735-v5.14-19-net-dsa-qca8k-enlarge-mdio-delay-and-timeout.patch

From 617960d72e93de0f3fa52407e2d39e8c43e73b0a Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Fri, 14 May 2021 23:00:09 +0200
Subject: [PATCH] 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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/qca8k.c | 1 +
 drivers/net/dsa/qca8k.h | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -143,6 +143,7 @@ qca8k_set_page(struct mii_bus *bus, u16
 	}
 
 	qca8k_current_page = page;
+	usleep_range(1000, 2000);
 	return 0;
 }
 
--- 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