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>
---
v3 - Updated description to be more descriptive and fixed example.
.../bindings/sound/tlv320adcx140.yaml | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml b/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
index ab2268c0ee67..daa6cc0e031b 100644
--- a/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
+++ b/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml
@@ -63,6 +63,29 @@ properties:
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1, 2]
+ ti,pdm-edge-select:
+ description: |
+ Defines the PDMCLK sampling edge configuration for the PDM inputs. This
+ array is defined as <PDMIN1 PDMIN2 PDMIN3 PDMIN4>.
+
+ 0 - (default) Odd channel is latched on the negative edge and even
+ channel is latched on the the positive edge.
+ 1 - Odd channel is latched on the positive edge and even channel is
+ latched on the the negative edge.
+
+ PDMIN1 - PDMCLK latching edge used for channel 1 and 2 data
+ PDMIN2 - PDMCLK latching edge used for channel 3 and 4 data
+ PDMIN3 - PDMCLK latching edge used for channel 5 and 6 data
+ PDMIN4 - PDMCLK latching edge used for channel 7 and 8 data
+
+ 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 +100,7 @@ examples:
compatible = "ti,tlv320adc5140";
reg = <0x4c>;
ti,mic-bias-source = <6>;
+ ti,pdm-edge-select = <0 1 0 1>;
reset-gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
};
};
--
2.26.2
