linux-kernel - Re: [RFC PATCH 0/2] Propose critical clocks

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Date:   Tue, 13 Sep 2022 20:24:47 +0800
From:   Peng Fan <peng.fan@....nxp.com>
To:     Marco Felsch <m.felsch@...gutronix.de>,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        abelvesa@...nel.org, abel.vesa@...aro.org, mturquette@...libre.com,
        sboyd@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com
Cc:     linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>,
        linux-imx@....com, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org
Subject: Re: [RFC PATCH 0/2] Propose critical clocks



On 9/13/2022 6:21 PM, Marco Felsch wrote:
> Hi,
> 
> this proposal is to mark clocks as critical. It is somehow inspired by
> the regulator-always-on property. Since sometimes we can end in circular
> dependcies if we wanna solve the dependcies for a specific clock
> provider.
> 
> The property is generic so it can be used by every hw clock provider. So
> it can be seen as generic implementation to [1].

Thanks for working on a generic solution, I think your proposal could 
also help [1] and try to resolve same issue as [2].


[1] 
https://lore.kernel.org/all/CAJ+vNU1Za2CPGVX3q4HKufsxbL5zRrk1B5CWFpKritetrTs4dA@mail.gmail.com/
[2] 
https://lore.kernel.org/all/20220517235919.200375-1-marex@denx.de/T/#m52d6d0831bf43d5f293e35cb27f3021f278d0564

Thanks,
Peng.


> 
> [1] https://lore.kernel.org/linux-clk/20220913092136.1706263-1-peng.fan@oss.nxp.com/
> 
> Marco Felsch (2):
>    clk: add support for critical always-on clocks
>    arm64: dts: imx8mm-evk: mark 32k pmic clock as always-on
> 
>   arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi |  1 +
>   drivers/clk/clk.c                             | 18 ++++++++++++++++++
>   2 files changed, 19 insertions(+)
>