linux-kernel - Re: [PATCH 1/2] clk: samsung: exynos7885: Correct "div4" clock parents

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Message-ID: <033af024-8acd-e536-0c24-ff30b12a581b@linaro.org>
Date:   Fri, 24 Jun 2022 09:59:42 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     David Virag <virag.david003@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Sam Protsenko <semen.protsenko@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH 1/2] clk: samsung: exynos7885: Correct "div4" clock
 parents

On 26/05/2022 09:21, Krzysztof Kozlowski wrote:
> On 26/05/2022 07:58, David Virag wrote:
>> "div4" DIVs which divide PLLs by 4 are actually dividing "div2" DIVs by
>> 2 to achieve a by 4 division, thus their parents are the respective
>> "div2" DIVs. These DIVs were mistakenly set to have the PLLs as parents.
>> This leads to the kernel thinking "div4"s and everything under them run
>> at 2x the clock speed. Fix this.
>>
>> Fixes: 45bd8166a1d8 ("clk: samsung: Add initial Exynos7885 clock driver")
>> Signed-off-by: David Virag <virag.david003@...il.com>
>> ---
>>  drivers/clk/samsung/clk-exynos7885.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)

Sylwester,

This goes to v5.20?

Best regards,
Krzysztof