linux-kernel - Re: [PATCH 2/2] irqchip: irq-qcom-mpm: Support passing a slice of SRAM as reg space

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Message-ID: <20230330015012.GC3590215@dragon>
Date:   Thu, 30 Mar 2023 09:50:12 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] irqchip: irq-qcom-mpm: Support passing a slice of
 SRAM as reg space

On Wed, Mar 29, 2023 at 03:30:12PM +0200, Konrad Dybcio wrote:
> > Otherwise, I do not understand why devm_ioremap_resource() cannot be
> > used.
> drivers/rpmsg/qcom_glink_rpm.c calls devm_ioremap on the entire
> RPM MSG RAM.

qcom_glink_rpm driver remaps the entire RPM MSG RAM, but it doesn't seem
to request any region.  So MPM can still call devm_ioremap_resource() on
its slice, no?

Shawn