linux-kernel - Re: [PATCH] of: export of_find_next_cache

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Message-ID: <CAA8EJppCO-q=swYOH+O2fOdUDbNzd1yz9ZoTEBswV7RmvFJifA@mail.gmail.com>
Date:   Wed, 11 Oct 2023 15:59:21 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Frank Rowand <frowand.list@...il.com>,
        Ilia Lin <ilia.lin@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH] of: export of_find_next_cache_node() for modules

On Wed, 11 Oct 2023 at 15:52, Rob Herring <robh+dt@...nel.org> wrote:
>
> On Wed, Oct 11, 2023 at 6:27 AM Dmitry Baryshkov
> <dmitry.baryshkov@...aro.org> wrote:
> >
> > The qcom-cpufreq-nvmem module uses of_find_next_cache_node() function,
> > so export it to be available to the modules.
>
> You really should be using the cacheinfo API which has already parsed
> the cache nodes.
>
> Also, why do you need a platform_device? I don't see a driver.
> cacheinfo already creates a struct device, so kind of weird to have 2
> devices.

The driver is pending as a part of the series at [1]. We need to scale
the L2 supplies and clock frequency following the core frequency
changes.

[1] https://lore.kernel.org/linux-arm-msm/20230827115033.935089-9-dmitry.baryshkov@linaro.org/

-- 
With best wishes
Dmitry