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

Thierry Reding
2019-03-08T20:11:37Z

From: Thierry Reding <treding@nvidia.com>

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

Signed-off-by: Thierry Reding <treding@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