bcm4908: backport BCM4908 integrated switch initial support

Upstream driver supports bridging ports. There is no support for
crossbar setup or CPU port(s) yet.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 30 insertions, 0 deletions

diff --git a/target/linux/bcm4908/patches-5.4/070-v5.10-0002-net-dsa-b53-Print-err-message-on-SW_RST-timeout.patch b/target/linux/bcm4908/patches-5.4/070-v5.10-0002-net-dsa-b53-Print-err-message-on-SW_RST-timeout.patch
new file mode 100644
index 0000000000..ab00e58c0f
--- /dev/null
+++ b/target/linux/bcm4908/patches-5.4/070-v5.10-0002-net-dsa-b53-Print-err-message-on-SW_RST-timeout.patch
@@ -0,0 +1,30 @@
+From 434d2312cd8057aa6972f2b39aa0b359d02af9f4 Mon Sep 17 00:00:00 2001
+From: Paul Barker <pbarker@konsulko.com>
+Date: Thu, 3 Sep 2020 12:26:21 +0100
+Subject: [PATCH] net: dsa: b53: Print err message on SW_RST timeout
+
+This allows us to differentiate between the possible failure modes of
+b53_switch_reset() by looking at the dmesg output.
+
+Signed-off-by: Paul Barker <pbarker@konsulko.com>
+Acked-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_common.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -740,8 +740,11 @@ static int b53_switch_reset(struct b53_d
+ 			usleep_range(1000, 2000);
+ 		} while (timeout-- > 0);
+ 
+-		if (timeout == 0)
++		if (timeout == 0) {
++			dev_err(dev->dev,
++				"Timeout waiting for SW_RST to clear!\n");
+ 			return -ETIMEDOUT;
++		}
+ 	}
+ 
+ 	b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);