This is a note to let you know that I've just added the patch titled
ARM: dts: stm32: Add missing detach mailbox for DHCOM SoM
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-stm32-add-missing-detach-mailbox-for-dhcom-s.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a697d381f66458f2f34dfd9d52aadc11223e2b10
Author: Marek Vasut <marex@xxxxxxx>
Date: Tue Jul 11 15:09:07 2023 +0200
ARM: dts: stm32: Add missing detach mailbox for DHCOM SoM
[ Upstream commit deb7edbc27a6ec4d8f5edfd8519b7ed13cbd2a52 ]
Add missing "detach" mailbox to this board to permit the CPU to inform
the remote processor on a detach. This signal allows the remote processor
firmware to stop IPC communication and to reinitialize the resources for
a re-attach.
Without this mailbox, detach is not possible and kernel log contains the
following warning to, so make sure all the STM32MP15xx platform DTs are
in sync regarding the mailboxes to fix the detach issue and the warning:
"
stm32-rproc 10000000.m4: mbox_request_channel_byname() could not locate channel named "detach"
"
Fixes: 6257dfc1c412 ("ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15x-dkx boards")
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Signed-off-by: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi
index e61df23d361a7..74a11ccc5333f 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi
@@ -416,8 +416,8 @@ &iwdg2 {
&m4_rproc {
memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
<&vdev0vring1>, <&vdev0buffer>;
- mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
- mbox-names = "vq0", "vq1", "shutdown";
+ mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>;
+ mbox-names = "vq0", "vq1", "shutdown", "detach";
interrupt-parent = <&exti>;
interrupts = <68 1>;
status = "okay";
