linux-kernel - RE: [PATCH V12 3/5] thermal: imx_sc: add i.MX system controller thermal support

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Date:   Thu, 16 May 2019 10:46:33 +0000
From:   Anson Huang <anson.huang@....com>
To:     Aisheng Dong <aisheng.dong@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        "rui.zhang@...el.com" <rui.zhang@...el.com>,
        "edubezval@...il.com" <edubezval@...il.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        Daniel Baluta <daniel.baluta@....com>,
        Peng Fan <peng.fan@....com>,
        "heiko@...ech.de" <heiko@...ech.de>,
        "horms+renesas@...ge.net.au" <horms+renesas@...ge.net.au>,
        "agross@...nel.org" <agross@...nel.org>,
        "olof@...om.net" <olof@...om.net>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "jagan@...rulasolutions.com" <jagan@...rulasolutions.com>,
        "enric.balletbo@...labora.com" <enric.balletbo@...labora.com>,
        "marc.w.gonzalez@...e.fr" <marc.w.gonzalez@...e.fr>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V12 3/5] thermal: imx_sc: add i.MX system controller
 thermal support



> -----Original Message-----
> From: Aisheng Dong
> Sent: Thursday, May 16, 2019 6:40 PM
> To: Anson Huang <anson.huang@....com>; robh+dt@...nel.org;
> mark.rutland@....com; shawnguo@...nel.org; s.hauer@...gutronix.de;
> kernel@...gutronix.de; festevam@...il.com; catalin.marinas@....com;
> will.deacon@....com; rui.zhang@...el.com; edubezval@...il.com;
> daniel.lezcano@...aro.org; ulf.hansson@...aro.org; Daniel Baluta
> <daniel.baluta@....com>; Peng Fan <peng.fan@....com>;
> heiko@...ech.de; horms+renesas@...ge.net.au; agross@...nel.org;
> olof@...om.net; bjorn.andersson@...aro.org; jagan@...rulasolutions.com;
> enric.balletbo@...labora.com; marc.w.gonzalez@...e.fr;
> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; linux-pm@...r.kernel.org
> Cc: dl-linux-imx <linux-imx@....com>
> Subject: RE: [PATCH V12 3/5] thermal: imx_sc: add i.MX system controller
> thermal support
> 
> [...]
> 
> > > > +		if (!sensor)
> > > > +			return -ENOMEM;
> > > > +
> > > > +		ret = thermal_zone_of_get_sensor_id(child,
> > > > +						    &sensor_specs,
> > >
> > > It looks a bit strange why need sensor_specs as you even did not use it.
> >
> > It is because parsing the phandle arguments needs it, such as the
> > thermal_zone_of_sensor_register() function needs this pointer to be
> > passed back to check the elements are valid or NOT, so the API does
> > NOT define it as local structure. The API NOT just return the sensor
> > id, but also the of_phandle_args address, although we do NOT need it at all
> here.
> 
> The main problem is this one introduced in 2/5 which needs get ack from
> maintainer.
> For me, I would suggest to make sensor_specs transparent to user if it's
> really not needed by users.
> 
> Please try to make it either optional or hide to core users as well.
> And I guess the later one is doable after a glance at the core code.

OK, I will hide it to user if no other different comments.

Anson.

> 
> Regards
> Dong Aisheng