linux-kernel - Re: [PATCH v7 04/19] clk: mediatek: reset: Extract common drivers to update function

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Date:   Mon, 23 May 2022 13:08:52 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     "Nícolas F. R. A. Prado" <nfraprado@...labora.com>
CC:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <matthias.bgg@...il.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <p.zabel@...gutronix.de>,
        <angelogioacchino.delregno@...labora.com>,
        <chun-jie.chen@...iatek.com>, <wenst@...omium.org>,
        <runyang.chen@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH v7 04/19] clk: mediatek: reset: Extract common drivers
 to update function

On Fri, 2022-05-20 at 10:55 -0400, Nícolas F. R. A. Prado wrote:
> On Thu, May 19, 2022 at 08:55:12PM +0800, Rex-BC Chen wrote:
> > To make drivers more clear and readable, we extract common code
> > within assert and deassert to mtk_reset_update_set_clr() and
> > mtk_reset_update().
> > 
> > Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > ---
> >  drivers/clk/mediatek/reset.c | 38 +++++++++++++++++++++-----------
> > ----
> >  1 file changed, 22 insertions(+), 16 deletions(-)
> > 
> > diff --git a/drivers/clk/mediatek/reset.c
> > b/drivers/clk/mediatek/reset.c
> > index 5cbbcc22a4fc..22fa9f09752c 100644
> > --- a/drivers/clk/mediatek/reset.c
> > +++ b/drivers/clk/mediatek/reset.c
> > @@ -12,24 +12,27 @@
> >  
> >  #include "reset.h"
> >  
> > -static int mtk_reset_assert(struct reset_controller_dev *rcdev,
> > -			    unsigned long id)
> > +static int mtk_reset_update(struct reset_controller_dev *rcdev,
> > +			    unsigned long id, bool deassert)
> 
> I'd have called the bool 'assert', and then passed true on assert and
> false on
> deassert, as I think that's slightly more intuitive, but that's just
> personal
> preference. It's fine like this as well.
> 
> Thanks,
> Nícolas
> 

Hello Nícolas,

Thanks for your advice, but I think I will keep the original logic in
next version.

BRs,
Rex


> >  {
> >  	struct mtk_reset *data = container_of(rcdev, struct mtk_reset,
> > rcdev);
> > +	unsigned int val = deassert ? 0 : ~0;
> >  
> >  	return regmap_update_bits(data->regmap,
> >  				  data->regofs + ((id / 32) << 2),
> > -				  BIT(id % 32), ~0);
> > +				  BIT(id % 32), val);
> > +}
> > +
> > +static int mtk_reset_assert(struct reset_controller_dev *rcdev,
> > +			    unsigned long id)
> > +{
> > +	return mtk_reset_update(rcdev, id, false);
> >  }
> >  
> >  static int mtk_reset_deassert(struct reset_controller_dev *rcdev,
> >  			      unsigned long id)
> >  {
> > -	struct mtk_reset *data = container_of(rcdev, struct mtk_reset,
> > rcdev);
> > -
> > -	return regmap_update_bits(data->regmap,
> > -				  data->regofs + ((id / 32) << 2),
> > -				  BIT(id % 32), 0);
> > +	return mtk_reset_update(rcdev, id, true);
> >  }
> >  
> >  static int mtk_reset(struct reset_controller_dev *rcdev, unsigned
> > long id)
> > @@ -43,24 +46,27 @@ static int mtk_reset(struct
> > reset_controller_dev *rcdev, unsigned long id)
> >  	return mtk_reset_deassert(rcdev, id);
> >  }
> >  
> > -static int mtk_reset_assert_set_clr(struct reset_controller_dev
> > *rcdev,
> > -				    unsigned long id)
> > +static int mtk_reset_update_set_clr(struct reset_controller_dev
> > *rcdev,
> > +				    unsigned long id, bool deassert)
> >  {
> >  	struct mtk_reset *data = container_of(rcdev, struct mtk_reset,
> > rcdev);
> > +	unsigned int deassert_ofs = deassert ? 0x4 : 0;
> >  
> >  	return regmap_write(data->regmap,
> > -			    data->regofs + ((id / 32) << 4),
> > +			    data->regofs + ((id / 32) << 4) +
> > deassert_ofs,
> >  			    BIT(id % 32));
> >  }
> >  
> > +static int mtk_reset_assert_set_clr(struct reset_controller_dev
> > *rcdev,
> > +				    unsigned long id)
> > +{
> > +	return mtk_reset_update_set_clr(rcdev, id, false);
> > +}
> > +
> >  static int mtk_reset_deassert_set_clr(struct reset_controller_dev
> > *rcdev,
> >  				      unsigned long id)
> >  {
> > -	struct mtk_reset *data = container_of(rcdev, struct mtk_reset,
> > rcdev);
> > -
> > -	return regmap_write(data->regmap,
> > -			    data->regofs + ((id / 32) << 4) + 0x4,
> > -			    BIT(id % 32));
> > +	return mtk_reset_update_set_clr(rcdev, id, true);
> >  }
> >  
> >  static int mtk_reset_set_clr(struct reset_controller_dev *rcdev,
> > -- 
> > 2.18.0
> > 
> >