linux-kernel - [PATCH v2] net: fec: Add ECR bit macros, fix FEC_ECR

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Message-ID: 
 <PH0PR18MB4474DC325887DE80C1A2D7F0DEFB2@PH0PR18MB4474.namprd18.prod.outlook.com>
Date: Fri, 7 Jun 2024 08:32:48 +0000
From: Hariprasad Kelam <hkelam@...vell.com>
To: Csókás, Bence <csokas.bence@...lan.hu>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>,
        "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
CC: Wei Fang <wei.fang@....com>, Shenwei Wang <shenwei.wang@....com>,
        Clark
 Wang <xiaoning.wang@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric
 Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni
	<pabeni@...hat.com>
Subject: [PATCH v2] net: fec: Add ECR bit macros, fix FEC_ECR_EN1588 being
 cleared on link-down

> FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which makes
> all 1588 functionality shut down on link-down. However, some functionality
> needs to be retained (e.g. PPS) even without link.
> 


    Since this patch is targeted for net, please add fixes tag.


Thanks,
Hariprasad k
> Signed-off-by: "Csókás, Bence" <csokas.bence@...lan.hu>
> ---
>  drivers/net/ethernet/freescale/fec_main.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/ethernet/freescale/fec_main.c
> b/drivers/net/ethernet/freescale/fec_main.c
> index 881ece735dcf..fb19295529a2 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -1361,6 +1361,12 @@ fec_stop(struct net_device *ndev)
>  		writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL);
>  		writel(rmii_mode, fep->hwp + FEC_R_CNTRL);
>  	}
> +
> +	if (fep->bufdesc_ex) {
> +		val = readl(fep->hwp + FEC_ECNTRL);
> +		val |= FEC_ECR_EN1588;
> +		writel(val, fep->hwp + FEC_ECNTRL);
> +	}
>  }
> 
>  static void
> --
> 2.34.1
> 
>