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Subject: [RFC PATCH net-next 20/22] net: dsa: mt7530: force link-down on MACs before reset on MT7530
Date:   Fri, 21 Apr 2023 17:36:46 +0300
Message-Id: <20230421143648.87889-21-arinc.unal@arinc9.com>
In-Reply-To: <20230421143648.87889-1-arinc.unal@arinc9.com>
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From: Arınç ÜNAL <arinc.unal@arinc9.com>

Force link-down on all MACs before internal reset. Let's follow suit commit
728c2af6ad8c ("net: mt7531: ensure all MACs are powered down before
reset").

Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 drivers/net/dsa/mt7530.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index ac1e3c58aaac..8ece3d0d820c 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2203,6 +2203,10 @@ mt7530_setup(struct dsa_switch *ds)
 		return -EINVAL;
 	}
 
+	/* Force link-down on all MACs before internal reset */
+	for (i = 0; i < MT7530_NUM_PORTS; i++)
+		mt7530_write(priv, MT7530_PMCR_P(i), PMCR_FORCE_LNK);
+
 	/* Reset the switch through internal reset */
 	mt7530_write(priv, MT7530_SYS_CTRL,
 		     SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |
-- 
2.37.2