[PATCH 4/6] of/fdt: Populate phys_initrd_start/phys_initrd_size from FDT

[Florian Fainelli]

If the architecture implements ARCH_HAS_PHYS_INITRD, make the FDT
scanning code populate the physical address of the start of the FDT and
its size.

Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
 arch/arm/mm/init.c | 2 +-
 drivers/of/fdt.c   | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 8f364aa24172..517e95cfb5d2 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -237,7 +237,7 @@ static void __init arm_initrd_init(void)
 	phys_addr_t start;
 	unsigned long size;
 
-	/* FDT scan will populate initrd_start */
+	/* FDT scan will populate initrd_start and phys_initrd_start */
 	if (initrd_start && !phys_initrd_size) {
 		phys_initrd_start = __virt_to_phys(initrd_start);
 		phys_initrd_size = initrd_end - initrd_start;
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 76c83c1ffeda..313cd4f24258 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -899,6 +899,10 @@ static void __early_init_dt_declare_initrd(unsigned long start,
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
 	initrd_below_start_ok = 1;
+#ifdef CONFIG_ARCH_HAS_PHYS_INITRD
+	phys_initrd_start = start;
+	phys_initrd_size = end - start;
+#endif
 }
 #endif
 
-- 
2.17.1