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arm64: zynqmp: Minor DT changes

PATCH Applied Michal Simek 1 participant 6 messages Sep 2, 2025 – Sep 12, 2025

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Michal Simek

author maintainer
#0 lore raw

cover arm64: zynqmp: Minor DT changes

Hi,

sending some small amount of patches to get in sync with U-Boot DTs to be able to switch U-Boot to OF_UPSTREAM.
The next step is going to be to add missing boards to Linux.

Thanks,
Michal

Michal Simek (2):
arm64: zynqmp: Describe ethernet controllers via aliases on SOM
arm64: zynqmp: Enable DP in kr260/kv260 revA

Quanyang Wang (1):
arm64: zynqmp: Disable coresight by default

Radhey Shyam Pandey (1):
arm64: zynqmp: Revert usb node drive strength and slew rate for zcu106

 .../boot/dts/xilinx/zynqmp-sck-kr-g-revA.dtso | 17 +++++++++++++++
 .../boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso |  5 +++++
 .../boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso | 21 +++++++++++++++++++
 .../boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso |  4 ++++
 .../boot/dts/xilinx/zynqmp-zcu106-revA.dts    |  4 ++--
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi        |  4 ++++
 6 files changed, 53 insertions(+), 2 deletions(-)
Signature · 3 lines
2.43.0

base-commit: 4f96c5db61f238e8a957df2b81d6343a5e38ca59
author maintainer
#1 lore raw

PATCH 1/4 arm64: zynqmp: Disable coresight by default

From: Quanyang Wang <[email protected]>

When secure-boot mode of bootloader is enabled, the registers of coresight are not permitted to access that's why disable it by default.

Signed-off-by Quanyang Wang <[email protected]>
Signed-off-by Michal Simek <[email protected]>

---

 arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 4 ++++
 1 file changed, 4 insertions(+)
arch/arm64/boot/dts/xilinx/zynqmp.dtsi +4 -0
index 5f26649c9e11..938b014ca923 100644
@@ -550,6 +550,7 @@ cpu0_debug: debug@fec10000 {
 			reg = <0x0 0xfec10000 0x0 0x1000>;
 			clock-names = "apb_pclk";
 			cpu = <&cpu0>;
+			status = "disabled";
 		};
 
 		cpu1_debug: debug@fed10000 {

@@ -557,6 +558,7 @@ cpu1_debug: debug@fed10000 {
 			reg = <0x0 0xfed10000 0x0 0x1000>;
 			clock-names = "apb_pclk";
 			cpu = <&cpu1>;
+			status = "disabled";
 		};
 
 		cpu2_debug: debug@fee10000 {

@@ -564,6 +566,7 @@ cpu2_debug: debug@fee10000 {
 			reg = <0x0 0xfee10000 0x0 0x1000>;
 			clock-names = "apb_pclk";
 			cpu = <&cpu2>;
+			status = "disabled";
 		};
 
 		cpu3_debug: debug@fef10000 {

@@ -571,6 +574,7 @@ cpu3_debug: debug@fef10000 {
 			reg = <0x0 0xfef10000 0x0 0x1000>;
 			clock-names = "apb_pclk";
 			cpu = <&cpu3>;
+			status = "disabled";
 		};
 
 		/* GDMA */
Signature · 1 line
2.43.0
author maintainer
#2 lore raw

PATCH 2/4 arm64: zynqmp: Revert usb node drive strength and slew rate for zcu106

In reply to Michal Simek

From: Radhey Shyam Pandey <[email protected]>

On a few zcu106 boards USB devices (Dell MS116 USB Optical Mouse, Dell USB Entry Keyboard) are not enumerated on linux boot due to commit 'b8745e7eb488 ("arm64: zynqmp: Fix usb node drive strength and slew rate")'.

To fix it as a workaround revert to working version and then investigate at board level why drive strength from 12mA to 4mA and slew from fast to slow is not working.

Signed-off-by Radhey Shyam Pandey <[email protected]>
Signed-off-by Michal Simek <[email protected]>

---

 arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts +2 -2
index cd132abf6e00..7f6c87d4d77e 100644
@@ -808,8 +808,8 @@ conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
-			drive-strength = <4>;
-			slew-rate = <SLEW_RATE_SLOW>;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 	};
Signature · 1 line
2.43.0
author maintainer
#3 lore raw

PATCH 3/4 arm64: zynqmp: Describe ethernet controllers via aliases on SOM

In reply to Michal Simek

Add ethernet aliases to CC (Carrier card) description to create a connection which is used by U-BOOT (fdt_fixup_ethernet()) for updating local-mac-address in DT.
On Kria SOM MAC address is read from i2c eeprom at start and based on it environment variables are created. Without creating aliases U-Boot is not able to inject local-mac-address DT property and OS won't get the same MAC address unless another i2c read is happening in OS.
Also aliases are using string not phandle (because of dtso) that's why full path has to be provided but that shouldn't be a big issue because location of ethernet controller is fixed.

