linux-kernel - RE: [PATCH v2 2/4] opp: add API which get max freq by voltage

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Message-ID: <20190401023047epcms1p888e2dba45fcbc1de98d71d8a37acb976@epcms1p8>
Date:   Mon, 01 Apr 2019 11:30:47 +0900
From:   MyungJoo Ham <myungjoo.ham@...sung.com>
To:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>
CC:     "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "srv_heupstream@...iatek.com" <srv_heupstream@...iatek.com>,
        "fan.chen@...iatek.com" <fan.chen@...iatek.com>,
        "Andrew-sh.Cheng" <andrew-sh.cheng@...iatek.com>
Subject: RE: [PATCH v2 2/4] opp: add API which get max freq by voltage

>This API will get voltage as input parameter.
>Search all opp items for the item which with max frequency,
>and the voltae is smaller than provided voltage.
>
>Signed-off-by: Andrew-sh.Cheng <andrew-sh.cheng@...iatek.com>
>---
> drivers/opp/core.c     | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/pm_opp.h |  8 ++++++++
> 2 files changed, 63 insertions(+)
>
>diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
>index 24c757a..57deef9 100644
>--- a/include/linux/pm_opp.h
>+++ b/include/linux/pm_opp.h
>@@ -102,6 +102,8 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
> 
> struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
> 					      unsigned long *freq);
>+struct dev_pm_opp *dev_pm_opp_find_max_freq_by_volt(struct device *dev,
>+					      unsigned long u_volt);

For the symmetricity, wouldn't it be better to name it
dev_pm_opp_find_volt_ceiling(dev, u_volt); ?

Cheers,
MyungJoo