[U-Boot] [PATCH 3/6] fdtdec: Implement fdtdec_set_phandle()

[Thierry Reding]

From: Thierry Reding <treding at nvidia.com>

This function can be used to set a phandle for a given node.

Signed-off-by: Thierry Reding <treding at nvidia.com>
---
 include/fdtdec.h | 11 +++++++++++
 lib/fdtdec.c     | 16 ++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/include/fdtdec.h b/include/fdtdec.h
index 5eb3c0c237a9..997103a87cdf 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -968,6 +968,17 @@ int fdtdec_setup_memory_banksize(void);
  */
 int fdtdec_get_max_phandle(const void *blob, uint32_t *maxp);
 
+/**
+ * fdtdec_set_phandle() - sets the phandle of a given node
+ *
+ * @param blob		FDT blob
+ * @param node		offset in the FDT blob of the node whose phandle is to
+ *			be set
+ * @param phandle	phandle to set for the given node
+ * @return 0 on success or a negative error code on failure
+ */
+int fdtdec_set_phandle(void *blob, int node, uint32_t phandle);
+
 /**
  * Set up the device tree ready for use
  */
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index f2af947c106e..9195a05d1129 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1271,6 +1271,22 @@ int fdtdec_get_max_phandle(const void *blob, uint32_t *maxp)
 	return 0;
 }
 
+int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
+{
+	fdt32_t value = cpu_to_fdt32(phandle);
+	int err;
+
+	err = fdt_setprop(blob, node, "linux,phandle", &value, sizeof(value));
+	if (err < 0)
+		return err;
+
+	err = fdt_setprop(blob, node, "phandle", &value, sizeof(value));
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
 int fdtdec_setup(void)
 {
 #if CONFIG_IS_ENABLED(OF_CONTROL)
-- 
2.20.1