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dt-bindings: ethernet-phy: add optional brr-mode flag

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There is a group of PHY chips supporting BroadR-Reach link modes in
a manner allowing for more or less identical register usage as standard
Clause 22 PHY.
These chips support standard Ethernet link modes as well, however, the
circuitry is mutually exclusive and cannot be auto-detected.
The link modes in question are 100Base-T1 as defined in IEEE802.3bw,
based on Broadcom's 1BR-100 link mode, and newly defined 10Base-T1BRR
(1BR-10 in Broadcom documents).

Add optional brr-mode flag to switch the PHY to BroadR-Reach mode.

Signed-off-by: Kamil Horák (2N) <kamilh@axis.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20240712150709.3134474-4-kamilh@axis.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kamil Horák (2N) 2024-07-12 17:07:08 +02:00 committed by Jakub Kicinski
parent ff253875ff
commit 775631d784
1 changed files with 8 additions and 0 deletions
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8
Documentation/devicetree/bindings/net/ethernet-phy.yaml
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@ -93,6 +93,14 @@ properties:
the turn around line low at end of the control phase of the
MDIO transaction.
brr-mode:
$ref: /schemas/types.yaml#/definitions/flag
description:
If set, indicates the network cable interface is an alternative one as
defined in the BroadR-Reach link mode specification under 1BR-100 and
1BR-10 names. The PHY must be configured to operate in BroadR-Reach mode
by software.
clocks:
maxItems: 1
description: