mfd: Add support for Skyworks SKY81452 driver (2698dc22) · Commits · EulixOS / Software / Kernel

drivers/mfd/Kconfig

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		@@ -791,6 +791,18 @@ config MFD_SM501_GPIO
		lines on the SM501. The platform data is used to supply the
		base number for the first GPIO line to register.

		config MFD_SKY81452
		tristate "Skyworks Solutions SKY81452"
		select MFD_CORE
		select REGMAP_I2C
		depends on I2C
		help
		This is the core driver for the Skyworks SKY81452 backlight and
		voltage regulator device.

		This driver can also be built as a module. If so, the module
		will be called sky81452.

		config MFD_SMSC
		bool "SMSC ECE1099 series chips"
		depends on I2C=y

drivers/mfd/Makefile

+1 −0

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		@@ -180,6 +180,7 @@ obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
		obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
		obj-$(CONFIG_MFD_DLN2) += dln2.o
		obj-$(CONFIG_MFD_RT5033) += rt5033.o
		obj-$(CONFIG_MFD_SKY81452) += sky81452.o

		intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
		obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o

drivers/mfd/sky81452.c

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+108 −0

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		/*
		* sky81452.c SKY81452 MFD driver
		*
		* Copyright 2014 Skyworks Solutions Inc.
		* Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License version 2
		* as published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful, but
		* WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		* General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program; if not, see <http://www.gnu.org/licenses/>.
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/err.h>
		#include <linux/slab.h>
		#include <linux/i2c.h>
		#include <linux/regmap.h>
		#include <linux/mfd/core.h>
		#include <linux/mfd/sky81452.h>

		static const struct regmap_config sky81452_config = {
		.reg_bits = 8,
		.val_bits = 8,
		};

		static int sky81452_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct device *dev = &client->dev;
		const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
		struct mfd_cell cells[2];
		struct regmap *regmap;
		int ret;

		if (!pdata) {
		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata)
		return -ENOMEM;
		}

		regmap = devm_regmap_init_i2c(client, &sky81452_config);
		if (IS_ERR(regmap)) {
		dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
		return PTR_ERR(regmap);
		}

		i2c_set_clientdata(client, regmap);

		memset(cells, 0, sizeof(cells));
		cells[0].name = "sky81452-backlight";
		cells[0].of_compatible = "skyworks,sky81452-backlight";
		cells[0].platform_data = pdata->bl_pdata;
		cells[0].pdata_size = sizeof(*pdata->bl_pdata);
		cells[1].name = "sky81452-regulator";
		cells[1].platform_data = pdata->regulator_init_data;
		cells[1].pdata_size = sizeof(*pdata->regulator_init_data);

		ret = mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), NULL, 0, NULL);
		if (ret)
		dev_err(dev, "failed to add child devices. err=%d\n", ret);

		return ret;
		}

		static int sky81452_remove(struct i2c_client *client)
		{
		mfd_remove_devices(&client->dev);
		return 0;
		}

		static const struct i2c_device_id sky81452_ids[] = {
		{ "sky81452" },
		{ }
		};
		MODULE_DEVICE_TABLE(i2c, sky81452_ids);

		#ifdef CONFIG_OF
		static const struct of_device_id sky81452_of_match[] = {
		{ .compatible = "skyworks,sky81452", },
		{ }
		};
		MODULE_DEVICE_TABLE(of, sky81452_of_match);
		#endif

		static struct i2c_driver sky81452_driver = {
		.driver = {
		.name = "sky81452",
		.of_match_table = of_match_ptr(sky81452_of_match),
		},
		.probe = sky81452_probe,
		.remove = sky81452_remove,
		.id_table = sky81452_ids,
		};

		module_i2c_driver(sky81452_driver);

		MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
		MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
		MODULE_LICENSE("GPL v2");

include/linux/mfd/sky81452.h

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		/*
		* sky81452.h SKY81452 MFD driver
		*
		* Copyright 2014 Skyworks Solutions Inc.
		* Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License version 2
		* as published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful, but
		* WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		* General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program; if not, see <http://www.gnu.org/licenses/>.
		*/

		#ifndef _SKY81452_H
		#define _SKY81452_H

		#include <linux/platform_data/sky81452-backlight.h>
		#include <linux/regulator/machine.h>

		struct sky81452_platform_data {
		struct sky81452_bl_platform_data *bl_pdata;
		struct regulator_init_data *regulator_init_data;
		};

		#endif