mfd: Add bcm590xx pmu driver (037b60f2) · Commits · 戴 / test

drivers/mfd/Kconfig

+8 −0

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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

drivers/mfd/Makefile

+1 −0

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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

drivers/mfd/bcm590xx.c

0 → 100644

+93 −0

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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 = {
		.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");

include/linux/mfd/bcm590xx.h

0 → 100644

+31 −0

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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.
		*
		*/

		#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 */

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