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From: =?UTF-8?q?Cs=C3=B3k=C3=A1s=2C=20Bence?= <csokas.bence@prolan.hu>
To: <imx@lists.linux.dev>, <netdev@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
CC: =?UTF-8?q?Cs=C3=B3k=C3=A1s=2C=20Bence?= <csokas.bence@prolan.hu>, Wei Fang
	<wei.fang@nxp.com>, Shenwei Wang <shenwei.wang@nxp.com>, Clark Wang
	<xiaoning.wang@nxp.com>, "David S. Miller" <davem@davemloft.net>, "Eric
 Dumazet" <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni
	<pabeni@redhat.com>
Subject: [PATCH v2] net: fec: Add ECR bit macros, fix FEC_ECR_EN1588 being cleared on link-down
Date: Fri, 7 Jun 2024 10:18:55 +0200
Message-ID: <20240607081855.132741-1-csokas.bence@prolan.hu>
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FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which
makes all 1588 functionality shut down on link-down. However, some
functionality needs to be retained (e.g. PPS) even without link.

Signed-off-by: "Csókás, Bence" <csokas.bence@prolan.hu>
---
 drivers/net/ethernet/freescale/fec_main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 881ece735dcf..fb19295529a2 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1361,6 +1361,12 @@ fec_stop(struct net_device *ndev)
 		writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL);
 		writel(rmii_mode, fep->hwp + FEC_R_CNTRL);
 	}
+
+	if (fep->bufdesc_ex) {
+		val = readl(fep->hwp + FEC_ECNTRL);
+		val |= FEC_ECR_EN1588;
+		writel(val, fep->hwp + FEC_ECNTRL);
+	}
 }
 
 static void
-- 
2.34.1