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

Chen-Yu Tsai wenst at chromium.org
Mon Oct 24 15:05:31 PDT 2022


On Mon, Oct 24, 2022 at 3:23 AM AngeloGioacchino Del Regno
<angelogioacchino.delregno at collabora.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 at collabora.com>

Reviewed-by: Chen-Yu Tsai <wenst at chromium.org>



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