The Forfun Q88DB tablet was unbootable since commit b6006baf9c2553543e3384983d23d95efbf24fa6 ("sunxi: Move all boards to the driver-model"). Appears that this is caused by the wrong serial console setup in the SPL. The serial console should use PG3/PG4 pins according to the FEX file.
Signed-off-by: Siarhei Siamashka siarhei.siamashka@gmail.com --- configs/forfun_q88db_defconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
While this should be a correct fix, the reason why the tablet failed to boot is a bit unclear. Without the correct CONS_INDEX setup, we should just get the serial console routed to the nonexisting pins B19/B20, and this is expected to be harmless. Maybe the DM code in the main U-Boot binary can't initialize serial console properly if we have a mismatch between the settings in the dts file and the CONS_INDEX settings in the SPL?
diff --git a/configs/forfun_q88db_defconfig b/configs/forfun_q88db_defconfig index 30cead7..30e0937 100644 --- a/configs/forfun_q88db_defconfig +++ b/configs/forfun_q88db_defconfig @@ -13,7 +13,7 @@ CONFIG_VIDEO_LCD_BL_PWM="PB2" CONFIG_DEFAULT_DEVICE_TREE="sun5i-a13-forfun-q88db" # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set CONFIG_SPL=y -CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER" +CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=2,AXP209_POWER" # CONFIG_CMD_IMLS is not set # CONFIG_CMD_FLASH is not set # CONFIG_CMD_FPGA is not set