Signed-off-by Michal Simek <[email protected]>

---

 arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso | 5 +++++
 arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso | 4 ++++
 arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso | 4 ++++
 3 files changed, 13 insertions(+)
arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso +5 -0
index b7cda216b179..99ad220d13d6 100644
@@ -20,6 +20,11 @@
 		     "xlnx,zynqmp-sk-kr260", "xlnx,zynqmp";
 	model = "ZynqMP KR260 revB";
 
+	aliases {
+		ethernet0 = "/axi/ethernet@ff0b0000"; /* &gem0 */
+		ethernet1 = "/axi/ethernet@ff0c0000"; /* &gem1 */
+	};
+
 	ina260-u14 {
 		compatible = "iio-hwmon";
 		io-channels = <&u14 0>, <&u14 1>, <&u14 2>;
arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso +4 -0
index a98a888d1385..3c36eb52e968 100644
@@ -28,6 +28,10 @@
 		     "xlnx,zynqmp-sk-kv260", "xlnx,zynqmp";
 	model = "ZynqMP KV260 revA";
 
+	aliases {
+		ethernet0 = "/axi/ethernet@ff0e0000"; /* &gem3 */
+	};
+
 	ina260-u14 {
 		compatible = "iio-hwmon";
 		io-channels = <&u14 0>, <&u14 1>, <&u14 2>;
arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso +4 -0
index 1d2b46d7949e..a4ae37ebaccf 100644
@@ -23,6 +23,10 @@
 		     "xlnx,zynqmp-sk-kv260", "xlnx,zynqmp";
 	model = "ZynqMP KV260 revB";
 
+	aliases {
+		ethernet0 = "/axi/ethernet@ff0e0000"; /* &gem3 */
+	};
+
 	ina260-u14 {
 		compatible = "iio-hwmon";
 		io-channels = <&u14 0>, <&u14 1>, <&u14 2>;
Signature · 1 line
2.43.0
author maintainer
#4 lore raw

PATCH 4/4 arm64: zynqmp: Enable DP in kr260/kv260 revA

In reply to Michal Simek

Enable DP output in both CC (Carrier Cards).

Signed-off-by Michal Simek <[email protected]>

---

 .../boot/dts/xilinx/zynqmp-sck-kr-g-revA.dtso   | 17 +++++++++++++++++
 .../boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso   | 17 +++++++++++++++++
 2 files changed, 34 insertions(+)
arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revA.dtso +17 -0
index fbacfa984d76..b92dcb86e87e 100644
@@ -71,6 +71,17 @@ clk_25_1: si5332-4 { /* u17 - GEM3 */
 		#clock-cells = <0>;
 		clock-frequency = <25000000>;
 	};
+	dpcon {
+		compatible = "dp-connector";
+		label = "P11";
+		type = "full-size";
+
+		port {
+			dpcon_in: endpoint {
+				remote-endpoint = <&dpsub_dp_out>;
+			};
+		};
+	};
 };
 
 &i2c1 { /* I2C_SCK C26/C27 - MIO from SOM */

@@ -145,6 +156,12 @@ &zynqmp_dpsub {
 	assigned-clock-rates = <27000000>, <25000000>, <300000000>;
 };
 
+&out_dp {
+	dpsub_dp_out: endpoint {
+		remote-endpoint = <&dpcon_in>;
+	};
+};
+
 &zynqmp_dpdma {
 	status = "okay";
 	assigned-clock-rates = <600000000>;
arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso +17 -0
index 3c36eb52e968..d7351a17d3e8 100644
@@ -72,6 +72,17 @@ si5332_5: si5332-5 { /* u17 */
 		#clock-cells = <0>;
 		clock-frequency = <27000000>;
 	};
+	dpcon {
+		compatible = "dp-connector";
+		label = "P11";
+		type = "full-size";
+
+		port {
+			dpcon_in: endpoint {
+				remote-endpoint = <&dpsub_dp_out>;
+			};
+		};
+	};
 };
 
 &i2c1 { /* I2C_SCK C23/C24 - MIO from SOM */

@@ -122,6 +133,12 @@ &zynqmp_dpsub {
 	assigned-clock-rates = <27000000>, <25000000>, <300000000>;
 };
 
+&out_dp {
+	dpsub_dp_out: endpoint {
+		remote-endpoint = <&dpcon_in>;
+	};
+};
+
 &zynqmp_dpdma {
 	status = "okay";
 	assigned-clock-rates = <600000000>;
Signature · 1 line
2.43.0
author maintainer Applied
#5 lore raw
In reply to Michal Simek
Quoted 20 lines · Michal Simek

Hi,

sending some small amount of patches to get in sync with U-Boot DTs to be able to switch U-Boot to OF_UPSTREAM.
The next step is going to be to add missing boards to Linux.

Thanks,
Michal

Michal Simek (2):
arm64: zynqmp: Describe ethernet controllers via aliases on SOM
arm64: zynqmp: Enable DP in kr260/kv260 revA

Quanyang Wang (1):
arm64: zynqmp: Disable coresight by default

Radhey Shyam Pandey (1):
arm64: zynqmp: Revert usb node drive strength and slew rate for zcu106

Quoted 8 lines
  .../boot/dts/xilinx/zynqmp-sck-kr-g-revA.dtso | 17 +++++++++++++++
  .../boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso |  5 +++++
  .../boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso | 21 +++++++++++++++++++
  .../boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso |  4 ++++
  .../boot/dts/xilinx/zynqmp-zcu106-revA.dts    |  4 ++--
  arch/arm64/boot/dts/xilinx/zynqmp.dtsi        |  4 ++++
  6 files changed, 53 insertions(+), 2 deletions(-)

Applied.
M