Messages in this thread | | | Date | Wed, 18 Dec 2013 19:33:09 +0800 | From | bilhuang <> | Subject | Re: [PATCH v3 2/2] cpufreq: tegra: Re-model Tegra cpufreq driver |
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On 12/18/2013 07:11 PM, Viresh Kumar wrote: > On 17 December 2013 16:22, bilhuang <bilhuang@nvidia.com> wrote: >> Tegra20 DVFS is a little bit complicated due to the fact that we can't scale >> VDD_CPU directly, there are constraints or relationship to other power rails >> so I don't think it is a good idea to use generic cpufreq-cpu0 driver if >> we're going to support voltage scaling. > > But why can't we handle that in a CPU specific regulator code? > cpufreq-cpu0 driver will call regulator_set_voltage_tol() directly according to the pre-defined OPP freq/volt pairs, the regulator drivers could be shared by other SoC so is not suitable to handle this, or do I misunderstand?
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