On HS-SE platforms TIFS takes longer to initialize. TIFS only removes the firewall on the registers at the end of initialization. On HS-SE the U-Boot ctrl_mmr_unlock() can happen before TIFS removed the firewall leading to a race condition. This leads to a broken watchdog since the signal configuration doesn't succeed because the write doesn't take effect.
Wait for TIFS to be initialized using k3_sysfw_wait_ready() before doing ctrl_mmr_unlock(). Note that spl_early_init() needs to be done first to setup DM. Link: https://lore.kernel.org/u-boot/[email protected]/ Link: https://lore.kernel.org/u-boot/[email protected]/ Signed-off-by: Markus Schneider-Pargmann <[email protected]> --- arch/arm/mach-k3/am62x/am625_init.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-k3/am62x/am625_init.c b/arch/arm/mach-k3/am62x/am625_init.c index decb50bf853d..9358f406ee21 100644 --- a/arch/arm/mach-k3/am62x/am625_init.c +++ b/arch/arm/mach-k3/am62x/am625_init.c @@ -158,11 +158,12 @@ void board_init_f(ulong dummy) */ store_boot_info_from_rom(); - ctrl_mmr_unlock(); - /* Init DM early */ spl_early_init(); + k3_sysfw_wait_ready(); + ctrl_mmr_unlock(); + /* * Process pinctrl for the serial0 and serial3, aka WKUP_UART0 and * MAIN_UART1 modules and continue regardless of the result of pinctrl. -- 2.55.0
