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Date: Tue, 2 Dec 2025 22:21:00 +0000
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Subject: Re: [PATCH net-next 7/7] bnxt_en: Add PTP .getcrosststamp() interface
 to get device/host times
To: Michael Chan <michael.chan@broadcom.com>, davem@davemloft.net
Cc: netdev@vger.kernel.org, edumazet@google.com, kuba@kernel.org,
 pabeni@redhat.com, andrew+netdev@lunn.ch, pavan.chebbi@broadcom.com,
 andrew.gospodarek@broadcom.com, Somnath Kotur <somnath.kotur@broadcom.com>
References: <20251126215648.1885936-1-michael.chan@broadcom.com>
 <20251126215648.1885936-8-michael.chan@broadcom.com>
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From: Vadim Fedorenko <vadim.fedorenko@linux.dev>
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On 26/11/2025 21:56, Michael Chan wrote:

[...]

> +static int bnxt_ptp_getcrosststamp(struct ptp_clock_info *ptp_info,
> +				   struct system_device_crosststamp *xtstamp)
> +{
> +	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
> +						ptp_info);
> +
> +	if (!(ptp->bp->fw_cap & BNXT_FW_CAP_PTP_PTM))
> +		return -EOPNOTSUPP;

to have it enabled for x86-only (as the only supported platform as of
now), additional check is needed:

if (pcie_ptm_enabled(ptp->bp->pdev) && boot_cpu_has(X86_FEATURE_ART))
	return -EOPNOTSUPP;

> +	return get_device_system_crosststamp(bnxt_phc_get_syncdevicetime,
> +					     ptp, NULL, xtstamp);
> +}
> +