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author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-19 16:35:49 +0100 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-23 13:30:41 +0100 |
commit | c6f756223ad6bf5b71f1b9454b092f3dbe94900f (patch) | |
tree | daa236dfb45e06f3cabf31443348f83169ad7a05 /drivers | |
parent | 966cdc96e15d113da80622bdddd63b461a7492f5 (diff) | |
download | op-kernel-dev-c6f756223ad6bf5b71f1b9454b092f3dbe94900f.zip op-kernel-dev-c6f756223ad6bf5b71f1b9454b092f3dbe94900f.tar.gz |
mfd: arizona: I2C bus interface
Several forthcoming Wolfson devices are based on a common platform
known as Arizona allowing a great deal of reuse of driver code. This
patch adds I2C bus interface code for the devices.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mfd/arizona-i2c.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-i2c.c b/drivers/mfd/arizona-i2c.c new file mode 100644 index 0000000..75fb110 --- /dev/null +++ b/drivers/mfd/arizona-i2c.c @@ -0,0 +1,89 @@ +/* + * Arizona-i2c.c -- Arizona I2C bus interface + * + * Copyright 2012 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + * + * 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/err.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> + +#include <linux/mfd/arizona/core.h> + +#include "arizona.h" + +static __devinit int arizona_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct arizona *arizona; + const struct regmap_config *regmap_config; + int ret; + + switch (id->driver_data) { + case WM5102: + regmap_config = &wm5102_i2c_regmap; + break; + default: + dev_err(&i2c->dev, "Unknown device type %ld\n", + id->driver_data); + return -EINVAL; + } + + arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); + if (arizona == NULL) + return -ENOMEM; + + arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); + if (IS_ERR(arizona->regmap)) { + ret = PTR_ERR(arizona->regmap); + dev_err(&i2c->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + arizona->type = id->driver_data; + arizona->dev = &i2c->dev; + arizona->irq = i2c->irq; + + return arizona_dev_init(arizona); +} + +static int __devexit arizona_i2c_remove(struct i2c_client *i2c) +{ + struct arizona *arizona = dev_get_drvdata(&i2c->dev); + arizona_dev_exit(arizona); + return 0; +} + +static const struct i2c_device_id arizona_i2c_id[] = { + { "wm5102", WM5102 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); + +static struct i2c_driver arizona_i2c_driver = { + .driver = { + .name = "arizona", + .owner = THIS_MODULE, + .pm = &arizona_pm_ops, + }, + .probe = arizona_i2c_probe, + .remove = __devexit_p(arizona_i2c_remove), + .id_table = arizona_i2c_id, +}; + +module_i2c_driver(arizona_i2c_driver); + +MODULE_DESCRIPTION("Arizona I2C bus interface"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |