[PATCH 08/10] configs: e850-96: Disable CONFIG_DEFAULT_FDT_FILE

[Sam Protsenko]

Linux kernel should use some separate device tree obtained from another
source anyway. For example the dtb file can be read from /boot directory
in eMMC rootfs partition, either by GRUB or U-Boot. Using U-Boot's
device tree blob to provide it to the kernel (when
CONFIG_DEFAULT_FDT_FILE is set and nobody else overrides this choice)
might lead to undesired effects when booting the OS. For example, if a
user sets "dr_mode" property to "host" value in U-Boot's dts to enable
USB host capabilities in U-Boot, it might confuse usb-conn-gpio driver
in Linux kernel later like this:

    platform connector: deferred probe pending: usb-conn-gpio:
    failed to get role switch

Disable CONFIG_DEFAULT_FDT_FILE option to avoid any possible confusion.

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
---
 board/samsung/e850-96/e850-96.env | 2 +-
 configs/e850-96_defconfig         | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/board/samsung/e850-96/e850-96.env b/board/samsung/e850-96/e850-96.env
index aed7a71046d0..992318b0ab26 100644
--- a/board/samsung/e850-96/e850-96.env
+++ b/board/samsung/e850-96/e850-96.env
@@ -5,7 +5,7 @@ fdt_addr_r=0x8c000000
 scriptaddr=0x8c100000
 pxefile_addr_r=0x8c200000
 ramdisk_addr_r=0x8c300000
-fdtfile=CONFIG_DEFAULT_FDT_FILE
+fdtfile=exynos/exynos850-e850-96.dtb
 
 dfu_alt_info=
 	rawemmc raw 0 0x747c000 mmcpart 1;
diff --git a/configs/e850-96_defconfig b/configs/e850-96_defconfig
index b4066d874602..412c99468f29 100644
--- a/configs/e850-96_defconfig
+++ b/configs/e850-96_defconfig
@@ -19,7 +19,6 @@ CONFIG_EFI_RUNTIME_UPDATE_CAPSULE=y
 CONFIG_EFI_CAPSULE_ON_DISK=y
 CONFIG_EFI_CAPSULE_FIRMWARE_RAW=y
 CONFIG_BOOTSTD_FULL=y
-CONFIG_DEFAULT_FDT_FILE="exynos850-e850-96.dtb"
 # CONFIG_DISPLAY_CPUINFO is not set
 # CONFIG_BOARD_INIT is not set
 CONFIG_BOARD_LATE_INIT=y
-- 
2.39.5