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net: fec: Fix FEC_ECR_EN1588 being cleared on link-down
[ Upstream commitc32fe1986f
] FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which makes all 1588 functionality shut down, and all the extended registers disappear, on link-down, making the adapter fall back to compatibility "dumb mode". However, some functionality needs to be retained (e.g. PPS) even without link. Fixes:6605b730c0
("FEC: Add time stamping code and a PTP hardware clock") Cc: Richard Cochran <richardcochran@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/netdev/5fa9fadc-a89d-467a-aae9-c65469ff5fe1@lunn.ch/ Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu> Reviewed-by: Wei Fang <wei.fang@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -1342,6 +1342,12 @@ fec_stop(struct net_device *ndev)
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writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL);
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writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL);
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writel(rmii_mode, fep->hwp + FEC_R_CNTRL);
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writel(rmii_mode, fep->hwp + FEC_R_CNTRL);
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}
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}
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if (fep->bufdesc_ex) {
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val = readl(fep->hwp + FEC_ECNTRL);
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val |= FEC_ECR_EN1588;
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writel(val, fep->hwp + FEC_ECNTRL);
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}
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}
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}
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static void
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static void
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