MAX_REGISTER_SEC,
.cache_type = REGCACHE_RBTREE,
};
static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri,
const struct i2c_device_id *id)
{
struct bcm590xx *bcm590xx;
int ret;
bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL);
if (!bcm590xx)
return -ENOMEM;
i2c_set_clientdata(i2c_pri, bcm590xx);
bcm590xx->dev = &i2c_pri->dev;
bcm590xx->i2c_pri = i2c_pri;
bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri,
&bcm590xx_regmap_config_pri);
if (IS_ERR(bcm590xx->regmap_pri)) {
ret = PTR_ERR(bcm590xx->regmap_pri);
dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret);
return ret;
}
/* Secondary I2C slave address is the base address with A(2) asserted */
bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter,
i2c_pri->addr | BIT(2));
if (IS_ERR_OR_NULL(bcm590xx->i2c_sec)) {
dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
return -ENODEV;
}
i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx);
bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec,
&bcm590xx_regmap_config_sec);
if (IS_ERR(bcm590xx->regmap_sec)) {
ret = PTR_ERR(bcm590xx->regmap_sec);
dev_err(&bcm590xx->i2c_sec->dev,
"secondary regmap init failed: %d\n", ret);
goto err;
}
ret = mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs,
ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
if (ret < 0) {
dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret);
goto err;
}
return 0;
err:
i2c_unregister_device(bcm590xx->i2c_sec);
return ret;
}
static int bcm590xx_i2c_remove(struct i2c_client *i2c)
{
mfd_remove_devices(&i2c->dev);
return 0;
}
static const struct of_device_id bcm590xx_of_match[] = {
{ .compatible = "brcm,bcm59056" },
{ }
};
MODULE_DEVICE_TABLE(of, bcm590xx_of_match);
static const struct i2c_device_id bcm590xx_i2c_id[] = {
{ "bcm59056" },
{ }
};
MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
static struct i2c_driver bcm590xx_i2c_driver = {
.driver = {
.name = "bcm590xx",
.of_match_table = of_match_ptr(bcm590xx_of_match),
},
.probe = bcm590xx_i2c_probe,
.remove = bcm590xx_i2c_remove,
.id_table = bcm590xx_i2c_id,
};
module_i2c_driver(bcm590xx_i2c_driver);
MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
MODULE_DESCRIPTION("BCM590xx multi-function driver");
MODULE_LICENSE("GPL v2");
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