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

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Message-ID: <9a7abae0-e31e-6beb-74ce-96462d847a88@collabora.com>
Date:   Wed, 31 Aug 2022 10:31:25 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.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

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.

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;
>   }
>