The default U-Boot environment variables and design are all set up to have the MCU R5FSS cluster to be in Split-mode. This is the setting in v2021.01 U-Boot and the dt nodes are synched with the kernel binding property names in commit 468ec2f3ef8f ("remoteproc: k3_r5: Sync to upstreamed kernel DT property names") merged in v2021.04-rc2.

The mode for the cluster got switched back to LockStep mode by mistake in commit e49787634312 ("arm: dts: k3-am65: Sync Linux v5.11-rc6 dts into U-Boot") also in v2021.04-rc2. This throws the following warning messages when early-booting the cores using default env variables,

k3_r5f_rproc r5f@41400000: Invalid op: Trying to start secondary core 2 in lockstep mode Load Remote Processor 1 with data@addr=0x82000000 65268 bytes: Failed!

Fix this by switching back the cluster to the expected Split-mode. Make this mode change in the u-boot specific dtsi file to avoid such sync overrides in the future until the kernel dts is also switched to Split-mode by default.

Fixes: e49787634312 ("arm: dts: k3-am65: Sync Linux v5.11-rc6 dts into U-Boot") Signed-off-by: Suman Anna s-anna@ti.com --- arch/arm/dts/k3-am654-base-board-u-boot.dtsi | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/arch/arm/dts/k3-am654-base-board-u-boot.dtsi b/arch/arm/dts/k3-am654-base-board-u-boot.dtsi index df850a2edb6e..0c1305df7e45 100644 --- a/arch/arm/dts/k3-am654-base-board-u-boot.dtsi +++ b/arch/arm/dts/k3-am654-base-board-u-boot.dtsi @@ -76,3 +76,7 @@ &tx_pru2_1 { remoteproc-name = "tx_pru2_1"; }; + +&mcu_r5fss0 { + ti,cluster-mode = <0>; +};