[U-Boot] [PATCH] sunxi: Fix wrong serial console setup in Forfun Q88DB tablet

[Siarhei Siamashka]

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 at 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
-- 
2.4.6