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Re: [PATCH v2 1/4] nvmem: rockchip-efuse: Change initcall to subsys

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Heiko Stuebner <heiko@sntech.de> writes:

> Am Donnerstag, 18. August 2016, 13:28:58 CEST schrieb Kevin Hilman:
>> Finlye Xiao <finley.xiao@rock-chips.com> writes:
>> > From: Finley Xiao <finley.xiao@rock-chips.com>
>> > 
>> > We will register a cpufreq notifier for adjusting opp's voltage, and it
>> > need to fetch cpu's leakage from efuse in the notifier_call. so the efuse
>> > driver should probe before cpufreq driver.
>> > 
>> > Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
>> 
>> Why can't this be handled with deferred probling?  initcall ordering is
>> a can of worms.
>
> I think the issue is less between efuse and avs driver, but more between avs 
> driver and cpufreq. The avs driver aims to modify the opp table and thus wants 
> to do that / register the notifier before cpufreq starts.
>
> And as there is no direct connection between cpufreq and the avs driver, 
> making cpufreq defer probing is probably not really easy.

Thanks for the explanation.

Sounds like something that belongs in the changelog.

Kevin

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[PATCH v2 0/4] PM / AVS: add Rockchip cpu avs Finlye Xiao <finley.xiao@rock-chips.com> - 2016-08-18 11:00 +0200
  [PATCH v2 2/4] of: introduce of_property_read_s32_index Finlye Xiao <finley.xiao@rock-chips.com> - 2016-08-18 11:10 +0200
  [PATCH v2 3/4] dt-bindings: add binding document for Rockchip cpu avs Finlye Xiao <finley.xiao@rock-chips.com> - 2016-08-18 11:10 +0200
  [PATCH v2 1/4] nvmem: rockchip-efuse: Change initcall to subsys Finlye Xiao <finley.xiao@rock-chips.com> - 2016-08-18 11:10 +0200
    Re: [PATCH v2 1/4] nvmem: rockchip-efuse: Change initcall to subsys Heiko Stuebner <heiko@sntech.de> - 2016-08-19 03:00 +0200
      Re: [PATCH v2 1/4] nvmem: rockchip-efuse: Change initcall to subsys Kevin Hilman <khilman@baylibre.com> - 2016-08-19 18:20 +0200
    Re: [PATCH v2 1/4] nvmem: rockchip-efuse: Change initcall to subsys Kevin Hilman <khilman@baylibre.com> - 2016-08-19 05:20 +0200

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