mfd: Use completion interrupt for WM835x AUXADC

Use the completion interrupt generated by the device rather than
polling for conversions to complete. As a backup we still check
the state of the AUXADC if we don't get a completion, mostly for
systems that don't have the WM8350 interrupt infrastructure hooked
up.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/mfd/wm8350/core.h b/include/linux/mfd/wm8350/core.h
index fae08aa6541..98fcc977e82 100644
--- a/include/linux/mfd/wm8350/core.h
+++ b/include/linux/mfd/wm8350/core.h
@@ -16,6 +16,7 @@
 #include <linux/kernel.h>
 #include <linux/mutex.h>
 #include <linux/interrupt.h>
+#include <linux/completion.h>
 
 #include <linux/mfd/wm8350/audio.h>
 #include <linux/mfd/wm8350/gpio.h>
@@ -621,6 +622,7 @@ struct wm8350 {
         u16 *reg_cache;
 
         struct mutex auxadc_mutex;
+        struct completion auxadc_done;
 
         /* Interrupt handling */
         struct mutex irq_lock;