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dts: stm32h5: Add DCMI device information #88805

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dts: stm32h5: Add DCMI device information #88805

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dts: stm32h5: Add DCMI device information
idekine Apr 18, 2025
e6fc558
Use delete-node to remove non-existant DCMI from STM32H503xx SoCs
idekine Apr 21, 2025
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9 changes: 9 additions & 0 deletions dts/arm/st/h5/stm32h5.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -655,6 +655,15 @@
clocks = <&rcc STM32_CLOCK(APB1_2, 3U)>;
status = "disabled";
};

dcmi: dcmi@4202c000 {
compatible = "st,stm32-dcmi";
reg = <0x4202c000 0x400>;
interrupts = <108 0>;
interrupt-names = "dcmi";
clocks = <&rcc STM32_CLOCK(AHB2, 12U)>;
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Suggested change
clocks = <&rcc STM32_CLOCK(AHB2, 12U)>;
clocks = <&rcc STM32_CLOCK(AHB2, 12)>;

status = "disabled";
};
Comment on lines +658 to +666
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Taking inspiration from #86690 (comment)
It seems like DCMI is absent from STM32H503xx. Maybe this will need to be put in a SoC-specific .dtsi file rather than in the shared .dsti.

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@josuah josuah Apr 18, 2025 •
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@erwango / @JarmouniA what would be the best way to handle this? maybe adding DCMI it to each of these files except the h503?

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@idekine idekine Apr 18, 2025 •
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You bring up a good point @josuah, I appreciate you pointing out that there is an issue that I didn't notice.

Looking further, it seems even that might not be granular enough, since there is bifurcation even within particular SoCs, e.g. the STM32H533 HE/CE vs RE/VE/ZE (see page 15 of the datasheet). However, it looks like stm32h533.dtsi ignores the issue with FMC, which has the same inconsistency across STM32H533, so I'm inclined to put it there and also in stm32h562.dtsi (which gets included by STM32H563 and 573 dtsi files).

I definitely would like to hear @erwango opinion, and I'll be happy to update this as suggested.

(edited to fix a mistake about the dtsi include structure)

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It seems like DCMI is absent from STM32H503xx. Maybe this will need to be put in a SoC-specific .dtsi file rather than in the shared .dtsi.

We can leave it in the root dtsi then use \delete-node\ dcmi; in the files of SoCs that don't have it.

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Updated per @JarmouniA to use delete-node to remove from STM32H503xx SoCs

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I'm a bit late on this, but I'd prefer to put this node in h533 and h562 (and then use \delete-node\ in HE/CE).
Idea is to minimize the use of \delete-node\ (allowing it in package variants) otherwise this could quickly become a mess to maintain.

};

die_temp: dietemp {
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2 changes: 2 additions & 0 deletions dts/arm/st/h5/stm32h503.dtsi
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Expand Up @@ -6,6 +6,8 @@

#include <st/h5/stm32h5.dtsi>

/delete-node/ &dcmi;

/ {
soc {
compatible = "st,stm32h503", "st,stm32h5", "simple-bus";
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