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net: phy: Add c45_phy_ids sysfs directory entry

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The phy_id field only shows the PHY ID of the C22 device, and the C45
device did not store its PHY ID in this field.

Add a new phy_mmd_group, and export the mmd<n>_device_id for the C45
device. These files are invisible to the C22 device.

Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250613131903.2961-1-yajun.deng@linux.dev
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Yajun Deng
2025-06-13 21:19:03 +08:00
committed by Paolo Abeni
parent 9149a63288
commit 170e4e3944
2 changed files with 120 additions and 2 deletions
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10
Documentation/ABI/testing/sysfs-class-net-phydev
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@@ -26,6 +26,16 @@ Description:
This ID is used to match the device with the appropriate
driver.
What: /sys/class/mdio_bus/<bus>/<device>/c45_phy_ids/mmd<n>_device_id
Date: June 2025
KernelVersion: 6.17
Contact: netdev@vger.kernel.org
Description:
This attribute contains the 32-bit PHY Identifier as reported
by the device during bus enumeration, encoded in hexadecimal.
These C45 IDs are used to match the device with the appropriate
driver. These files are invisible to the C22 device.
What: /sys/class/mdio_bus/<bus>/<device>/phy_interface
Date: February 2014
KernelVersion: 3.15