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    Subject[PATCH v2.1 1/7] Adding Skyworks SKY81452 MFD driver
    Date
    v2.1:
    Clear mfd_cells to zero before setting.
    Added of_compatible into mfd_cells

    ---
    drivers/mfd/Kconfig | 12 +++++
    drivers/mfd/Makefile | 1 +
    drivers/mfd/sky81452.c | 111 +++++++++++++++++++++++++++++++++++++++++++
    include/linux/mfd/sky81452.h | 32 +++++++++++++
    4 files changed, 156 insertions(+)
    create mode 100644 drivers/mfd/sky81452.c
    create mode 100644 include/linux/mfd/sky81452.h

    diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    index de5abf2..6962b4e 100644
    --- a/drivers/mfd/Kconfig
    +++ b/drivers/mfd/Kconfig
    @@ -626,6 +626,18 @@ 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
    diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    index f001487..6c2f317 100644
    --- a/drivers/mfd/Makefile
    +++ b/drivers/mfd/Makefile
    @@ -169,6 +169,7 @@ obj-$(CONFIG_MFD_AS3711) += as3711.o
    obj-$(CONFIG_MFD_AS3722) += as3722.o
    obj-$(CONFIG_MFD_STW481X) += stw481x.o
    obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.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
    diff --git a/drivers/mfd/sky81452.c b/drivers/mfd/sky81452.c
    new file mode 100644
    index 0000000..e91b928
    --- /dev/null
    +++ b/drivers/mfd/sky81452.c
    @@ -0,0 +1,111 @@
    +/*
    + * 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 as published by the
    + * Free Software Foundation; either version 2, or (at your option) any
    + * later version.
    + *
    + * 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 I2C:%d", PTR_ERR(regmap));
    + return PTR_ERR(regmap);
    + }
    +
    + i2c_set_clientdata(client, regmap);
    +
    + memset(cells, 0, sizeof(cells));
    + cells[0].name = "sky81452-bl";
    + 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].of_compatible = "skyworks,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 (IS_ERR_VALUE(ret))
    + dev_err(dev, "failed to add child device:%d", 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");
    +MODULE_VERSION("1.1");
    diff --git a/include/linux/mfd/sky81452.h b/include/linux/mfd/sky81452.h
    new file mode 100644
    index 0000000..142f762
    --- /dev/null
    +++ b/include/linux/mfd/sky81452.h
    @@ -0,0 +1,32 @@
    +/*
    + * 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 as published by the
    + * Free Software Foundation; either version 2, or (at your option) any
    + * later version.
    + *
    + * 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/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
    --
    1.9.1


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