linux-kernel - Re: [PATCH v2 7/7] phy: phy-mtk-tphy: fix the phy type setting issue

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Date:   Thu, 8 Sep 2022 09:27:00 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>
CC:     Kishon Vijay Abraham I <kishon@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski@...onical.com>,
        Eddie Hung <eddie.hung@...iatek.com>
Subject: Re: [PATCH v2 7/7] phy: phy-mtk-tphy: fix the phy type setting issue

On Wed, 2022-08-31 at 10:31 +0200, AngeloGioacchino Del Regno wrote:
> Il 29/08/22 10:08, Chunfeng Yun ha scritto:
> > The PHY type is not set if the index is non zero, prepare type
> > value according to the index, like as mask value.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> 
> I agree with this change and I'd be happy to give you my R-b tag, but
> this
> commit clearly needs to be backported, so you need a Fixes tag, or a
> Cc to stable.
A good point, will add it in next version, thanks a lot

> 
> Thanks,
> Angelo
> 
> > ---
> > v2: no changes
> > ---
> >   drivers/phy/mediatek/phy-mtk-tphy.c | 7 ++++---
> >   1 file changed, 4 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
> > b/drivers/phy/mediatek/phy-mtk-tphy.c
> > index e0f227a0d3cc..cc10298bc70d 100644
> > --- a/drivers/phy/mediatek/phy-mtk-tphy.c
> > +++ b/drivers/phy/mediatek/phy-mtk-tphy.c
> > @@ -915,7 +915,7 @@ static int phy_type_syscon_get(struct
> > mtk_phy_instance *instance,
> >   static int phy_type_set(struct mtk_phy_instance *instance)
> >   {
> >   	int type;
> > -	u32 mask;
> > +	u32 offset;
> >   
> >   	if (!instance->type_sw)
> >   		return 0;
> > @@ -938,8 +938,9 @@ static int phy_type_set(struct mtk_phy_instance
> > *instance)
> >   		return 0;
> >   	}
> >   
> > -	mask = RG_PHY_SW_TYPE << (instance->type_sw_index *
> > BITS_PER_BYTE);
> > -	regmap_update_bits(instance->type_sw, instance->type_sw_reg,
> > mask, type);
> > +	offset = instance->type_sw_index * BITS_PER_BYTE;
> > +	regmap_update_bits(instance->type_sw, instance->type_sw_reg,
> > +			   RG_PHY_SW_TYPE << offset, type << offset);
> >   
> >   	return 0;
> >   }
> > 
> 
>