In warm reset, the value of CTRLMMR_MCU_RST_SRC was not being reset. This leads to a reset-loop boot failure when a warm reset is triggered from the MAIN domain (by writing 0x2006 to MCU_RST_CTRL).
Signed-off-by: Anshul Dalal <[email protected]> --- Changes in v2: - Fix commit message where the issue was observed on a 'warm reset' and not a 'cold boot' - Link to v1: https://patch.msgid.link/[email protected] --- arch/arm/mach-k3/am64x/am642_init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/mach-k3/am64x/am642_init.c b/arch/arm/mach-k3/am64x/am642_init.c index a15adf1cb1e7..a177c2658d49 100644 --- a/arch/arm/mach-k3/am64x/am642_init.c +++ b/arch/arm/mach-k3/am64x/am642_init.c @@ -255,6 +255,8 @@ void board_init_f(ulong dummy) if (rst_src == COLD_BOOT || rst_src & (SW_POR_MCU | SW_POR_MAIN)) { printf("Resetting on cold boot to workaround ErrataID:i2331\n"); printf("Please resend tiboot3.bin in case of UART/DFU boot\n"); + /* clear MCU_RST_SRC register before reset */ + writel(0xFFFFFFFF, CTRLMMR_MCU_RST_SRC); do_reset(NULL, 0, 0, NULL); } #endif --- base-commit: e800cc67f5b6cb50a20f37c993ec1cd4063bdbd3 change-id: 20260702-am64x_sw_rst_fix-eb5436122780 Best regards, -- Anshul Dalal <[email protected]>
