linux-kernel - Re: [PATCH 1/3] net: ti: icssg-prueth: Enable PTP timestamping support for SR1.0 devices

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Date: Sat, 1 Jun 2024 13:03:34 +0100
From: Simon Horman <horms@...nel.org>
To: Diogo Ivo <diogo.ivo@...mens.com>
Cc: MD Danish Anwar <danishanwar@...com>, Roger Quadros <rogerq@...nel.org>,
	"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>,
	Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
	Tero Kristo <kristo@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] net: ti: icssg-prueth: Enable PTP timestamping
 support for SR1.0 devices

On Wed, May 29, 2024 at 05:05:10PM +0100, Diogo Ivo wrote:
> Enable PTP support for AM65x SR1.0 devices by registering with the IEP
> infrastructure in order to expose a PTP clock to userspace.
> 
> Signed-off-by: Diogo Ivo <diogo.ivo@...mens.com>
> ---
>  drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c | 49 +++++++++++++++++++++++-
>  1 file changed, 48 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
> index 7b3304bbd7fc..01cad01965dc 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
> @@ -1011,16 +1011,42 @@ static int prueth_probe(struct platform_device *pdev)
>  	dev_dbg(dev, "sram: pa %llx va %p size %zx\n", prueth->msmcram.pa,
>  		prueth->msmcram.va, prueth->msmcram.size);
>  
> +	prueth->iep0 = icss_iep_get_idx(np, 0);
> +	if (IS_ERR(prueth->iep0)) {
> +		ret = dev_err_probe(dev, PTR_ERR(prueth->iep0), "iep0 get failed\n");

Hi Diogo,

A minor nit from my side.
No need to address this unless there will be a v2 for some other reason.

Networking still prefers code to be 80 columns wide or less.
It looks like that can be trivially achieved here.

Flagged by checkpatch.pl --max-line-length=80


> +		goto free_pool;
> +	}
> +
> +	prueth->iep1 = icss_iep_get_idx(np, 1);
> +	if (IS_ERR(prueth->iep1)) {
> +		ret = dev_err_probe(dev, PTR_ERR(prueth->iep1), "iep1 get failed\n");

Likewise, here.

> +		goto put_iep0;
> +	}

...