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

[Wojciech Drewek]

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 at intel.com>
> Signed-off-by: Diogo Ivo <diogo.ivo at siemens.com>
> ---

Reviewed-by: Wojciech Drewek <wojciech.drewek at intel.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);
>