[U-Boot] [PATCH v4 2/2] sifive: fu540: Enable OF_SEPARATE

[Jagan Teki]

Use dts support from U-Boot via OF_SEPARATE instead of depending from
opensbi.

This would help to make the necessary changes in drivers and device trees
in U-Boot tree itself. This feature would also be helpful to not pass
dtb during opensbi builds.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
Changes for v4:
- Drop abosolete text

 configs/sifive_fu540_defconfig | 3 ++-
 doc/board/sifive/fu540.rst     | 5 +----
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/configs/sifive_fu540_defconfig b/configs/sifive_fu540_defconfig
index 48865e5f11..979d0a0418 100644
--- a/configs/sifive_fu540_defconfig
+++ b/configs/sifive_fu540_defconfig
@@ -6,6 +6,7 @@ CONFIG_RISCV_SMODE=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_MISC_INIT_R=y
+CONFIG_DEFAULT_DEVICE_TREE="hifive-unleashed-a00"
 CONFIG_DISPLAY_CPUINFO=y
 CONFIG_DISPLAY_BOARDINFO=y
-CONFIG_OF_PRIOR_STAGE=y
+CONFIG_OF_SEPARATE=y
diff --git a/doc/board/sifive/fu540.rst b/doc/board/sifive/fu540.rst
index 7807f5b2c1..dd279f6a03 100644
--- a/doc/board/sifive/fu540.rst
+++ b/doc/board/sifive/fu540.rst
@@ -58,10 +58,7 @@ firmware. We need to compile OpenSBI with below command:
 
 .. code-block:: none
 
-    make PLATFORM=sifive/fu540 FW_PAYLOAD_PATH=<path to u-boot.bin> FW_PAYLOAD_FDT_PATH=<path to hifive-unleashed-a00.dtb from Linux>
-
-(Note: Prefer hifive-unleashed-a00.dtb from Linux-5.3 or higher)
-(Note: Linux-5.2 is also fine but it does not have ethernet DT node)
+    make PLATFORM=sifive/fu540 FW_PAYLOAD_PATH=<path to u-boot-dtb.bin>
 
 More detailed description of steps required to build FW_PAYLOAD firmware
 is beyond the scope of this document. Please refer OpenSBI documenation.
-- 
2.18.0.321.gffc6fa0e3