linux-kernel - RE: [PATCH net-next v3 3/3] net: fec: make PPS channel configurable

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Message-ID:
 <PAXPR04MB8510516B636E2935AA2FCDAC88852@PAXPR04MB8510.eurprd04.prod.outlook.com>
Date: Mon, 12 Aug 2024 02:37:40 +0000
From: Wei Fang <wei.fang@....com>
To: Francesco Dolcini <francesco@...cini.it>, 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>, Richard Cochran
	<richardcochran@...il.com>
CC: Francesco Dolcini <francesco.dolcini@...adex.com>, "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>, Frank Li
	<frank.li@....com>, Rafael Beims <rafael.beims@...adex.com>
Subject: RE: [PATCH net-next v3 3/3] net: fec: make PPS channel configurable

> -----Original Message-----
> From: Francesco Dolcini <francesco@...cini.it>
> Sent: 2024年8月9日 17:48
> To: 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>;
> Richard Cochran <richardcochran@...il.com>
> Cc: Francesco Dolcini <francesco.dolcini@...adex.com>; imx@...ts.linux.dev;
> netdev@...r.kernel.org; linux-kernel@...r.kernel.org; Frank Li
> <frank.li@....com>; Rafael Beims <rafael.beims@...adex.com>
> Subject: [PATCH net-next v3 3/3] net: fec: make PPS channel configurable
> 
> From: Francesco Dolcini <francesco.dolcini@...adex.com>
> 
> Depending on the SoC where the FEC is integrated into the PPS channel might
> be routed to different timer instances. Make this configurable from the
> devicetree.
> 
> When the related DT property is not present fallback to the previous default
> and use channel 0.
> 
> Reviewed-by: Frank Li <Frank.Li@....com>
> Tested-by: Rafael Beims <rafael.beims@...adex.com>
> Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> ---
> v3: added net-next subject prefix
> v2: add Reviewed|Tested-by
> ---
>  drivers/net/ethernet/freescale/fec_ptp.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/fec_ptp.c
> b/drivers/net/ethernet/freescale/fec_ptp.c
> index 25f988b9c7cf..2e05083cbf29 100644
> --- a/drivers/net/ethernet/freescale/fec_ptp.c
> +++ b/drivers/net/ethernet/freescale/fec_ptp.c
> @@ -529,8 +529,6 @@ static int fec_ptp_enable(struct ptp_clock_info *ptp,
>  	unsigned long flags;
>  	int ret = 0;
> 
> -	fep->pps_channel = DEFAULT_PPS_CHANNEL;
> -
>  	if (rq->type == PTP_CLK_REQ_PPS) {
>  		fep->reload_period = PPS_OUPUT_RELOAD_PERIOD;
> 
> @@ -712,12 +710,16 @@ void fec_ptp_init(struct platform_device *pdev, int
> irq_idx)  {
>  	struct net_device *ndev = platform_get_drvdata(pdev);
>  	struct fec_enet_private *fep = netdev_priv(ndev);
> +	struct device_node *np = fep->pdev->dev.of_node;
nit
struct device_node *np = pdev->dev.of_node;

>  	int irq;
>  	int ret;
> 
>  	fep->ptp_caps.owner = THIS_MODULE;
>  	strscpy(fep->ptp_caps.name, "fec ptp", sizeof(fep->ptp_caps.name));
> 
> +	fep->pps_channel = DEFAULT_PPS_CHANNEL;
> +	of_property_read_u32(np, "fsl,pps-channel", &fep->pps_channel);
> +
>  	fep->ptp_caps.max_adj = 250000000;
>  	fep->ptp_caps.n_alarm = 0;
>  	fep->ptp_caps.n_ext_ts = 0;
> --
> 2.39.2