linux-kernel - RE: [PATCH 18/26] net: stmmac: add new switch to struct plat_stmmacenet

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Date:   Mon, 12 Jun 2023 09:49:53 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>, Vinod Koul <vkoul@...nel.org>,
        Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Jose Abreu <Jose.Abreu@...opsys.com>
Subject: RE: [PATCH 18/26] net: stmmac: add new switch to struct
 plat_stmmacenet_data

From: Bartosz Golaszewski <brgl@...ev.pl>
Date: Mon, Jun 12, 2023 at 10:23:47

> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> On some platforms, the PCS can be integrated in the MAC so the driver
> will not see any PCS link activity. Add a switch that allows the platform
> drivers to let the core code know.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
>  include/linux/stmmac.h                            | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index fa07b0d50b46..fdcf1684487c 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -5793,7 +5793,7 @@ static void stmmac_common_interrupt(struct stmmac_priv *priv)
>  		}
>  
>  		/* PCS link status */
> -		if (priv->hw->pcs) {
> +		if (priv->hw->pcs && !priv->plat->has_integrated_pcs) {
>  			if (priv->xstats.pcs_link)
>  				netif_carrier_on(priv->dev);
>  			else
> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
> index 225751a8fd8e..06090538fe2d 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -293,5 +293,6 @@ struct plat_stmmacenet_data {
>  	bool sph_disable;
>  	bool serdes_up_after_phy_linkup;
>  	const struct dwmac4_addrs *dwmac4_addrs;
> +	bool has_integrated_pcs;
>  };
>  #endif
> -- 
> 2.39.2

We should eventually consider changing some elements of this struct to a bit-field.

Reviewed-by: Jose Abreu <Jose.Abreu@...opsys.com>

Thanks,
Jose