[PATCH v2 1/2] arm64: dts: ti: k3-am65-main: Add ICSSG MDIO nodes

[Suman Anna]

From: Roger Quadros <rogerq at ti.com>

The ICSSGs on K3 AM65x SoCs contain an MDIO controller that can
be used to control external PHYs associated with the Industrial
Ethernet peripherals within each ICSSG instance. The MDIO module
used within the ICSSG is similar to the MDIO Controller used
in TI Davinci SoCs. A bus frequency of 1 MHz is chosen for the
MDIO operations.

The nodes are added and enabled in the common k3-am65-main.dtsi
file by default, and disabled in the existing AM65 board dts
files. These nodes need pinctrl lines, and so should be enabled
only on boards where they are actually wired and pinned out for
ICSSG Ethernet. Any new board dts file should disable these if
they are not sure.

Signed-off-by: Roger Quadros <rogerq at ti.com>
[s-anna at ti.com: move the disabled status to board dts files]
Signed-off-by: Suman Anna <s-anna at ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko at ti.com>
Acked-by: Jan Kiszka <jan.kiszka at siemens.com>
---
 .../boot/dts/ti/k3-am65-iot2050-common.dtsi   | 12 ++++++++
 arch/arm64/boot/dts/ti/k3-am65-main.dtsi      | 30 +++++++++++++++++++
 .../arm64/boot/dts/ti/k3-am654-base-board.dts | 12 ++++++++
 3 files changed, 54 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
index d90abda1de84..8c6b538c53f3 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
@@ -702,3 +702,15 @@ &mailbox0_cluster10 {
 &mailbox0_cluster11 {
 	status = "disabled";
 };
+
+&icssg0_mdio {
+	status = "disabled";
+};
+
+&icssg1_mdio {
+	status = "disabled";
+};
+
+&icssg2_mdio {
+	status = "disabled";
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index f97fc00c00ca..e679394d0b7e 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -1052,6 +1052,16 @@ tx_pru0_1: txpru at c000 {
 			reg-names = "iram", "control", "debug";
 			firmware-name = "am65x-txpru0_1-fw";
 		};
+
+		icssg0_mdio: mdio at 32400 {
+			compatible = "ti,davinci_mdio";
+			reg = <0x32400 0x100>;
+			clocks = <&k3_clks 62 3>;
+			clock-names = "fck";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			bus_freq = <1000000>;
+		};
 	};
 
 	icssg1: icssg at b100000 {
@@ -1183,6 +1193,16 @@ tx_pru1_1: txpru at c000 {
 			reg-names = "iram", "control", "debug";
 			firmware-name = "am65x-txpru1_1-fw";
 		};
+
+		icssg1_mdio: mdio at 32400 {
+			compatible = "ti,davinci_mdio";
+			reg = <0x32400 0x100>;
+			clocks = <&k3_clks 63 3>;
+			clock-names = "fck";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			bus_freq = <1000000>;
+		};
 	};
 
 	icssg2: icssg at b200000 {
@@ -1314,5 +1334,15 @@ tx_pru2_1: txpru at c000 {
 			reg-names = "iram", "control", "debug";
 			firmware-name = "am65x-txpru2_1-fw";
 		};
+
+		icssg2_mdio: mdio at 32400 {
+			compatible = "ti,davinci_mdio";
+			reg = <0x32400 0x100>;
+			clocks = <&k3_clks 64 3>;
+			clock-names = "fck";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			bus_freq = <1000000>;
+		};
 	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
index 60e43fd7af12..fa057a85e833 100644
--- a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
@@ -539,3 +539,15 @@ &mcasp2 {
 &dss {
 	status = "disabled";
 };
+
+&icssg0_mdio {
+	status = "disabled";
+};
+
+&icssg1_mdio {
+	status = "disabled";
+};
+
+&icssg2_mdio {
+	status = "disabled";
+};
-- 
2.30.1