linux-kernel - Re: [PATCH v2 3/4] soc: qcom: smem: Support reserved-memory description

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Message-ID: <YV4TKh3XJYGOpGM3@robh.at.kernel.org>
Date:   Wed, 6 Oct 2021 16:20:42 -0500
From:   Rob Herring <robh@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Chris Lew <clew@...eaurora.org>,
        Deepak Kumar Singh <deesin@...eaurora.org>
Subject: Re: [PATCH v2 3/4] soc: qcom: smem: Support reserved-memory
 description

On Thu, Sep 30, 2021 at 11:21:10AM -0700, Bjorn Andersson wrote:
> Practically all modern Qualcomm platforms has a single reserved-memory
> region for SMEM. So rather than having to describe SMEM in the form of a
> node with a reference to a reserved-memory node, allow the SMEM device
> to be instantiated directly from the reserved-memory node.
> 
> The current means of falling back to dereferencing the "memory-region"
> is kept as a fallback, if it's determined that the SMEM node is a
> reserved-memory node.
> 
> The "qcom,smem" compatible is added to the reserved_mem_matches list, to
> allow the reserved-memory device to be probed.
> 
> In order to retain the readability of the code, the resolution of
> resources is split from the actual ioremapping.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 
> Changes since v1:
> - None
> 
>  drivers/of/platform.c   |  1 +

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

>  drivers/soc/qcom/smem.c | 57 ++++++++++++++++++++++++++++-------------
>  2 files changed, 40 insertions(+), 18 deletions(-)