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STM32WB0: add TRNG support #83152

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merged 7 commits into from
Jan 22, 2025
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STM32WB0: add TRNG support #83152

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37a9669
dts: bindings: rng: add STM32 binding for IRQ-less RNG
mathieuchopstm Dec 17, 2024
2de1b15
dts: arm: st: wb0: add TRNG node
mathieuchopstm Dec 16, 2024
6897cfb
drivers: entropy: stm32: add support for TRNG without interrupt line
mathieuchopstm Dec 17, 2024
d4f63e8
tests: entropy: api: add overlay for Nucleo-WB05KZ
mathieuchopstm Dec 17, 2024
844e717
drivers: entropy: stm32: add support for STM32WB09 TRNG
mathieuchopstm Dec 18, 2024
aba323c
tests: entropy: api: add overlay for Nucleo-WB09KE
mathieuchopstm Dec 18, 2024
636fd1d
tests: entropy: api: add overlay for Nucleo-WB07CC
mathieuchopstm Dec 18, 2024
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16 changes: 16 additions & 0 deletions dts/arm/st/wb0/stm32wb0.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -259,6 +259,22 @@
dma-requests= <25>;
status = "disabled";
};

/**
* This node is valid for STM32WB05, STM32WB06 and
* STM32WB07, all equipped with the same IRQ-less
* TRNG instance. Since all those properties are
* also valid on STM32SWB09, except "compatible",
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Suggested change
* also valid on STM32SWB09, except "compatible",
* also valid on STM32SWB09 except "compatible",

* we pretend this node is valid for all SoCs of
* the series and clean up in `stm32wb09.dtsi`.
*/
rng: rng@48600000 {
compatible = "st,stm32-rng-noirq";
reg = <0x48600000 DT_SIZE_K(4)>;
clocks = <&rcc STM32_CLOCK(AHB0, 18)>;
generation-delay-ns = <1250>; /* 1.25us */
status = "disabled";
};
};

bt_hci_wb0: bt_hci_wb0 {
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12 changes: 12 additions & 0 deletions dts/arm/st/wb0/stm32wb09.dtsi
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Expand Up @@ -14,5 +14,17 @@
/ {
soc {
compatible = "st,stm32wb09", "st,stm32wb0", "simple-bus";

rng: rng@48600000 {
/**
* STM32WB09 TRNG has an interrupt line.
* Switch to proper compatible, delete property
* that doesn't apply to it, and add the interrupt
* line as property.
*/
/delete-property/ generation-delay-ns;
compatible = "st,stm32-rng";
interrupts = <28 0>;
};
};
};