linux-kernel - Re: [PATCH v6 0/3] PCI: Precision Time Measurement support

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Message-ID: <20160719211926.GB17840@localhost>
Date:	Tue, 19 Jul 2016 16:19:26 -0500
From:	Bjorn Helgaas <helgaas@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Jonathan Yong <jonathan.yong@...el.com>, linux-pci@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/3] PCI: Precision Time Measurement support

On Mon, Jun 13, 2016 at 02:05:26PM -0500, Bjorn Helgaas wrote:
> This is a slightly different proposal for the PTM support Jonathan
> proposed here:
> 
>   http://lkml.kernel.org/r/1462956446-27361-2-git-send-email-jonathan.yong@intel.com
> 
> I split this into three pieces mostly for ease in reviewing.  They
> could all be squashed:
> 
>   - Enable PTM in root ports and switches automatically at boot
>   - Enable PTM in endpoints when requested by driver
>   - Add clock granularity information
> 
> I have some open questions about how PTM works on Root Complex
> Integrated Endpoints and whether we should enable it automatically
> even without a driver request.  And I probably left out some details
> of the clock granularity computation, so treat this as more of an RFC
> than anything.
> 
> Bjorn
> 
> ---
> 
> Bjorn Helgaas (2):
>       PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints
>       PCI: Add PTM clock granularity information
> 
> Jonathan Yong (1):
>       PCI: Add Precision Time Measurement (PTM) support

Jonathan, any comments?