diff mbox series

[v4,2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA

Message ID 20190930114055.29315-3-peter.ujfalusi@ti.com (mailing list archive)
State Accepted
Headers show
Series dmaengine: bindings/edma: dma-channel-mask to array | expand

Commit Message

Peter Ujfalusi Sept. 30, 2019, 11:40 a.m. UTC 
Similarly to paRAM slots, channels can be used by other cores.

The common dma-channel-mask property can be used for specifying the
available channels.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 Documentation/devicetree/bindings/dma/ti-edma.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Rob Herring (Arm) Oct. 1, 2019, 1:40 p.m. UTC | #1 
On Mon, 30 Sep 2019 14:40:54 +0300, Peter Ujfalusi wrote:
> Similarly to paRAM slots, channels can be used by other cores.
> 
> The common dma-channel-mask property can be used for specifying the
> available channels.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> ---
>  Documentation/devicetree/bindings/dma/ti-edma.txt | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
index 4bbc94d829c8..0e1398f93aa2 100644
--- a/Documentation/devicetree/bindings/dma/ti-edma.txt
+++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
@@ -42,6 +42,11 @@  Optional properties:
 - ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
 		the driver, they are allocated to be used by for example the
 		DSP. See example.
+- dma-channel-mask: Mask of usable channels.
+		Single uint32 for EDMA with 32 channels, array of two uint32 for
+		EDMA with 64 channels. See example and
+		Documentation/devicetree/bindings/dma/dma-common.yaml
+
 
 ------------------------------------------------------------------------------
 eDMA3 Transfer Controller
@@ -91,6 +96,9 @@  edma: edma@49000000 {
 	ti,edma-memcpy-channels = <20 21>;
 	/* The following PaRAM slots are reserved: 35-44 and 100-109 */
 	ti,edma-reserved-slot-ranges = <35 10>, <100 10>;
+	/* The following channels are reserved: 35-44 */
+	dma-channel-mask = <0xffffffff /* Channel 0-31 */
+			    0xffffe007>; /* Channel 32-63 */
 };
 
 edma_tptc0: tptc@49800000 {