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| /openbmc/linux/arch/arm64/boot/dts/freescale/ |
| H A D | fsl-lx2160a-bluebox3.dts | 25501d8d Wed Oct 20 06:36:13 CDT 2021 Vladimir Oltean <vladimir.oltean@nxp.com> arm64: dts: lx2160abluebox3: update RGMII delays for sja1105 switch
In the new behavior, the sja1105 driver expects there to be explicit
RGMII delays present on the fixed-link ports, otherwise it will complain
that it falls back to legacy behavior, which is to apply RGMII delays
incorrectly derived from the phy-mode string.
In this case, the legacy behavior of the driver is to apply both RX and
TX delays. To preserve that, add explicit 2 nanosecond delays, which are
identical with what the driver used to add (a 90 degree phase shift).
The delays from the phy-mode are ignored by new kernels (it's still
RGMII as long as it's "rgmii*" something), and the explicit
{rx,tx}-internal-delay-ps properties are ignored by old kernels, so the
change works both ways.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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