lkml.org 
[lkml]   [2012]   [Mar]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v4 4/4] mfd: mc13xxx: Add i2c driver
    Date
    Adds support for mc13xxx family ICs connected via i2c.

    Signed-off-by: Marc Reilly <marc@cpdesign.com.au>
    ---
    drivers/mfd/Kconfig | 8 +++-
    drivers/mfd/Makefile | 1 +
    drivers/mfd/mc13xxx-i2c.c | 128 +++++++++++++++++++++++++++++++++++++++++++++
    3 files changed, 136 insertions(+), 1 deletions(-)
    create mode 100644 drivers/mfd/mc13xxx-i2c.c

    diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    index 501fee5..3a039ff 100644
    --- a/drivers/mfd/Kconfig
    +++ b/drivers/mfd/Kconfig
    @@ -573,7 +573,7 @@ config MFD_MC13783

    config MFD_MC13XXX
    tristate "Support Freescale MC13783 and MC13892"
    - depends on SPI_MASTER
    + depends on SPI_MASTER || I2C
    select MFD_CORE
    select MFD_MC13783
    help
    @@ -590,6 +590,12 @@ config MFD_MC13XXX_SPI
    help
    Select this if your MC13xxx is connected via an SPI bus.

    +config MFD_MC13XXX_I2C
    + tristate "MC13xxx I2C interface" if I2C
    + default I2C
    + help
    + Select this if your MC13xxx is connected via an I2C bus.
    +
    endif

    config ABX500_CORE
    diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    index 2dc66ed..6d4566f 100644
    --- a/drivers/mfd/Makefile
    +++ b/drivers/mfd/Makefile
    @@ -54,6 +54,7 @@ obj-$(CONFIG_TWL6040_CORE) += twl6040-core.o twl6040-irq.o

    obj-$(CONFIG_MFD_MC13XXX) += mc13xxx-core.o
    obj-$(CONFIG_MFD_MC13XXX_SPI) += mc13xxx-spi.o
    +obj-$(CONFIG_MFD_MC13XXX_I2C) += mc13xxx-i2c.o

    obj-$(CONFIG_MFD_CORE) += mfd-core.o

    diff --git a/drivers/mfd/mc13xxx-i2c.c b/drivers/mfd/mc13xxx-i2c.c
    new file mode 100644
    index 0000000..d22501d
    --- /dev/null
    +++ b/drivers/mfd/mc13xxx-i2c.c
    @@ -0,0 +1,128 @@
    +/*
    + * Copyright 2009-2010 Creative Product Design
    + * Marc Reilly marc@cpdesign.com.au
    + *
    + * 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.
    + */
    +
    +#include <linux/slab.h>
    +#include <linux/module.h>
    +#include <linux/platform_device.h>
    +#include <linux/mutex.h>
    +#include <linux/mfd/core.h>
    +#include <linux/mfd/mc13xxx.h>
    +#include <linux/of.h>
    +#include <linux/of_device.h>
    +#include <linux/of_gpio.h>
    +#include <linux/i2c.h>
    +#include <linux/err.h>
    +
    +#include "mc13xxx.h"
    +
    +static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
    + {
    + .name = "mc13892",
    + .driver_data = MC13XXX_ID_MC13892,
    + }, {
    + /* sentinel */
    + }
    +};
    +MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
    +
    +static const struct of_device_id mc13xxx_dt_ids[] = {
    + {
    + .compatible = "fsl,mc13892",
    + .data = (void *) &mc13xxx_i2c_device_id[0],
    + }, {
    + /* sentinel */
    + }
    +};
    +MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
    +
    +static struct regmap_config mc13xxx_regmap_i2c_config = {
    + .reg_bits = 8,
    + .val_bits = 24,
    +
    + .max_register = MC13XXX_NUMREGS,
    +
    + .cache_type = REGCACHE_NONE,
    +};
    +
    +static int mc13xxx_i2c_probe(struct i2c_client *client,
    + const struct i2c_device_id *id)
    +{
    + const struct of_device_id *of_id;
    + struct i2c_driver *idrv = to_i2c_driver(client->dev.driver);
    + struct mc13xxx *mc13xxx;
    + struct mc13xxx_platform_data *pdata = dev_get_platdata(&client->dev);
    + int ret;
    +
    + of_id = of_match_device(mc13xxx_dt_ids, &client->dev);
    + if (of_id)
    + idrv->id_table = (const struct i2c_device_id*) of_id->data;
    +
    + mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
    + if (!mc13xxx)
    + return -ENOMEM;
    +
    + dev_set_drvdata(&client->dev, mc13xxx);
    +
    + mc13xxx->dev = &client->dev;
    + mutex_init(&mc13xxx->lock);
    +
    + mc13xxx->regmap = regmap_init_i2c(client, &mc13xxx_regmap_i2c_config);
    + if (IS_ERR(mc13xxx->regmap)) {
    + ret = PTR_ERR(mc13xxx->regmap);
    + dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
    + ret);
    + dev_set_drvdata(&client->dev, NULL);
    + kfree(mc13xxx);
    + return ret;
    + }
    +
    + ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
    +
    + if (ret == 0 && (id->driver_data != mc13xxx->ictype))
    + dev_warn(mc13xxx->dev,
    + "device id doesn't match auto detection!\n");
    +
    + return ret;
    +}
    +
    +static int __devexit mc13xxx_i2c_remove(struct i2c_client *client)
    +{
    + struct mc13xxx *mc13xxx = dev_get_drvdata(&client->dev);
    +
    + mc13xxx_common_cleanup(mc13xxx);
    +
    + return 0;
    +}
    +
    +static struct i2c_driver mc13xxx_i2c_driver = {
    + .id_table = mc13xxx_i2c_device_id,
    + .driver = {
    + .owner = THIS_MODULE,
    + .name = "mc13xxx",
    + .of_match_table = mc13xxx_dt_ids,
    + },
    + .probe = mc13xxx_i2c_probe,
    + .remove = __devexit_p(mc13xxx_i2c_remove),
    +};
    +
    +static int __init mc13xxx_i2c_init(void)
    +{
    + return i2c_add_driver(&mc13xxx_i2c_driver);
    +}
    +subsys_initcall(mc13xxx_i2c_init);
    +
    +static void __exit mc13xxx_i2c_exit(void)
    +{
    + i2c_del_driver(&mc13xxx_i2c_driver);
    +}
    +module_exit(mc13xxx_i2c_exit);
    +
    +MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
    +MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
    +MODULE_LICENSE("GPL v2");
    --
    1.7.3.4


    \
     
     \ /
      Last update: 2012-03-19 06:03    [W:0.027 / U:122.160 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site