[PATCH 5/5] riscv: select OF_HAS_PRIOR_STAGE by default if SBI is enabled

[Yao Zi]

Availability of RISC-V SBI service implies a prior stage exists. As SBI
firmware usually passes a FDT to the loaded program, let's select
OF_HAS_PRIOR_STAGE if SBI is enabled.

With previously added fallback version of board_fdt_blob_setup, S-Mode
RISC-V ports use the SBI-provided FDT by default. This covers the most
common usecase, where a SPL (probably the U-Boot one) selects proper
devicetree, loads SBI and U-Boot then invokes SBI with the devicetree.

Signed-off-by: Yao Zi <ziyao at disroot.org>
---
 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index b24623590f2..f7706788f92 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -410,6 +410,7 @@ config NR_CPUS
 config SBI
 	bool
 	default y if RISCV_SMODE || SPL_RISCV_SMODE
+	imply OF_HAS_PRIOR_STAGE
 
 choice
 	prompt "SBI support"
-- 
2.48.1