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Message-ID: <Y/JpGT206/0r/jF5@oden.dyn.berto.se>
Date:   Sun, 19 Feb 2023 19:23:21 +0100
From:   Niklas Söderlund <niklas.soderlund@...natech.se>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     rafael@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
        Len Brown <lenb@...nel.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Raju Rangoju <rajur@...lsio.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Ido Schimmel <idosch@...dia.com>,
        Petr Machata <petrm@...dia.com>,
        Gregory Greenman <gregory.greenman@...el.com>,
        Kalle Valo <kvalo@...nel.org>,
        Sebastian Reichel <sre@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Amit Kucheria <amitk@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Markus Mayer <mmayer@...adcom.com>,
        Support Opensource <support.opensource@...semi.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Thara Gopinath <thara.gopinath@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Yangtao Li <tiny.windzz@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Talel Shenhar <talel@...zon.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Keerthy <j-keerthy@...com>,
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        Masami Hiramatsu <mhiramat@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        ye xingchen <ye.xingchen@....com.cn>,
        Zheng Yongjun <zhengyongjun3@...wei.com>,
        Tim Zimmermann <tim@...ux4.de>,
        Yang Li <yang.lee@...ux.alibaba.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        Jiang Jian <jiangjian@...rlc.com>,
        Daniel Golle <daniel@...rotopia.org>,
        Balsam CHIHI <bchihi@...libre.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Mikko Perttunen <mperttunen@...dia.com>,
        "open list:ACPI THERMAL DRIVER" <linux-acpi@...r.kernel.org>,
        "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" 
        <linux-ide@...r.kernel.org>,
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        "open list:HARDWARE MONITORING" <linux-hwmon@...r.kernel.org>,
        "open list:IIO SUBSYSTEM AND DRIVERS" <linux-iio@...r.kernel.org>,
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        <linux-sunxi@...ts.linux.dev>,
        "open list:INPUT (KEYBOARD, MOUSE, JOYSTICK, TOUCHSCREEN)..." 
        <linux-input@...r.kernel.org>,
        "open list:CXGB4 ETHERNET DRIVER (CXGB4)" <netdev@...r.kernel.org>,
        "open list:INTEL WIRELESS WIFI LINK (iwlwifi)" 
        <linux-wireless@...r.kernel.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
        "open list:RENESAS R-CAR THERMAL DRIVERS" 
        <linux-renesas-soc@...r.kernel.org>,
        "open list:ARM/Rockchip SoC support" 
        <linux-rockchip@...ts.infradead.org>,
        "open list:SAMSUNG THERMAL DRIVER" 
        <linux-samsung-soc@...r.kernel.org>,
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        <linux-omap@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v1 01/17] thermal/core: Add a thermal zone 'devdata'
 accessor

On 2023-02-19 18:07:36 +0100, Daniel Lezcano wrote:
> On 19/02/2023 16:07, Niklas Söderlund wrote:
> > Hi Daniel,
> > 
> > Thanks for your work.
> > 
> > On 2023-02-19 15:36:41 +0100, Daniel Lezcano wrote:
> > > The thermal zone device structure is exposed to the different drivers
> > > and obviously they access the internals while that should be
> > > restricted to the core thermal code.
> > > 
> > > In order to self-encapsulate the thermal core code, we need to prevent
> > > the drivers accessing directly the thermal zone structure and provide
> > > accessor functions to deal with.
> > > 
> > > Provide an accessor to the 'devdata' structure and make use of it in
> > > the different drivers.
> > > 
> > > No functional changes intended.
> > > 
> > > Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> > > ---
> > 
> > ...
> > 
> > >   drivers/thermal/rcar_gen3_thermal.c              |  4 ++--
> > >   drivers/thermal/rcar_thermal.c                   |  3 +--
> > 
> > For R-Car,
> > 
> > Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
> > 
> > ...
> > 
> > 
> > > diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> > > index 2bb4bf33f4f3..724b95662da9 100644
> > > --- a/include/linux/thermal.h
> > > +++ b/include/linux/thermal.h
> > > @@ -365,6 +365,8 @@ thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int
> > >   					void *, struct thermal_zone_device_ops *,
> > >   					struct thermal_zone_params *, int, int);
> > > +void *thermal_zone_device_get_data(struct thermal_zone_device *tzd);
> > > +
> > 
> > bikeshedding:
> > 
> > Would it make sens to name this thermal_zone_device_get_priv_data(),
> > thermal_zone_device_get_priv() or something like that? To make it more
> > explicitly when reading the driver code this fetches the drivers private
> > data, and not some data belonging to the zone itself.
> 
> In the headers files, there are more occurrences with _name_priv():
> 
> # _name_priv()
> git grep priv include/linux/ | grep "priv(" | grep -v get | wc -l
> 52
> 
> # _name_private()
> git grep priv include/linux/ | grep "private(" | grep -v get | wc -l
> 33
> 
> # _name_get_private()
> git grep priv include/linux/ | grep "private(" | grep get | wc -l
> 12
> 
> # _name_get_priv()
> git grep priv include/linux/ | grep "priv(" | grep get | wc -l
> 4
> 
> 
> What about thermal_zone_device_priv() ?

Looks good to me.

> 
> 
> 
> 
> 
> 
> -- 
> <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
> 
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> 

-- 
Kind Regards,
Niklas Söderlund

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