linux-kernel - Re: [PATCH v5 14/24] clk: mediatek: Add MT8192 imp i2c wrapper clock support

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Date:   Wed, 18 Nov 2020 11:49:42 +0800
From:   Weiyi Lu <weiyi.lu@...iatek.com>
To:     Yingjoe Chen <yingjoe.chen@...iatek.com>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
        <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v5 14/24] clk: mediatek: Add MT8192 imp i2c wrapper
 clock support

On Wed, 2020-11-18 at 10:41 +0800, Yingjoe Chen wrote:
> On Mon, 2020-11-09 at 10:03 +0800, Weiyi Lu wrote:
> > Add MT8192 imp i2c wrapper clock provider
> > 
> > Signed-off-by: Weiyi Lu <weiyi.lu@...iatek.com>
> > ---
> >  drivers/clk/mediatek/Kconfig                   |   6 ++
> >  drivers/clk/mediatek/Makefile                  |   1 +
> >  drivers/clk/mediatek/clk-mt8192-imp_iic_wrap.c | 119 +++++++++++++++++++++++++
> >  3 files changed, 126 insertions(+)
> >  create mode 100644 drivers/clk/mediatek/clk-mt8192-imp_iic_wrap.c
> > 
> > diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
> > index eb549f8..8acc7d6 100644
> > --- a/drivers/clk/mediatek/Kconfig
> > +++ b/drivers/clk/mediatek/Kconfig
> > @@ -515,6 +515,12 @@ config COMMON_CLK_MT8192_IMGSYS
> >  	help
> >  	  This driver supports MediaTek MT8192 imgsys and imgsys2 clocks.
> >  
> > +config COMMON_CLK_MT8192_IMP_IIC_WRAP
> > +	bool "Clock driver for MediaTek MT8192 imp_iic_wrap"
> > +	depends on COMMON_CLK_MT8192
> > +	help
> > +	  This driver supports MediaTek MT8192 imp_iic_wrap clocks.
> > +
> >  config COMMON_CLK_MT8516
> >  	bool "Clock driver for MediaTek MT8516"
> >  	depends on ARCH_MEDIATEK || COMPILE_TEST
> 
> <...>
> 
> > +
> > +static struct platform_driver clk_mt8192_imp_iic_wrap_drv = {
> > +	.probe = mtk_clk_simple_probe,
> 
> Good to have this generic probe function. Now several mtk clk drivers
> are just a few data.
> 
> But this series still add >10 configs for mt8192 clock drivers. Why do
> we need separate configs for clocks of different domain? I don't think
> they need lots of resource. We should review the rationale and reduce
> the numbers. 
> 
Hi Joe,

Thanks for reviewing.

There have been some discussions in patch[1] as to why the subsystem
clocks are now separated by different configs.
And we do need these clocks to be optional on some MediatTek SoC
platform.

I thought it it now a rationale number of subsystem clock provider
drivers. In this series, we have reduced from 23 to 12.

[1]
https://patchwork.kernel.org/project/linux-mediatek/patch/1460621514-65191-5-git-send-email-jamesjj.liao@mediatek.com/


> 
> Joe.C
> 
>