To use mmio32, we also need to set regshift. Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx> --- drivers/tty/serial/8250/8250_mtk.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 7b0dec14c8b80..41f4120abdf29 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -669,6 +669,7 @@ static int __init early_mtk8250_setup(struct earlycon_device *device, return -ENODEV; device->port.iotype = UPIO_MEM32; + device->port.regshift = 2; return early_serial8250_setup(device, NULL); } -- 2.28.0.618.gf4bc123cb7-goog