linux-kernel - Re: [PATCH 4/5] clk: samsung: exynos7885: Add TREX clocks

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Message-ID: <a0d848eb-c312-ea66-c62f-b4bdb982a66a@linaro.org>
Date:   Thu, 2 Jun 2022 13:56:41 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     David Virag <virag.david003@...il.com>
Cc:     phone-devel@...r.kernel.org,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] clk: samsung: exynos7885: Add TREX clocks

On 02/06/2022 01:37, David Virag wrote:
> TREX D Core and P core clocks seem to be related to the BTS (Bus Traffic
> Shaper) inside the Exynos7885 SoC, and are needed for the SoC to
> function correctly.
> 
> When clocks are cut from TREX D Core, the eMMC and the framebuffer stops
> working properly. Other unknown things may stop working as well.
> 
> When clocks are cut from TREX P Core, the system locks up needing a hard
> reset.
> 
> Add these clocks and mark them critical so that they are always on.


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>


Best regards,
Krzysztof