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stm32n6: Add I3C support #96914

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Merged
merged 2 commits into from
Oct 6, 2025
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Merged

stm32n6: Add I3C support #96914

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dc510bd
dts: arm: stm32n6: Add i3c nodes
erwango Sep 26, 2025
493064a
boards: stm32n6570_dk: Configure i3c1
erwango Oct 2, 2025
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2 changes: 2 additions & 0 deletions boards/st/stm32n6570_dk/arduino_r3_connector.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -42,3 +42,5 @@ arduino_serial: &usart2 {};
arduino_i2c: &i2c1 {};

arduino_spi: &spi5 {};

arduino_i3c: &i3c1 {};
20 changes: 20 additions & 0 deletions boards/st/stm32n6570_dk/stm32n6570_dk_common.dtsi
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Expand Up @@ -173,6 +173,12 @@
status = "okay";
};

&ic10 {
pll-src = <4>;
ic-div = <32>;
status = "okay";
};

&ic11 {
pll-src = <1>;
ic-div = <3>;
Expand Down Expand Up @@ -313,6 +319,20 @@ csi_i2c: &i2c1 {
};
};

&i3c1 {
pinctrl-0 = <&i3c1_scl_ph9 &i3c1_sda_pc1>;
pinctrl-names = "default";

clocks = <&rcc STM32_CLOCK(APB1, 24)>,
<&rcc STM32_SRC_IC10 I3C1_SEL(2)>;

i2c-scl-hz = <400000>;
i3c-scl-hz = <6000000>;

/* Due to pin conflict with i2c1, keep it disabled */
/* status = "okay"; */
};

zephyr_udc0: &usbotg_hs1 {
status = "okay";
};
Expand Down
26 changes: 26 additions & 0 deletions dts/arm/st/n6/stm32n6.dtsi
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Expand Up @@ -635,6 +635,32 @@
status = "disabled";
};

i3c1: i3c@50006000 {
compatible = "st,stm32-i3c";
reg = <0x50006000 0x400>;
interrupts = <108 0>, <109 0>;
interrupt-names = "event", "error";
#address-cells = <3>;
#size-cells = <0>;
clocks = <&rcc STM32_CLOCK(APB1, 24)>;
resets = <&rctl STM32_RESET(APB1L, 24)>;
zephyr,pm-device-runtime-auto;
status = "disabled";
};

i3c2: i3c@50006400 {
compatible = "st,stm32-i3c";
reg = <0x50006400 0x400>;
interrupts = <110 0>, <111 0>;
interrupt-names = "event", "error";
#address-cells = <3>;
#size-cells = <0>;
clocks = <&rcc STM32_CLOCK(APB1, 25)>;
resets = <&rctl STM32_RESET(APB1L, 25)>;
zephyr,pm-device-runtime-auto;
status = "disabled";
};

spi1: spi@52003000 {
compatible = "st,stm32h7-spi", "st,stm32-spi-fifo", "st,stm32-spi";
#address-cells = <1>;
Expand Down