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

Signed-off-by Charles Keepax <[email protected]>

---
 Documentation/devicetree/bindings/mfd/arizona.txt |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

Documentation/devicetree/bindings/mfd/arizona.txt +6 -0

index bfef000..f1b9b7a 100644
@@ -49,6 +49,12 @@ Optional properties:
     input singals. If values less than the number of input signals, elements
     that has not been specifed are set to 0 by default.
 
+  - wlf,dmic-ref : DMIC reference voltage source for each input, can be
+    selected from either MICVDD or one of the MICBIAS's, defines
+    (ARIZONA_DMIC_xxxx) are provided in <dt-bindings/mfd/arizona.txt>. If
+    present, the number of values should be less than or equal to the
+    number of inputs, unspecified inputs will use the chip default.
+
   - DCVDD-supply, MICVDD-supply : Power supplies, only need to be specified if
     they are being externally supplied. As covered in
     Documentation/devicetree/bindings/regulator/regulator.txt

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

Signed-off-by Charles Keepax <ckeepax-yzvPICuk2AATkU/[email protected]>

---

The only change since rev 1 is a slight tweak to the wording of everything to make clear these are voltages.

Thanks,
Charles

 drivers/mfd/arizona-core.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

drivers/mfd/arizona-core.c +10 -0

index 09ba8f1..d6f306e 100644
@@ -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;
 }