mfd: Refactor WM8350 chip identification

Since the WM8350 driver was originally written the semantics for the
identification registers of the chip have been clarified, allowing
us to do an exact match on all the fields. This avoids mistakenly
running on unsupported hardware.

Also change to using the datasheet names more consistently for
legibility and fix a printk() that should be dev_err().

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/mfd/wm8350/core.h b/include/linux/mfd/wm8350/core.h
index 3c9735663f36..2a7abeebe777 100644
--- a/include/linux/mfd/wm8350/core.h
+++ b/include/linux/mfd/wm8350/core.h
@@ -29,6 +29,7 @@
  */
 #define WM8350_RESET_ID                         0x00
 #define WM8350_ID                               0x01
+#define WM8350_REVISION                         0x02
 #define WM8350_SYSTEM_CONTROL_1                 0x03
 #define WM8350_SYSTEM_CONTROL_2                 0x04
 #define WM8350_SYSTEM_HIBERNATE                 0x05
@@ -80,6 +81,11 @@
 #define WM8350_CUST_ID_MASK                     0x00FF
 
 /*
+ * R2 (0x02) - Revision
+ */
+#define WM8350_MASK_REV_MASK                    0x00FF
+
+/*
  * R3 (0x03) - System Control 1
  */
 #define WM8350_CHIP_ON                          0x8000