ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp157c-dk2 board

On the stm32mp157fc-dk2 board, we can observe the hdp GPOVAL function on
SoC pin E13 accessible on the pin 5 on the Arduino connector CN13.
Add the relevant configuration but keep it disabled as it's used for
debug only.

Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Link: https://lore.kernel.org/r/20250711-hdp-upstream-v7-8-faeecf7aaee1@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

diff --git a/arch/arm/boot/dts/st/stm32mp157c-dk2.dts b/arch/arm/boot/dts/st/stm32mp157c-dk2.dts
index 78165c7865e1d256319e2af198d2d369ba38d2ba..1ec3b8f2faa92f7c3f254228e7e93e9aec627c3b 100644 (file)
--- a/arch/arm/boot/dts/st/stm32mp157c-dk2.dts
+++ b/arch/arm/boot/dts/st/stm32mp157c-dk2.dts
@@ -62,6 +62,12 @@
        remote-endpoint = <&panel_in>;
 };
 
+&hdp {
+       pinctrl-names = "default", "sleep";
+       pinctrl-0 = <&hdp2_gpo &hdp2_pins_a>;
+       pinctrl-1 = <&hdp2_sleep_pins_a>;
+};
+
 &i2c1 {
        touchscreen@38 {
                compatible = "focaltech,ft6236";