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[v3,05/17] ARM64 / ACPI: If we chose to boot from acpi then disable FDT

Message ID 1409583475-6978-6-git-send-email-hanjun.guo@linaro.org
State New
Headers show

Commit Message

Hanjun Guo Sept. 1, 2014, 2:57 p.m. UTC 
From: Graeme Gregory <graeme.gregory@linaro.org>

If the early boot methods of acpi are happy that we have valid ACPI
tables and acpi=off has not been passed. Then do not unflat
devicetree effectively disabling further hardware probing from DT.

Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
---
 arch/arm64/kernel/setup.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index fb7cc0e..ba181ba 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -395,7 +395,8 @@  void __init setup_arch(char **cmdline_p)
 	efi_idmap_init();
 
 	cpu_logical_map(0) = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
-	unflatten_device_tree();
+	if (acpi_disabled)
+		unflatten_device_tree();
 
 	psci_init();