Patchwork [03/25] dt: add helper for phandle references

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Submitter Alexander Graf
Date May 30, 2012, 11 a.m.
Message ID <1338375646-15064-4-git-send-email-agraf@suse.de>
Download mbox | patch
Permalink /patch/161950/
State New
Headers show

Comments

Alexander Graf - May 30, 2012, 11 a.m.
Phandles are the fancy device tree name for "pointer to another node".
To create a phandle property, we most likely want to reference to the
node we're pointing to by its path. So create a helper that allows
us to do so.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 device_tree.c |    7 +++++++
 device_tree.h |    2 ++
 2 files changed, 9 insertions(+), 0 deletions(-)

Patch

diff --git a/device_tree.c b/device_tree.c
index b1dff4f..8e9262c 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -162,6 +162,13 @@  int qemu_devtree_setprop_string(void *fdt, const char *node_path,
     return r;
 }
 
+int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
+                                 const char *property, const char *string)
+{
+    uint32_t phandle = fdt_get_phandle(fdt, findnode_nofail(fdt, string));
+    return qemu_devtree_setprop_cell(fdt, node_path, property, phandle);
+}
+
 int qemu_devtree_nop_node(void *fdt, const char *node_path)
 {
     int r;
diff --git a/device_tree.h b/device_tree.h
index 9db7f86..2e87c58 100644
--- a/device_tree.h
+++ b/device_tree.h
@@ -31,6 +31,8 @@  int qemu_devtree_setprop_cell4(void *fdt, const char *node_path,
                                uint32_t val2, uint32_t val3, uint32_t val4);
 int qemu_devtree_setprop_string(void *fdt, const char *node_path,
                                 const char *property, const char *string);
+int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
+                                 const char *property, const char *string);
 int qemu_devtree_nop_node(void *fdt, const char *node_path);
 int qemu_devtree_add_subnode(void *fdt, const char *name);