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mfd: bcm590xx: Add support for secondary I2C slave address

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BCM590xx utilizes a secondary I2C slave address to access additional
register space. Add support for the secondary address space by
instantiating a dummy I2C device with the appropriate secondary
I2C slave address. Also expose a secondary regmap register space so
that MFD drivers can access this secondary i2c slave address space.

Signed-off-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Matt Porter
2014-04-23 19:21:31 -04:00
committed by Lee Jones
parent bb7f32fe96
commit 9e1e726311
2 changed files with 53 additions and 18 deletions
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9
include/linux/mfd/bcm590xx.h
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@@ -19,12 +19,15 @@
#include <linux/regmap.h>
/* max register address */
#define BCM590XX_MAX_REGISTER 0xe7
#define BCM590XX_MAX_REGISTER_PRI 0xe7
#define BCM590XX_MAX_REGISTER_SEC 0xf0
struct bcm590xx {
struct device *dev;
struct i2c_client *i2c_client;
struct regmap *regmap;
struct i2c_client *i2c_pri;
struct i2c_client *i2c_sec;
struct regmap *regmap_pri;
struct regmap *regmap_sec;
unsigned int id;
};