Add dma-channel-mask property in Tegra GPCDMA document.
The property would help to specify the channels to be used in
kernel and reserve few for the firmware. This was previously
achieved by limiting the channel number to 31 in the driver.
This is wrong and does not align with the hardware. Correct
this and set the max interrupts to 32.
Signed-off-by: Akhil R <[email protected]>
Acked-by: Thierry Reding <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
---
.../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
index c8894476b6ab..851bd50ee67f 100644
--- a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
+++ b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
@@ -39,7 +39,7 @@ properties:
Should contain all of the per-channel DMA interrupts in
ascending order with respect to the DMA channel index.
minItems: 1
- maxItems: 31
+ maxItems: 32
resets:
maxItems: 1
@@ -52,6 +52,9 @@ properties:
dma-coherent: true
+ dma-channel-mask:
+ maxItems: 1
+
required:
- compatible
- reg
@@ -60,6 +63,7 @@ required:
- reset-names
- "#dma-cells"
- iommus
+ - dma-channel-mask
additionalProperties: false
@@ -108,5 +112,6 @@ examples:
#dma-cells = <1>;
iommus = <&smmu TEGRA186_SID_GPCDMA_0>;
dma-coherent;
+ dma-channel-mask = <0xfffffffe>;
};
...
--
2.17.1