Richard
On 5/14/20 3:09 AM, Ricard Wanderlof wrote:
On Wed, 13 May 2020, Dan Murphy wrote:
Add a device tree property to configure the PDM sampling edge for each
digital microphone.
CC: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
---
.../devicetree/bindings/sound/tlv320adcx140.yaml | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
b/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
index ab2268c0ee67..55668c7d261d 100644
--- a/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
+++ b/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
@@ -63,6 +63,19 @@ properties:
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1, 2]
+ ti,pdm-edge-select:
+ description: |
+ Defines the sampling edge configuration for the PDM inputs. This is
an
+ array defined as <PDMIN1 PDMIN2 PDMIN3 PDMIN4>. 0 (default) is
negative
+ sampling edge and 1 is positive sampling edge.
A bit of a nitpick, but I would think of the edges as
negative-going/positive-going, or rising/falling. Not sure if anyone would
misunderstand 'negative edge' in practice though.
I will re-write the description to be more descriptive.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32-array
+ - minItems: 1
+ maxItems: 4
+ items:
+ maximum: 1
+ default: [0, 0, 0, 0]
+
required:
- compatible
- reg
@@ -77,6 +90,7 @@ examples:
compatible = "ti,tlv320adc5140";
reg = <0x4c>;
ti,mic-bias-source = <6>;
+ ti,pdm-edge-select = < 0 1 0 1>;
Should there really be a space between < and 0 ?
I will remove the space
Dan
/Ricard
