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

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Message-ID: <4220e681-80b6-f9af-ddd1-b28aabe513cf@linaro.org>
Date:   Wed, 1 Apr 2020 17:41:49 +0300
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     Henry Chen <henryc.chen@...iatek.com>
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 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