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Currently the PL011 driver only enables the UART (by setting UARTEN in REG_CR) in pl011_startup(), so if it is used for earlycon it is relying on the bootrom/firmware having left the UART enabled. There's no particular reason not to actively enable the UART before using it for earlycon, and the earlycon handling for e.g. the 8250 UART sets up the UART in its setup function, so follow that in the PL011. This allows use of earlycon with a UART that the firmware hasn't already been using for its own output, but the main motivation is that QEMU will otherwise log a message complaining that the guest is trying to write to a UART it never enabled. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20260210125100.223138-1-peter.maydell@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>