linux-kernel - Re: [PATCH] opp: Add API for getting voltage from supplies

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Date:   Thu, 13 Dec 2018 18:36:52 +0800
From:   Nick Fan <nick.fan@...iatek.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
CC:     Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        "Stephen Boyd" <sboyd@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <tfiga@...omium.org>,
        <Chiawen.Lee@...iatek.com>, <erin.lo@...iatek.com>
Subject: Re: [PATCH] opp: Add API for getting voltage from supplies

On Thu, 2018-12-13 at 12:08 +0530, Viresh Kumar wrote:
> On 10-12-18, 20:36, Nick Fan wrote:
> > For the users who only use one supply, they can use
> > dev_pm_opp_get_voltage to get the voltage data from an opp.
> > But if the users who use more than one supply, they will need this API
> > to get their voltage data from OPP.
> > The users should know about the supply count while creating opp table by
> > using dev_pm_opp_set_regulators function.
> > By using this API, the users can get the voltages by using index to
> > specify which supplies they want.
> > 
> > The following is a simple example to get multiple regulators by this
> > API.
> > for (i = 0; i < regulator_num; i++)
> > 	target_volt[i] = dev_pm_opp_get_voltage_supply(opp, i);
> 
> Fair enough. I couldn't find anything wrong with the patch. Will it be
> possible to send this patch as part of a series which uses the new API
> ? So that we are sure of somebody using it eventually.
> 
This new API is suitable for the users that required to access for
multiple regulators. And I am one of users who uses this API, but I am
not able to upstream the GPU kernel driver which uses the new API.

--
Nick Fan