fdtdec: Implement fdtdec_set_phandle()

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

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/include/fdtdec.h b/include/fdtdec.h
index 3f75387..ba7f873 100644 (file)
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -1021,6 +1021,17 @@ int fdtdec_setup_memory_banksize_fdt(const void *blob);
 int fdtdec_setup_memory_banksize(void);
 
 /**
+ * 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
  */
 int fdtdec_setup(void);

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index a51dc5e..079a9b1 100644 (file)
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1261,6 +1261,13 @@ __weak void *board_fdt_blob_setup(void)
 }
 #endif
 
+int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
+{
+       fdt32_t value = cpu_to_fdt32(phandle);
+
+       return fdt_setprop(blob, node, "phandle", &value, sizeof(value));
+}
+
 int fdtdec_setup(void)
 {
 #if CONFIG_IS_ENABLED(OF_CONTROL)