linux-kernel - Re: [RFC PATCH v1 5/6] soc/tegra: regulators: Add regulators coupler for Tegra20

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Message-ID: <9756d8ca-0778-5185-5b6b-3168d63819ec@gmail.com>
Date:   Wed, 8 May 2019 16:10:58 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v1 5/6] soc/tegra: regulators: Add regulators coupler
 for Tegra20

08.05.2019 10:57, Mark Brown пишет:
> On Sun, Apr 14, 2019 at 08:59:38PM +0300, Dmitry Osipenko wrote:
>> Add regulators coupler for Tegra20 SoC's that performs voltage balancing
>> of a coupled regulators and thus provides voltage scaling functionality.
> 
> Can you say what the rules that this is trying to follow are?
> 

There are three regulators: CPU, CORE and RTC.

Constraints:

1) CORE and RTC have max-spread voltage of 170mV.
2) CORE and RTC voltages must be higher than the CPU voltage by at least
120mV.