diff options
| -rw-r--r-- | drivers/mfd/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/mc13xxx-i2c.c | 128 |
3 files changed, 137 insertions, 1 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 9c8294c26efb..ef86a741b7e2 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -597,7 +597,7 @@ 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 @@ -615,6 +615,13 @@ 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 + select REGMAP_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 7ce5b5c15dee..5dd6be7aa350 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -55,6 +55,7 @@ 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 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"); |