git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-23 05:56:14 -04:00
Code Issues Packages Projects Releases Wiki Activity

net: ethernet: fec: Allow the MDIO preamble to be disabled

Browse Source 
An MDIO transaction normally starts with 32 1s as a preamble. However
not all devices requires such a preamble. Add a device tree property
which allows the preamble to be suppressed. This will half the size of
the MDIO transaction, allowing faster transactions. But it should only
be used when all devices on the bus support suppressed preamble.

Suggested-by: Chris Healy <Chris.Healy@zii.aero>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2020-04-20 00:04:02 +02:00
committed by David S. Miller
parent 3e782985cb
commit 3c01eb62d1
2 changed files with 14 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/devicetree/bindings/net/mdio.yaml
View File

@@ -45,6 +45,12 @@ properties:
defined 2.5MHz should only be used when all devices on the bus support
the given clock speed.
suppress-preamble:
description:
The 32 bit preamble should be suppressed. In order for this to
work, all devices on the bus must support suppressed preamble.
type: boolean
patternProperties:
"^ethernet-phy@[0-9a-f]+$":
type: object