linux-kernel - Re: [PATCH 2/4] dmaengine: qcom: bam_dma: add num-channels binding for remotely controlled

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Message-ID: <20180129161913.z6wgnbxcrf4q2gpm@rob-hp-laptop>
Date:   Mon, 29 Jan 2018 10:19:13 -0600
From:   Rob Herring <robh@...nel.org>
To:     srinivas.kandagatla@...aro.org
Cc:     Vinod Koul <vinod.koul@...el.com>,
        Andy Gross <andy.gross@...aro.org>, dmaengine@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        David Brown <david.brown@...aro.org>,
        Dan Williams <dan.j.williams@...el.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        yanhe@...cinc.com, ramkri@....qualcomm.com, sdharia@...cinc.com
Subject: Re: [PATCH 2/4] dmaengine: qcom: bam_dma: add num-channels binding
 for remotely controlled

On Tue, Jan 16, 2018 at 07:02:34PM +0000, srinivas.kandagatla@...aro.org wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> 
> When Linux is master of BAM, it can directly read registers to know number
> of supported channels, however when its remotely controlled reading these
> registers would trigger a crash if the BAM is not yet intialized/powered up
> on the remote side.
> 
> This patch adds num-channels binding to specify number of supported
> dma channels on remotely controlled BAM.
> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  Documentation/devicetree/bindings/dma/qcom_bam_dma.txt |  2 ++

Reviewed-by: Rob Herring <robh@...nel.org>

>  drivers/dma/qcom/bam_dma.c                             | 13 +++++++++++--
>  2 files changed, 13 insertions(+), 2 deletions(-)