mfd: Add TPS6507x support

TPS6507x are multi function (PM, touchscreen) chipsets from TI.
This commit also changes the corresponding regulator driver from being
standalone to an MFD subdevice.

Signed-off-by: Todd Fischer <todd.fischer@ridgerun.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/linux/mfd/tps6507x.h b/include/linux/mfd/tps6507x.h
index fd73af5fb95a..9543cb716428 100644
--- a/include/linux/mfd/tps6507x.h
+++ b/include/linux/mfd/tps6507x.h
@@ -131,6 +131,8 @@
 /* VDCDC MASK */
 #define TPS6507X_DEFDCDCX_DCDC_MASK             0X3F
 
+#define TPS6507X_MAX_REGISTER                   0X19
+
 /**
  * struct tps6507x_board - packages regulator and touchscreen init data
  * @tps6507x_regulator_data: regulator initialization values
@@ -142,4 +144,24 @@ struct tps6507x_board {
         struct regulator_init_data *tps6507x_pmic_init_data;
 };
 
+/**
+ * struct tps6507x_dev - tps6507x sub-driver chip access routines
+ * @read_dev() - I2C register read function
+ * @write_dev() - I2C register write function
+ *
+ * Device data may be used to access the TPS6507x chip
+ */
+
+struct tps6507x_dev {
+        struct device *dev;
+        struct i2c_client *i2c_client;
+        int (*read_dev)(struct tps6507x_dev *tps6507x, char reg, int size,
+                        void *dest);
+        int (*write_dev)(struct tps6507x_dev *tps6507x, char reg, int size,
+                         void *src);
+
+        /* Client devices */
+        struct tps6507x_pmic *pmic;
+};
+
 #endif /*  __LINUX_MFD_TPS6507X_H */