From 3a39dbf87401c35ad6cba1709d3db5948b73aa0c Mon Sep 17 00:00:00 2001
From: Kever Yang <kever.yang@rock-chips.com>
Date: Thu, 22 Feb 2018 17:34:07 +0800
Subject: [PATCH] fdt_support: add fdt_update_reserved_memory()

Add API for rockchip pass uboot logo memory info to kernel.

Change-Id: Ib3bfadc381efae21359a43654493e8e0f4e67dd0
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
---
 common/fdt_support.c  | 30 ++++++++++++++++++++++++++++++
 include/fdt_support.h |  2 ++
 2 files changed, 32 insertions(+)

diff --git a/common/fdt_support.c b/common/fdt_support.c
index 0e8e90481d..feb01d0b79 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -523,6 +523,36 @@ int fdt_fixup_memory(void *blob, u64 start, u64 size)
 	return fdt_fixup_memory_banks(blob, &start, &size, 1);
 }
 
+int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size)
+{
+	int nodeoffset, len, err;
+	u8 tmp[16]; /* Up to 64-bit address + 64-bit size */
+
+#if 0
+	/*name is rockchip_logo*/
+	nodeoffset = fdt_find_or_add_subnode(blob, 0, "reserved-memory");
+	if (nodeoffset < 0)
+		return nodeoffset;
+	printf("hjc>>reserved-memory>>%s, nodeoffset:%d\n", __func__, nodeoffset);
+	nodeoffset = fdt_find_or_add_subnode(blob, nodeoffset, name);
+	if (nodeoffset < 0)
+		return nodeoffset;
+#else
+	nodeoffset = fdt_node_offset_by_compatible(blob, 0, name);
+	if (nodeoffset < 0)
+		debug("Can't find nodeoffset: %d\n", nodeoffset);
+#endif
+	len = fdt_pack_reg(blob, tmp, &start, &size, 1);
+	err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
+	if (err < 0) {
+		printf("WARNING: could not set %s %s.\n",
+				"reg", fdt_strerror(err));
+		return err;
+	}
+
+	return nodeoffset;
+}
+
 void fdt_fixup_ethernet(void *fdt)
 {
 	int i = 0, j, prop;
diff --git a/include/fdt_support.h b/include/fdt_support.h
index f00fadcddb..4f4b48ebb0 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -103,6 +103,8 @@ static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
 }
 #endif
 
+int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size);
+
 void fdt_fixup_ethernet(void *fdt);
 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
 			 const void *val, int len, int create);