diff options
author | Marc Reilly <marc@cpdesign.com.au> | 2012-04-01 16:41:39 +1000 |
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committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-05-01 12:35:41 +0200 |
commit | df3df6469fd1e59284d6b5d4dd9dbe1bd7861040 (patch) | |
tree | 1864a53128e4ec8488118d49171ae6818442b963 /drivers/mfd/mc13xxx-i2c.c | |
parent | a0c7c1d48ea9f53c67c79eda498bb8eda1422748 (diff) | |
download | linux-df3df6469fd1e59284d6b5d4dd9dbe1bd7861040.tar.gz linux-df3df6469fd1e59284d6b5d4dd9dbe1bd7861040.tar.xz |
mfd: Add mc13xxx i2c driver
Adds support for mc13xxx family ICs connected via i2c.
Signed-off-by: Marc Reilly <marc@cpdesign.com.au>
Acked-by: Oskar Schirmer <oskar@scara.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/mc13xxx-i2c.c')
-rw-r--r-- | drivers/mfd/mc13xxx-i2c.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/mfd/mc13xxx-i2c.c b/drivers/mfd/mc13xxx-i2c.c new file mode 100644 index 000000000000..d22501dad6a6 --- /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"); |