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arm64: dts: ls1028a: fix ENETC PTP clock input 

[ Upstream commit d0570a575a ]

On the LS1028A the ENETC reference clock is connected to 4th HWA output,
see Figure 7 "Clock subsystem block diagram".

The PHC may run with a wrong frequency. ptp_qoriq_auto_config() will read
the clock speed of the clock given in the device tree. It is likely that,
on the reference board this wasn't noticed because both clocks have the
same frequency. But this must not be always the case. Fix it.

Fixes: 49401003e2 ("arm64: dts: fsl: ls1028a: add ENETC 1588 timer node")
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Michael Walle 2020-11-08 19:51:05 +01:00 committed by Greg Kroah-Hartman
parent a85f3e7cb7
commit a554b68baf
1 changed files with 1 additions and 1 deletions
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arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
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@ -673,7 +673,7 @@
ethernet@0,4 {
compatible = "fsl,enetc-ptp";
reg = <0x000400 0 0 0 0>;
clocks = <&clockgen 4 0>;
clocks = <&clockgen 2 3>;
little-endian;
};
};