mfd: arizona: Add DT binding for the DMIC reference voltages

Add a DT binding that lets the DMIC reference voltage source be
specified for each input.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 9f819989683b..6ca6dfab50eb 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -561,6 +561,16 @@ static int arizona_of_get_core_pdata(struct arizona *arizona)
                 count++;
         }
 
+        count = 0;
+        of_property_for_each_u32(arizona->dev->of_node, "wlf,dmic-ref", prop,
+                                 cur, val) {
+                if (count == ARRAY_SIZE(arizona->pdata.dmic_ref))
+                        break;
+
+                arizona->pdata.dmic_ref[count] = val;
+                count++;
+        }
+
         return 0;
 }