Messages in this thread | | | Date | Thu, 18 Aug 2022 03:20:02 +0200 | From | Andrew Lunn <> | Subject | Re: [PATCH net 1/2] dt: ar803x: Document disable-hibernation property |
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> Hi Andrew, > > Your suggestion is indeed an effective solution, but I checked both the datasheet > and the driver of AR803x PHYs and found that the qca,clk-out-frequency and the > qca,keep-pll-enabled properties are associated with the CLK_25M pin of AR803x PHYs. > But there is a case that CLK_25M pin is not used on some platforms. > Taking our i.MX8DXL platform as an example, the stmmac and AR8031 PHY are applied > on this platform, but the CLK_25M pin of AR8031 is not used. So when I used the method > you mentioned above, it did not work as expected. In this case, we can only disable the > hibernation mode of AR803x PHYs and keep the RX_CLK always outputting a valid clock > so that the stmmac can complete the software reset operation.
What happens to the RX_CLK when you unplug the cable? It is no longer receiving anything, so i would expect the RX_CLK to stop ticking. Does that cause problems for the MAC?
Andrew
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