linux-kernel - Re: [PATCH v2 2/2] clk: samsung: exynos850: Implement CMU

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Message-ID: <CAPLW+4m5X5LK0TLbzo40c4JC+Be21rgr_0Qck2=FsRGRVeHQnw@mail.gmail.com>
Date:   Sat, 20 Nov 2021 18:54:27 +0200
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Sylwester Nawrocki <snawrocki@...nel.org>
Cc:     Sumit Semwal <sumit.semwal@...aro.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Subject: Re: [PATCH v2 2/2] clk: samsung: exynos850: Implement CMU_APM domain

On Sat, 20 Nov 2021 at 14:26, Sylwester Nawrocki <snawrocki@...nel.org> wrote:
>
> On 23.10.2021 00:45, Sam Protsenko wrote:
> > CMU_APM clock domain provides clocks for APM IP-core (Active Power
> > Management). According to Exynos850 TRM, CMU_APM generates I3C, Mailbox,
> > Speedy, Timer, WDT, RTC and PMU clocks for BLK_ALIVE.
> >
> > This patch adds next clocks:
> >    - bus clocks in CMU_TOP needed for CMU_APM
> >    - all internal CMU_APM clocks
> >    - leaf clocks for I3C, Speedy and RTC IP-cores
> >    - bus clocks for CMU_CMGP and CMU_CHUB
> >
> > CMU_APM doesn't belong to Power Domains, but platform driver is used for
> > its registration to keep its bus clock always running. Otherwise rtc-s3c
> > driver disables that clock and system freezes.
> >
> > Signed-off-by: Sam Protsenko<semen.protsenko@...aro.org>
> > Reviewed-by: Krzysztof Kozlowski<krzysztof.kozlowski@...onical.com>
> > ---
> > Changes in v2:
> >    - Reworked clock IDs to be contiguous (don't break ABI)
> >    - Added R-b tag by Krzysztof Kozlowski
> >
> >   drivers/clk/samsung/clk-exynos850.c   | 142 +++++++++++++++++++++++++-
>
> >   include/dt-bindings/clock/exynos850.h |  29 +++++-
>
> Looks good, could you just resend with the DT binding header changes moved
> to the first patch?
>

Thanks, will do.

> Regards,
> Sylwester