Skip to content

boards: st: stm32u83c_dk: Add USB support #97486

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 2 commits into
base: main
Choose a base branch
from
+22 −7
Open

boards: st: stm32u83c_dk: Add USB support #97486

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
791af05
dts: arm: st: stm32u0: Move HSI48 to USB capable families
ABESTM Oct 13, 2025
def3c53
boards: st: stm32u083c_dk: Add USB support
ABESTM Oct 13, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 13 additions & 0 deletions boards/st/stm32u083c_dk/stm32u083c_dk.dts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -175,3 +175,16 @@ stm32_lp_tick_source: &lptim2 {
};
};
};

zephyr_udc0: &usb {
clocks = <&rcc STM32_CLOCK(APB1, 13)>,
<&rcc STM32_SRC_HSI48 CLK48_SEL(3)>;
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Probably should be described as a st,stm32-clock-mux like done on STM32F4 (see stm32f412.dtsi).

See also: #96353

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I think it is a good idea. I prepared some implementation, but it is not fully working yet.
I'm a bit confused how it works on STM32F412, since I see there is e.g. following code in clock_stm32_ll_common.c file:

#if defined(STM32_CK48_ENABLED)
	case STM32_SRC_CK48:
		*rate = get_ck48_frequency();
		break;
#endif /* STM32_CK48_ENABLED */

But I couldn't find any place where the macro STM32_CK48_ENABLED would be defined.
Either I'm missing something, or the code is actually not used on STM32F412.
However, the example for nucleo_f412zg board works on my side.

pinctrl-0 = <&usb_dm_pa11 &usb_dp_pa12>;
pinctrl-names = "default";
status = "okay";
};

&clk_hsi48 {
status = "okay";
crs-usb-sof;
};
7 changes: 0 additions & 7 deletions dts/arm/st/u0/stm32u0.dtsi
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -77,13 +77,6 @@
status = "disabled";
};

clk_hsi48: clk-hsi48 {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <DT_FREQ_M(48)>;
status = "disabled";
};

clk_msi: clk-msi {
#clock-cells = <0>;
compatible = "st,stm32-msi-clock";
Expand Down
9 changes: 9 additions & 0 deletions dts/arm/st/u0/stm32u073.dtsi
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,15 @@
};
};

clocks {
clk_hsi48: clk-hsi48 {
#clock-cells = <0>;
compatible = "st,stm32-hsi48-clock";
clock-frequency = <DT_FREQ_M(48)>;
status = "disabled";
};
};

sram1: memory@20000000 {
compatible = "zephyr,memory-region", "mmio-sram";
zephyr,memory-region = "SRAM1";
Expand Down