linux-kernel - Re: [PATCH net-next v2 1/3] net: ti: icssg-prueth: Enable PTP timestamping support for SR1.0 devices

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Date: Tue, 4 Jun 2024 16:19:31 +0200
From: Wojciech Drewek <wojciech.drewek@...el.com>
To: Diogo Ivo <diogo.ivo@...mens.com>, 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>, Jacob Keller <jacob.e.keller@...el.com>,
	Simon Horman <horms@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH net-next v2 1/3] net: ti: icssg-prueth: Enable PTP
 timestamping support for SR1.0 devices



On 04.06.2024 15:15, 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.
> 
> Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
> Signed-off-by: Diogo Ivo <diogo.ivo@...mens.com>
> ---

Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>

>  drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c | 51 +++++++++++++++++++++++-
>  1 file changed, 50 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..fa98bdb11ece 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
> @@ -1011,16 +1011,44 @@ 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");
> +		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");
> +		goto put_iep0;
> +	}
> +
> +	ret = icss_iep_init(prueth->iep0, NULL, NULL, 0);
> +	if (ret) {
> +		dev_err_probe(dev, ret, "failed to init iep0\n");
> +		goto put_iep;
> +	}
> +
> +	ret = icss_iep_init(prueth->iep1, NULL, NULL, 0);
> +	if (ret) {
> +		dev_err_probe(dev, ret, "failed to init iep1\n");
> +		goto exit_iep0;
> +	}
> +
>  	if (eth0_node) {
>  		ret = prueth_netdev_init(prueth, eth0_node);
>  		if (ret) {
>  			dev_err_probe(dev, ret, "netdev init %s failed\n",
>  				      eth0_node->name);
> -			goto free_pool;
> +			goto exit_iep;
>  		}
>  
>  		if (of_find_property(eth0_node, "ti,half-duplex-capable", NULL))
>  			prueth->emac[PRUETH_MAC0]->half_duplex = 1;
> +
> +		prueth->emac[PRUETH_MAC0]->iep = prueth->iep0;
>  	}
>  
>  	if (eth1_node) {
> @@ -1033,6 +1061,8 @@ static int prueth_probe(struct platform_device *pdev)
>  
>  		if (of_find_property(eth1_node, "ti,half-duplex-capable", NULL))
>  			prueth->emac[PRUETH_MAC1]->half_duplex = 1;
> +
> +		prueth->emac[PRUETH_MAC1]->iep = prueth->iep1;
>  	}
>  
>  	/* register the network devices */
> @@ -1091,6 +1121,19 @@ static int prueth_probe(struct platform_device *pdev)
>  		prueth_netdev_exit(prueth, eth_node);
>  	}
>  
> +exit_iep:
> +	icss_iep_exit(prueth->iep1);
> +exit_iep0:
> +	icss_iep_exit(prueth->iep0);
> +
> +put_iep:
> +	icss_iep_put(prueth->iep1);
> +
> +put_iep0:
> +	icss_iep_put(prueth->iep0);
> +	prueth->iep0 = NULL;
> +	prueth->iep1 = NULL;
> +
>  free_pool:
>  	gen_pool_free(prueth->sram_pool,
>  		      (unsigned long)prueth->msmcram.va, msmc_ram_size);
> @@ -1138,6 +1181,12 @@ static void prueth_remove(struct platform_device *pdev)
>  		prueth_netdev_exit(prueth, eth_node);
>  	}
>  
> +	icss_iep_exit(prueth->iep1);
> +	icss_iep_exit(prueth->iep0);
> +
> +	icss_iep_put(prueth->iep1);
> +	icss_iep_put(prueth->iep0);
> +
>  	gen_pool_free(prueth->sram_pool,
>  		      (unsigned long)prueth->msmcram.va,
>  		      MSMC_RAM_SIZE_SR1);
>