mfd: Add bcm590xx pmu driver
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>
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@ -59,6 +59,14 @@ config MFD_AAT2870_CORE
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additional drivers must be enabled in order to use the
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functionality of the device.
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config MFD_BCM590XX
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tristate "Broadcom BCM590xx PMUs"
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select MFD_CORE
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select REGMAP_I2C
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depends on I2C
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help
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Support for the BCM590xx PMUs from Broadcom
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config MFD_CROS_EC
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tristate "ChromeOS Embedded Controller"
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select MFD_CORE
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@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o
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obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
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obj-$(CONFIG_MFD_SM501) += sm501.o
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obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
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obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o
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obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o
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obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
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obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
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93
drivers/mfd/bcm590xx.c
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93
drivers/mfd/bcm590xx.c
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@ -0,0 +1,93 @@
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/*
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* Broadcom BCM590xx PMU
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*
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* Copyright 2014 Linaro Limited
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* Author: Matt Porter <mporter@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/mfd/bcm590xx.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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static const struct mfd_cell bcm590xx_devs[] = {
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{
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.name = "bcm590xx-vregs",
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},
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};
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static const struct regmap_config bcm590xx_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = BCM590XX_MAX_REGISTER,
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.cache_type = REGCACHE_RBTREE,
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};
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static int bcm590xx_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct bcm590xx *bcm590xx;
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int ret;
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bcm590xx = devm_kzalloc(&i2c->dev, sizeof(*bcm590xx), GFP_KERNEL);
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if (!bcm590xx)
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return -ENOMEM;
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i2c_set_clientdata(i2c, bcm590xx);
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bcm590xx->dev = &i2c->dev;
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bcm590xx->i2c_client = i2c;
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bcm590xx->regmap = devm_regmap_init_i2c(i2c, &bcm590xx_regmap_config);
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if (IS_ERR(bcm590xx->regmap)) {
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ret = PTR_ERR(bcm590xx->regmap);
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dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
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return ret;
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}
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ret = mfd_add_devices(&i2c->dev, -1, bcm590xx_devs,
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ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
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if (ret < 0)
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dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
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return ret;
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}
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static const struct of_device_id bcm590xx_of_match[] = {
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{ .compatible = "brcm,bcm59056" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, bcm590xx_of_match);
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static const struct i2c_device_id bcm590xx_i2c_id[] = {
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{ "bcm59056" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
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static struct i2c_driver bcm590xx_i2c_driver = {
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.driver = {
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.name = "bcm590xx",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(bcm590xx_of_match),
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},
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.probe = bcm590xx_i2c_probe,
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.id_table = bcm590xx_i2c_id,
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};
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module_i2c_driver(bcm590xx_i2c_driver);
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MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
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MODULE_DESCRIPTION("BCM590xx multi-function driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:bcm590xx");
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31
include/linux/mfd/bcm590xx.h
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31
include/linux/mfd/bcm590xx.h
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@ -0,0 +1,31 @@
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/*
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* Broadcom BCM590xx PMU
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*
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* Copyright 2014 Linaro Limited
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* Author: Matt Porter <mporter@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#ifndef __LINUX_MFD_BCM590XX_H
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#define __LINUX_MFD_BCM590XX_H
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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/* max register address */
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#define BCM590XX_MAX_REGISTER 0xe7
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struct bcm590xx {
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struct device *dev;
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struct i2c_client *i2c_client;
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struct regmap *regmap;
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unsigned int id;
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};
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#endif /* __LINUX_MFD_BCM590XX_H */
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