From 37aef53f5ccf789a87006e0dcbce187ce3427f63 Mon Sep 17 00:00:00 2001 From: Stephan Gerhold Date: Mon, 18 Oct 2021 12:24:20 +0200 Subject: dt-bindings: dmaengine: bam_dma: Add "powered remotely" mode In some configurations, the BAM DMA controller is set up by a remote processor and the local processor can simply start making use of it without setting up the BAM. This is already supported using the "qcom,controlled-remotely" property. However, for some reason another possible configuration is that the remote processor is responsible for powering up the BAM, but we are still responsible for initializing it (e.g. resetting it etc). Add a "qcom,powered-remotely" property to describe that configuration. Signed-off-by: Stephan Gerhold Acked-by: Rob Herring Reviewed-by: Bhupesh Sharma Link: https://lore.kernel.org/r/20211018102421.19848-2-stephan@gerhold.net Signed-off-by: Vinod Koul --- Documentation/devicetree/bindings/dma/qcom_bam_dma.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt index cf5b9e44432c..6e9a5497b3f2 100644 --- a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt +++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt @@ -15,6 +15,8 @@ Required properties: the secure world. - qcom,controlled-remotely : optional, indicates that the bam is controlled by remote proccessor i.e. execution environment. +- qcom,powered-remotely : optional, indicates that the bam is powered up by + a remote processor but must be initialized by the local processor. - num-channels : optional, indicates supported number of DMA channels in a remotely controlled bam. - qcom,num-ees : optional, indicates supported number of Execution Environments -- cgit v1.2.3-59-g8ed1b