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dt-bindings: net: ar803x: add disable-hibernation-mode propetry 

The hibernation mode of Atheros AR803x PHYs defaults to be
enabled after hardware reset. When the cable is unplugged,
the PHY will enter hibernation mode after about 10 seconds
and the PHY clocks will be stopped to save power.
However, some MACs need the phy output clock for proper
functioning of their logic. For instance, stmmac needs the
RX_CLK of PHY for software reset to complete.
Therefore, add a DT property to configure the PHY to disable
this hardware hibernation mode.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Wei Fang 2022-08-18 11:00:53 +08:00 committed by Jakub Kicinski
parent fb8d784b53
commit 2e7f089914
1 changed files with 8 additions and 0 deletions
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Documentation/devicetree/bindings/net/qca,ar803x.yaml
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@ -40,6 +40,14 @@ properties:
Only supported on the AR8031.
type: boolean
qca,disable-hibernation-mode:
description: |
Disable Atheros AR803X PHYs hibernation mode. If present, indicates
that the hardware of PHY will not enter power saving mode when the
cable is disconnected. And the RX_CLK always keeps outputting a
valid clock.
type: boolean
qca,smarteee-tw-us-100m:
description: EEE Tw parameter for 100M links.
$ref: /schemas/types.yaml#/definitions/uint32