linux-kernel - Re: [PATCH RESEND v4] soc: samsung: Add simple voltage coupler for Exynos5800

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Message-ID: <20200616070254.GA20282@kozik-lap>
Date:   Tue, 16 Jun 2020 09:02:54 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Viresh Kumar <viresh.kumar@...aro.org>, peron.clem@...il.com,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        linux-samsung-soc@...r.kernel.org,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Saravana Kannan <saravanak@...gle.com>
Subject: Re: [PATCH RESEND v4] soc: samsung: Add simple voltage coupler for
 Exynos5800

On Tue, Jun 16, 2020 at 08:58:21AM +0200, Marek Szyprowski wrote:
> Add a simple custom voltage regulator coupler for Exynos5800 SoCs, which
> require coupling between "vdd_arm" and "vdd_int" regulators. This coupler
> ensures that the voltage values don't go below the bootloader-selected
> operation point during the boot process until a the clients sets their
> constraints. It is achieved by assuming minimal voltage value equal to
> the current value if no constraints are set. This also ensures proper
> voltage balancing if any of the client driver is missing.
> 
> The balancing code comes from the regulator/core.c with the additional
> logic for handling regulators without client constraints applied added.
> 
> Reviewed-by: Dmitry Osipenko <digetx@...il.com>

Thanks, applied.

Best regards,
Krzysztof