linux-kernel - [PATCH net-next v6 19/25] net: dsa: qca8k: enlarge mdio delay and timeout

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Message-Id: <20210514210015.18142-20-ansuelsmth@gmail.com>
Date:   Fri, 14 May 2021 23:00:09 +0200
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Ansuel Smith <ansuelsmth@...il.com>
Subject: [PATCH net-next v6 19/25] net: dsa: qca8k: enlarge mdio delay and timeout

The witch require some extra delay after setting page or the next
read/write can use still use the old page. Add a delay after the
set_page function to address this as it's done in QSDK legacy driver.
Some timeouts were notice with VLAN and phy function, enlarge the
mdio busy wait timeout to fix these problems.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 drivers/net/dsa/qca8k.c | 1 +
 drivers/net/dsa/qca8k.h | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 1f8bfe0a78f4..df4cf6d75074 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -143,6 +143,7 @@ qca8k_set_page(struct mii_bus *bus, u16 page)
 	}
 
 	qca8k_current_page = page;
+	usleep_range(1000, 2000);
 	return 0;
 }
 
diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h
index a878486d9bcd..d365f85ab34f 100644
--- a/drivers/net/dsa/qca8k.h
+++ b/drivers/net/dsa/qca8k.h
@@ -20,7 +20,7 @@
 #define PHY_ID_QCA8337					0x004dd036
 #define QCA8K_ID_QCA8337				0x13
 
-#define QCA8K_BUSY_WAIT_TIMEOUT				20
+#define QCA8K_BUSY_WAIT_TIMEOUT				2000
 
 #define QCA8K_NUM_FDB_RECORDS				2048
 
-- 
2.30.2