From: Rob Herring <robh@kernel.org>
To: Stephan Gerhold <stephan@gerhold.net>
Cc: devicetree@vger.kernel.org, Andy Gross <agross@kernel.org>,
~postmarketos/upstreaming@lists.sr.ht,
linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH v3 1/2] dt-bindings: dmaengine: bam_dma: Add "powered remotely" mode
Date: Mon, 18 Oct 2021 14:51:00 -0500 [thread overview]
Message-ID: <YW3QJJoprJgre/sg@robh.at.kernel.org> (raw)
In-Reply-To: <20211018102421.19848-2-stephan@gerhold.net>
On Mon, 18 Oct 2021 12:24:20 +0200, Stephan Gerhold wrote:
> 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 <stephan@gerhold.net>
> ---
> Changes in v3: None, split from BAM-DMUX patch set
> Changes since RFC:
> - Rename qcom,remote-power-collapse -> qcom,powered-remotely
> for consistency with "qcom,controlled-remotely"
>
> Also note that there is an ongoing effort to convert these bindings
> to DT schema but sadly there were not any updates for a while. :/
> https://lore.kernel.org/linux-arm-msm/20210519143700.27392-2-bhupesh.sharma@linaro.org/
> ---
> Documentation/devicetree/bindings/dma/qcom_bam_dma.txt | 2 ++
> 1 file changed, 2 insertions(+)
>
Acked-by: Rob Herring <robh@kernel.org>
next prev parent reply other threads:[~2021-10-18 19:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-18 10:24 [PATCH v3 0/2] dmaengine: qcom: bam_dma: Add "powered remotely" mode for BAM-DMUX Stephan Gerhold
2021-10-18 10:24 ` [PATCH v3 1/2] dt-bindings: dmaengine: bam_dma: Add "powered remotely" mode Stephan Gerhold
2021-10-18 19:51 ` Rob Herring [this message]
2021-10-18 10:24 ` [PATCH v3 2/2] dmaengine: qcom: " Stephan Gerhold
2021-10-25 5:48 ` [PATCH v3 0/2] dmaengine: qcom: bam_dma: Add "powered remotely" mode for BAM-DMUX Vinod Koul
2021-10-25 6:17 ` Stephan Gerhold
2021-10-28 6:50 ` Bhupesh Sharma
2021-10-28 7:15 ` Stephan Gerhold
2021-10-28 7:18 ` Bhupesh Sharma
2021-10-28 17:12 ` Vinod Koul
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