From: Tao Ren <rentao.bupt@xxxxxxxxx>
Enable mac3 controller in Elbert dts: Elbert MAC3 is connected to the
BCM53134P onboard switch's IMP_RGMII port directly (fixed link, no PHY
between BMC MAC and BCM53134P).
Note: BMC's mdio0 controller is connected to BCM53134P's MDIO interface
for debugging purposes only: BCM53134P always loads configurations from
its EEPROM, and users should not configure the switch via the MDIO
interface. As a result, the MDIO connection is disabled in dts.
Signed-off-by: Tao Ren <rentao.bupt@xxxxxxxxx>
---
Changes in v2:
- updated comments and patch description.
.../boot/dts/aspeed-bmc-facebook-elbert.dts | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/arm/boot/dts/aspeed-bmc-facebook-elbert.dts b/arch/arm/boot/dts/aspeed-bmc-facebook-elbert.dts
index 27b43fe099f1..36657d8fdb73 100644
--- a/arch/arm/boot/dts/aspeed-bmc-facebook-elbert.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-facebook-elbert.dts
@@ -183,3 +183,23 @@ imux31: i2c@7 {
&i2c11 {
status = "okay";
};
+
+/*
+ * BMC's "mac3" is connected to BCM53134P's IMP_RGMII port directly (no
+ * PHY in between).
+ * Although BMC's "mdio0" controller is connected to BCM53134P's MDIO
+ * interface, it's only for debugging purposes: BCM53134P always loads
+ * configurations from its EEPROM, and users should not configure the
+ * switch through MDIO interface in regular operations. As a result,
+ * the MDIO connection is disabled in dts.
+ */
+&mac3 {
+ status = "okay";
+ phy-mode = "rgmii";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_rgmii4_default>;
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+};
--
2.37.3
