Currently the expansion of the console variable leads to the following kernel command line:

console=ttyLP0,${baudrate} earlycon root=/dev/mmcblk1p2 rootwait rw

, which causes the console to not show characters after the LPUART driver is probed as the 'baudrate' variable is not properly translated.

Fix it by splitting the console variable in two parts: one for the ttyLP0 part and the other one for the baudrate, which matches the way it is done on other i.MX targets.

Tested by successfully booting a mainline kernel on a i.MX8QXP MEK board.

Signed-off-by: Fabio Estevam festevam@gmail.com --- Anatolij's patch is needed for booting: https://lists.denx.de/pipermail/u-boot/2020-February/400417.html

include/configs/imx8qxp_mek.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/configs/imx8qxp_mek.h b/include/configs/imx8qxp_mek.h index 81ac4b52f3..0aaca3325b 100644 --- a/include/configs/imx8qxp_mek.h +++ b/include/configs/imx8qxp_mek.h @@ -65,7 +65,7 @@ "script=boot.scr\0" \ "image=Image\0" \ "panel=NULL\0" \ - "console=ttyLP0,${baudrate} earlycon\0" \ + "console=ttyLP0\0" \ "fdt_addr=0x83000000\0" \ "fdt_high=0xffffffffffffffff\0" \ "boot_fdt=try\0" \ @@ -76,7 +76,7 @@ "mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \ "mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \ "mmcautodetect=yes\0" \ - "mmcargs=setenv bootargs console=${console} root=${mmcroot}\0 " \ + "mmcargs=setenv bootargs console=${console},${baudrate} root=${mmcroot}\0 " \ "loadbootscript=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \ "bootscript=echo Running bootscript from mmc ...; " \ "source\0" \ @@ -104,7 +104,7 @@ "echo wait for boot; " \ "fi;" \ "fi;\0" \ - "netargs=setenv bootargs console=${console} " \ + "netargs=setenv bootargs console=${console},${baudrate} " \ "root=/dev/nfs " \ "ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \ "netboot=echo Booting from net ...; " \