mfd: bcm590xx: Add support for secondary I2C slave address

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>

1 files changed, 6 insertions, 3 deletions

diff --git a/include/linux/mfd/bcm590xx.h b/include/linux/mfd/bcm590xx.h
index 434df2d4e587..267aedee1c7a 100644
--- a/include/linux/mfd/bcm590xx.h
+++ b/include/linux/mfd/bcm590xx.h
@@ -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;
 };