netdev - Re: [PATCH v1 3/4] net: fec: make PPS channel configurable

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Message-ID: <48d37621-13d4-42e0-8cd2-c4b031149b1e@beims.me>
Date: Wed, 7 Aug 2024 17:40:06 -0300
From: Rafael Beims <rafael@...ms.me>
To: Francesco Dolcini <francesco@...cini.it>, 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
Subject: Re: [PATCH v1 3/4] net: fec: make PPS channel configurable

On 07/08/2024 11:43, Francesco Dolcini wrote:
> 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.
>
> Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> ---
>   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 6f0f8bf61752..8e17fd0c8e6d 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;
>   	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;
Tested-by: rafael.beims@...adex.com