ARM: dts: am4372: Add PRUSS MDIO controller node
The PRU-ICSS1 instance on AM437x SoCs has a MDIO sub-module that
can be used to control external PHYs associated with the Industrial
Ethernet peripherals within the PRUSS. The MDIO module used within
this PRU-ICSS is an instance of the MDIO Controller used in TI
Davinci SoCs. The same bus frequency of 1 MHz is chosen as the
regular MDIO node. Note that there is no MDIO node added to the
smaller PRU-ICSS0 instance as the MDIO pins are not pinned out.
The node is added and enabled in the common am4372.dtsi file by
default, and disabled in all the existing AM437x board dts files.
This node needs pinctrl lines, and so should be enabled only on
boards where they are actually wired and pinned out for PRUSS
Ethernet. Any new board dts file should disable these if they
are not sure.
Signed-off-by: Andrew F. Davis <afd@ti.com>
[s-anna@ti.com: fix reg address, add commit description]
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index 2200a09..61a1d88 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -511,6 +511,16 @@ pru1_1: pru@38000 {
reg-names = "iram", "control", "debug";
firmware-name = "am437x-pru1_1-fw";
};
+
+ pruss1_mdio: mdio@32400 {
+ compatible = "ti,davinci_mdio";
+ reg = <0x32400 0x90>;
+ clocks = <&dpll_core_m4_ck>;
+ clock-names = "fck";
+ bus_freq = <1000000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
};
pruss0: pruss@40000 {
diff --git a/arch/arm/boot/dts/am437x-cm-t43.dts b/arch/arm/boot/dts/am437x-cm-t43.dts
index a83f46e..5ce8e68 100644
--- a/arch/arm/boot/dts/am437x-cm-t43.dts
+++ b/arch/arm/boot/dts/am437x-cm-t43.dts
@@ -416,3 +416,7 @@ &cpu {
<600000 1100000>,
<300000 950000>;
};
+
+&pruss1_mdio {
+ status = "disabled";
+};
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index e267768..c2e4896 100644
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -1118,3 +1118,7 @@ &rtc {
&cpu {
cpu0-supply = <&dcdc2>;
};
+
+&pruss1_mdio {
+ status = "disabled";
+};
diff --git a/arch/arm/boot/dts/am437x-idk-evm.dts b/arch/arm/boot/dts/am437x-idk-evm.dts
index 2dc5255..53f64e3 100644
--- a/arch/arm/boot/dts/am437x-idk-evm.dts
+++ b/arch/arm/boot/dts/am437x-idk-evm.dts
@@ -537,3 +537,7 @@ opp100-600000000 {
opp-suspend;
};
};
+
+&pruss1_mdio {
+ status = "disabled";
+};
diff --git a/arch/arm/boot/dts/am437x-sk-evm.dts b/arch/arm/boot/dts/am437x-sk-evm.dts
index 496ed34..20a34d2 100644
--- a/arch/arm/boot/dts/am437x-sk-evm.dts
+++ b/arch/arm/boot/dts/am437x-sk-evm.dts
@@ -892,3 +892,7 @@ vpfe0_ep: endpoint {
};
};
};
+
+&pruss1_mdio {
+ status = "disabled";
+};
diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index aae0af1..d16aa22 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -1018,3 +1018,7 @@ &mux_synctimer32k_ck {
&cpu {
cpu0-supply = <&dcdc2>;
};
+
+&pruss1_mdio {
+ status = "disabled";
+};