linux-kernel - Re: [PATCH 04/10] clk: mediatek: mt8183: Drop flags for sys/univpll fixed factors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAGXv+5Gx0PHQdfrtrUicioP1VxuRd4U24PZV2kFLus_OyrP7fw@mail.gmail.com>
Date:   Mon, 24 Oct 2022 15:05:31 -0700
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     sboyd@...nel.org, mturquette@...libre.com, matthias.bgg@...il.com,
        miles.chen@...iatek.com, nfraprado@...labora.com,
        rex-bc.chen@...iatek.com, chun-jie.chen@...iatek.com,
        jose.exposito89@...il.com, yangyingliang@...wei.com,
        msp@...libre.com, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/10] clk: mediatek: mt8183: Drop flags for sys/univpll
 fixed factors

On Mon, Oct 24, 2022 at 3:23 AM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> The syspll and univpll clocks are used as clock sources for multiple
> peripherals of different kind, some of which are critical (like AXIs);
> a rate change on any of these two will produce a rate change on many
> devices and that's likely to produce system instability if not done
> correctly: this is the reason why we have (a lot of) "fixed factor"
> sys/univpll divider clocks, used by MUX clocks to provide different
> rates based on PLL output dividers.
>
> Following what was done on clk-mt8186-topckgen and also solving the
> same GPU DVFS issue, drop CLK_SET_RATE_PARENT from the aforementioned
> clocks.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>