Adds i2c specific code for mc13xxx. Signed-off-by: Marc Reilly <[email protected]> --- drivers/mfd/mc13xxx-i2c.c | 115 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 115 insertions(+), 0 deletions(-) create mode 100644 drivers/mfd/mc13xxx-i2c.c
diff --git a/drivers/mfd/mc13xxx-i2c.c b/drivers/mfd/mc13xxx-i2c.c new file mode 100644 index 0000000..f7ceed8 --- /dev/null +++ b/drivers/mfd/mc13xxx-i2c.c @@ -0,0 +1,115 @@ +/* + * Copyright 2009-2010 Creative Product Design + * Marc Reilly [email protected] + * + * + * 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/i2c.h> + +static int mc13xxx_i2c_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, + u32 *val) +{ + int ret; + unsigned char buf[3] = {0, 0, 0}; + + ret = i2c_smbus_read_i2c_block_data(mc13xxx->i2cclient, + offset, 3, buf); + *val = buf[0] << 16 | buf[1] << 8 | buf[2]; + + return ret == 3 ? 0 : ret; +} + +static int mc13xxx_i2c_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, + u32 val) +{ + int ret; + unsigned char buf[3]; + + buf[0] = (val >> 16) & 0xff; + buf[1] = (val >> 8) & 0xff; + buf[2] = val & 0xff; + + ret = i2c_smbus_write_i2c_block_data(mc13xxx->i2cclient, + offset, 3, buf); + + return ret; +} + +static int mc13xxx_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mc13xxx *mc13xxx; + struct mc13xxx_platform_data *pdata = dev_get_platdata(&client->dev); + int ret; + + mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL); + if (!mc13xxx) + return -ENOMEM; + + dev_set_drvdata(&client->dev, mc13xxx); + mc13xxx->dev = &client->dev; + mc13xxx->i2cclient = client; + mc13xxx->read_dev = mc13xxx_i2c_reg_read; + mc13xxx->write_dev = mc13xxx_i2c_reg_write; + + 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); + + free_irq(client->irq, mc13xxx); + + mfd_remove_devices(&client->dev); + + kfree(mc13xxx); + + return 0; +} + +static const struct i2c_device_id mc13xxx_i2c_idtable[] = { + { "mc13892", MC13XXX_ID_MC13892}, + { } +}; + +static struct i2c_driver mc13xxx_i2c_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "mc13xxx-i2c" + }, + .id_table = mc13xxx_i2c_idtable, + .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 <[email protected]"); +MODULE_LICENSE("GPL v2"); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
