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mfd: Add bcm590xx pmu driver

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Add a driver for the BCM590xx PMU multi-function devices. The driver
initially supports regmap initialization and instantiation of the
voltage regulator device function of the PMU.

Signed-off-by: Matt Porter <mporter@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Matt Porter 2014-03-11 19:33:54 -04:00 committed by Lee Jones
parent c6215037ac
commit 037b60f2ca
4 changed files with 133 additions and 0 deletions
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8
drivers/mfd/Kconfig
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@ -59,6 +59,14 @@ config MFD_AAT2870_CORE
additional drivers must be enabled in order to use the
functionality of the device.
config MFD_BCM590XX
tristate "Broadcom BCM590xx PMUs"
select MFD_CORE
select REGMAP_I2C
depends on I2C
help
Support for the BCM590xx PMUs from Broadcom
config MFD_CROS_EC
tristate "ChromeOS Embedded Controller"
select MFD_CORE

1
drivers/mfd/Makefile
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@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o
obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o
obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o
obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o

93
drivers/mfd/bcm590xx.c Normal file
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@ -0,0 +1,93 @@
/*
* 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 = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BCM590XX_MAX_REGISTER,
.cache_type = REGCACHE_RBTREE,
};
static int bcm590xx_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct bcm590xx *bcm590xx;
int ret;
bcm590xx = devm_kzalloc(&i2c->dev, sizeof(*bcm590xx), GFP_KERNEL);
if (!bcm590xx)
return -ENOMEM;
i2c_set_clientdata(i2c, bcm590xx);
bcm590xx->dev = &i2c->dev;
bcm590xx->i2c_client = i2c;
bcm590xx->regmap = devm_regmap_init_i2c(i2c, &bcm590xx_regmap_config);
if (IS_ERR(bcm590xx->regmap)) {
ret = PTR_ERR(bcm590xx->regmap);
dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
return ret;
}
ret = mfd_add_devices(&i2c->dev, -1, bcm590xx_devs,
ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
if (ret < 0)
dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
return ret;
}
static const struct of_device_id bcm590xx_of_match[] = {
{ .compatible = "brcm,bcm59056" },
{ }
};
MODULE_DEVICE_TABLE(i2c, 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",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(bcm590xx_of_match),
},
.probe = bcm590xx_i2c_probe,
.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");
MODULE_ALIAS("platform:bcm590xx");

31
include/linux/mfd/bcm590xx.h Normal file
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@ -0,0 +1,31 @@
/*
* 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.
*
*/
#ifndef __LINUX_MFD_BCM590XX_H
#define __LINUX_MFD_BCM590XX_H
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
/* max register address */
#define BCM590XX_MAX_REGISTER 0xe7
struct bcm590xx {
struct device *dev;
struct i2c_client *i2c_client;
struct regmap *regmap;
unsigned int id;
};
#endif /* __LINUX_MFD_BCM590XX_H */