linux-kernel - Re: [PATCH V4 06/13] soc: mediatek: add MT8183 dvfsrc support

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Message-ID: <1585795691.27527.14.camel@mtksdaap41>
Date:   Thu, 2 Apr 2020 10:48:11 +0800
From:   Henry Chen <henryc.chen@...iatek.com>
To:     Georgi Djakov <georgi.djakov@...aro.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Ryan Case <ryandcase@...omium.org>,
        Mark Brown <broonie@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Nicolas Boichat <drinkcat@...gle.com>,
        Fan Chen <fan.chen@...iatek.com>,
        James Liao <jamesjj.liao@...iatek.com>,
        Arvin Wang <arvin.wang@...iatek.com>,
        "Mike Turquette" <mturquette@...aro.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <srv_heupstream@...iatek.com>
Subject: Re: [PATCH V4 06/13] soc: mediatek: add MT8183 dvfsrc support

Hi Georgi,

On Wed, 2020-04-01 at 17:41 +0300, Georgi Djakov wrote:
> Hi Henry,
> 
> On 3/13/20 11:34, Henry Chen wrote:
> > Add dvfsrc driver for MT8183
> > 
> > Signed-off-by: Henry Chen <henryc.chen@...iatek.com>
> > ---
> >  drivers/soc/mediatek/Kconfig      |  15 ++
> >  drivers/soc/mediatek/Makefile     |   1 +
> >  drivers/soc/mediatek/mtk-dvfsrc.c | 434 ++++++++++++++++++++++++++++++++++++++
> >  include/soc/mediatek/mtk_dvfsrc.h |  30 +++
> >  4 files changed, 480 insertions(+)
> >  create mode 100644 drivers/soc/mediatek/mtk-dvfsrc.c
> >  create mode 100644 include/soc/mediatek/mtk_dvfsrc.h
> > 
> > diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
> > index f837b3c..44808f4 100644
> > --- a/drivers/soc/mediatek/Kconfig
> > +++ b/drivers/soc/mediatek/Kconfig
> > @@ -16,6 +16,21 @@ config MTK_CMDQ
> >  	  time limitation, such as updating display configuration during the
> >  	  vblank.
> >  
> > +config MTK_DVFSRC
> > +	bool "MediaTek DVFSRC Support"
> > +	depends on ARCH_MEDIATEK
> > +	default ARCH_MEDIATEK
> > +	select MTK_INFRACFG
> > +	select PM_GENERIC_DOMAINS if PM
> > +	depends on MTK_SCPSYS
> > +	help
> > +	  Say yes here to add support for the MediaTek DVFSRC (dynamic voltage
> > +	  and frequency scaling resource collector) found
> > +	  on different MediaTek SoCs. The DVFSRC is a proprietary
> > +	  hardware which is used to collect all the requests from
> > +	  system and turn into the decision of minimum Vcore voltage
> > +	  and minimum DRAM frequency to fulfill those requests.
> > +
> >  config MTK_PMIC_WRAP
> >  	tristate "MediaTek PMIC Wrapper Support"
> >  	depends on RESET_CONTROLLER
> > diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
> > index 2b2c2537..84182f0 100644
> > --- a/drivers/soc/mediatek/Makefile
> > +++ b/drivers/soc/mediatek/Makefile
> > @@ -1,4 +1,5 @@
> >  # SPDX-License-Identifier: GPL-2.0-only
> >  obj-$(CONFIG_MTK_CMDQ) += mtk-cmdq-helper.o
> > +obj-$(CONFIG_MTK_DVFSRC) += mtk-dvfsrc.o
> >  obj-$(CONFIG_MTK_PMIC_WRAP) += mtk-pmic-wrap.o
> >  obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
> > diff --git a/drivers/soc/mediatek/mtk-dvfsrc.c b/drivers/soc/mediatek/mtk-dvfsrc.c
> > new file mode 100644
> > index 0000000..85b3572
> > --- /dev/null
> > +++ b/drivers/soc/mediatek/mtk-dvfsrc.c
> > @@ -0,0 +1,434 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (C) 2018 MediaTek Inc.
> > + */
> > +#include <linux/arm-smccc.h>
> > +#include <linux/clk.h>
> > +#include <linux/io.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/module.h>
> > +#include <linux/notifier.h>
> > +#include <linux/of_device.h>
> > +#include <linux/platform_device.h>
> > +#include <soc/mediatek/mtk_dvfsrc.h>
> > +#include <soc/mediatek/mtk_sip.h>
> > +#include <dt-bindings/power/mt8183-power.h>
> 
> Looks like this depends on a header which is not part of this patch-set.
> It would be nice to list any dependencies in the cover letter.
> 
> Thanks,
> Georgi

I disregarded to list here. Thanks for your friendly reminder.