[PATCH 4/8] of: add flag to not create resmem DT entries

[Rouven Czerwinski]

If we are parsing entries from the /reserved-memory device tree path we
don't want to add them again as resmem blocks at the beginning of the
device tree. Therefore add another flag to indicate this.

Signed-off-by: Rouven Czerwinski <r.czerwinski at pengutronix.de>
---
 drivers/of/fdt.c | 10 +++++++---
 include/of.h     |  2 ++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 6aade13fa0..da36739713 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -552,6 +552,9 @@ int of_add_reserve_entry(resource_size_t start, resource_size_t end,
 	if (flags & OF_RESERVE_ENTRY_FLAG_XN)
 		of_reserve_map.xn |= BIT(e);
 
+	if (flags & OF_RESERVE_ENTRY_FLAG_NO_RESERVE)
+		of_reserve_map.noentry |= BIT(e);
+
 	return 0;
 }
 
@@ -594,9 +597,10 @@ void fdt_add_reserve_map(void *__fdt)
 	fdt_res += n;
 
 	for (i = 0; i < res->num_entries; i++) {
-		of_write_number(&fdt_res->address, res->start[i], 2);
-		of_write_number(&fdt_res->size, res->end[i] - res->start[i] + 1,
-				2);
+		if (!(res->noentry & BIT(i))) {
+			of_write_number(&fdt_res->address, res->start[i], 2);
+			of_write_number(&fdt_res->size, res->end[i] - res->start[i] + 1, 2);
+		}
 		fdt_res++;
 	}
 
diff --git a/include/of.h b/include/of.h
index 088b088223..c6d3836db1 100644
--- a/include/of.h
+++ b/include/of.h
@@ -55,9 +55,11 @@ struct of_reserve_map {
 	uint64_t end[OF_MAX_RESERVE_MAP];
 	int num_entries;
 	u32 xn;
+	u32 noentry;
 };
 
 #define OF_RESERVE_ENTRY_FLAG_XN		BIT(0)
+#define OF_RESERVE_ENTRY_FLAG_NO_RESERVE	BIT(1)
 
 int of_add_reserve_entry(resource_size_t start, resource_size_t end,
 		 int flags);
-- 
2.31.1