netdev - [RFC PATCH net-next 0/2] net: phy: Extend sysfs to adjust PHY latency.

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Date:   Tue, 19 Apr 2022 10:37:02 +0200
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <andrew@...n.ch>, <hkallweit1@...il.com>, <linux@...linux.org.uk>,
        <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <UNGLinuxDriver@...rochip.com>, <richardcochran@...il.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [RFC PATCH net-next 0/2] net: phy: Extend sysfs to adjust PHY latency.

The previous try of setting the PHY latency was here[1]. But this approach
could not work for multiple reasons:
- the interface was not generic enough so it would be hard to be extended
  in the future
- if there were multiple time stamper in the system then it was not clear
  to which one should adjust these values.

So the next try is to extend sysfs and configure exactly the desired PHY.
Therefore add a new entry in sysfs for the PHY('adjust_latency') which
will be shown only if the PHY implements the set/get_adj_latency.

[1] https://lore.kernel.org/netdev/20220401093909.3341836-1-horatiu.vultur@microchip.com/

Horatiu Vultur (2):
  net: phy: Add phy latency adjustment support in phy framework.
  net: phy: micrel: Implement set/get_adj_latency for lan8814

 .../ABI/testing/sysfs-class-net-phydev        | 10 +++
 drivers/net/phy/micrel.c                      | 87 +++++++++++++++++++
 drivers/net/phy/phy_device.c                  | 58 +++++++++++++
 include/linux/phy.h                           |  9 ++
 4 files changed, 164 insertions(+)

-- 
2.33.0