Re: [PATCH 5/8] thermal:cpu cooling:tegra: Provide deferred probing for tegra driver

From: Mikko Perttunen
Date: Mon Nov 17 2014 - 07:51:44 EST

On 11/17/2014 01:43 PM, Thierry Reding wrote:
On Fri, Nov 14, 2014 at 12:47:33PM +0200, Mikko Perttunen wrote:
Tested-by: Mikko Perttunen <mikko.perttunen@xxxxxxxx>

One potential issue I can see is that if the cpufreq driver fails to probe
then you'll never get the thermal driver either. For example, Tegra124
currently has no cpufreq driver, so if CONFIG_CPU_THERMAL was enabled, then
the soctherm driver would never be able to probe. But I don't really have a
solution for this either.

It doesn't seem like there's any code whatsoever to deal with cpufreq
within the soctherm driver, so deferring probe based on something we're
not using anyway seems rather useless.


My understanding is that there needs to be no code inside soctherm to handle it, as the cpufreq driver (cpufreq-dt) will register a cooling device that will then be bound to the soctherm sensors using the of-thermal device tree properties. At this moment, however, we don't have that cpufreq driver so this patch is still useless for Tegra.


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