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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2019-10-25 09:30:55 +0200
committerVinod Koul <vkoul@kernel.org>2019-11-05 18:00:28 +0100
commit115b60a93ee4e29e103c4bf067aeab45c6d51725 (patch)
tree14a177bf2248833de564ab9e213be1fc1a53e01a /Documentation/devicetree/bindings/dma
parentdt-bindings: dmaengine: dma-common: Change dma-channel-mask to uint32-array (diff)
downloadlinux-115b60a93ee4e29e103c4bf067aeab45c6d51725.tar.xz
linux-115b60a93ee4e29e103c4bf067aeab45c6d51725.zip
dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA
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> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20191025073056.25450-3-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/dma')
-rw-r--r--Documentation/devicetree/bindings/dma/ti-edma.txt8
1 files changed, 8 insertions, 0 deletions
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 {