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authorMaxime Ripard <maxime.ripard@bootlin.com>2019-05-24 15:57:59 +0300
committerMark Brown <broonie@kernel.org>2019-05-28 17:53:07 +0300
commiteb5b12843b067d685a8d7a191b928b07934b2d02 (patch)
tree7c8034b2514c2429d248b5778dc856bfcee0e8ea /Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml
parent0a0ca8e94ca36d2153c2fbea69a31f792bfc5831 (diff)
downloadlinux-eb5b12843b067d685a8d7a191b928b07934b2d02.tar.xz
dt-bindings: sound: sun4i-i2s: Document that the RX channel can be missing
The A83t and compatibles controllers don't have any reception capabilities on some instances of the controllers, even though it was never documented as such in the binding before. Therefore, on those controllers, we don't have the option to set an RX DMA channel. This was already done in the DTSI, but the binding itself was never updated. Let's add a special case in the schemas. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml')
-rw-r--r--Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml52
1 files changed, 42 insertions, 10 deletions
diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml
index 85b2d6d84055..eb3992138eec 100644
--- a/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-i2s.yaml
@@ -41,19 +41,11 @@ properties:
- const: apb
- const: mod
- dmas:
- items:
- - description: RX DMA Channel
- - description: TX DMA Channel
-
- dma-names:
- items:
- - const: rx
- - const: tx
-
# Even though it only applies to subschemas under the conditionals,
# not listing them here will trigger a warning because of the
# additionalsProperties set to false.
+ dmas: true
+ dma-names: true
resets:
maxItems: 1
@@ -72,6 +64,46 @@ allOf:
required:
- resets
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: allwinner,sun8i-a83t-i2s
+
+ then:
+ properties:
+ dmas:
+ minItems: 1
+ maxItems: 2
+ items:
+ - description: RX DMA Channel
+ - description: TX DMA Channel
+ description:
+ Some controllers cannot receive but can only transmit
+ data. In such a case, the RX DMA channel is to be omitted.
+
+ dma-names:
+ oneOf:
+ - items:
+ - const: rx
+ - const: tx
+ - const: tx
+ description:
+ Some controllers cannot receive but can only transmit
+ data. In such a case, the RX name is to be omitted.
+
+ else:
+ properties:
+ dmas:
+ items:
+ - description: RX DMA Channel
+ - description: TX DMA Channel
+
+ dma-names:
+ items:
+ - const: rx
+ - const: tx
+
required:
- "#sound-dai-cells"
- compatible