1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/747-v5.16-07-dt-bindings-net-dsa-qca8k-Document-qca-sgmii-enable-.patch b/target/linux/generic/backport-5.15/747-v5.16-07-dt-bindings-net-dsa-qca8k-Document-qca-sgmii-enable-.patch
new file mode 100644
index 0000000000..8abd264e79
--- /dev/null
+++ b/target/linux/generic/backport-5.15/747-v5.16-07-dt-bindings-net-dsa-qca8k-Document-qca-sgmii-enable-.patch
@@ -0,0 +1,33 @@
+From 13ad5ccc093ff448b99ac7e138e91e78796adb48 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Thu, 14 Oct 2021 00:39:12 +0200
+Subject: dt-bindings: net: dsa: qca8k: Document qca,sgmii-enable-pll
+
+Document qca,sgmii-enable-pll binding used in the CPU nodes to
+enable SGMII PLL on MAC config.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ Documentation/devicetree/bindings/net/dsa/qca8k.txt | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+--- a/Documentation/devicetree/bindings/net/dsa/qca8k.txt
++++ b/Documentation/devicetree/bindings/net/dsa/qca8k.txt
+@@ -45,6 +45,16 @@ A CPU port node has the following option
+                                 Mostly used in qca8327 with CPU port 0 set to
+                                 sgmii.
+ - qca,sgmii-txclk-falling-edge: Set the transmit clock phase to falling edge.
++- qca,sgmii-enable-pll  : For SGMII CPU port, explicitly enable PLL, TX and RX
++                          chain along with Signal Detection.
++                          This should NOT be enabled for qca8327. If enabled with
++                          qca8327 the sgmii port won't correctly init and an err
++                          is printed.
++                          This can be required for qca8337 switch with revision 2.
++                          A warning is displayed when used with revision greater
++                          2.
++                          With CPU port set to sgmii and qca8337 it is advised
++                          to set this unless a communication problem is observed.
+ 
+ For QCA8K the 'fixed-link' sub-node supports only the following properties:
+