Purpose: Add the IPCC channel 4 as "detach" mailbox to support the remoteproc the feature added in [1]. The enable of this feature is a design choice. As consequence, the new mbox is declared only for stm32mp157c-ed1 & stm32mp15x-dkx boards maintained by ST Microelectronics. Aim: Allow to send to the remote processor a HW signal on IPCC channel 4 when user space requests to detach the main processor from the remote processor (e.g. a reboot of the Linux processor on a crash). [1] https://patchwork.ozlabs.org/project/devicetree-bindings/cover/20210331073347.8293-1-arnaud.pouliquen@xxxxxxxxxxx/ Arnaud Pouliquen (2): ARM: dts: stm32: Add coprocessor detach mbox on stm32mp157c-ed1 board ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15x-dkx boards arch/arm/boot/dts/stm32mp157c-ed1.dts | 4 ++-- arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) -- 2.17.1
