From 7d5fd1089c36391ffc53a694101f441ab8cbbc05 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Thu, 17 May 2012 15:23:39 +0200 Subject: [PATCH] dt: add helper for phandle enumeration This patch adds a helper to search for a node's phandle by its path. This is especially useful when the phandle is part of an array, not just a single cell in which case qemu_devtree_setprop_phandle would be the easy choice. Signed-off-by: Alexander Graf Reviewed-by: Peter Crosthwaite --- device_tree.c | 16 +++++++++++++++- device_tree.h | 1 + 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/device_tree.c b/device_tree.c index 967c97ac04..2f127b71b0 100644 --- a/device_tree.c +++ b/device_tree.c @@ -132,11 +132,25 @@ int qemu_devtree_setprop_string(void *fdt, const char *node_path, return r; } +uint32_t qemu_devtree_get_phandle(void *fdt, const char *path) +{ + uint32_t r; + + r = fdt_get_phandle(fdt, findnode_nofail(fdt, path)); + if (r <= 0) { + fprintf(stderr, "%s: Couldn't get phandle for %s: %s\n", __func__, + path, fdt_strerror(r)); + exit(1); + } + + return r; +} + int qemu_devtree_setprop_phandle(void *fdt, const char *node_path, const char *property, const char *target_node_path) { - uint32_t phandle = fdt_get_phandle(fdt, findnode_nofail(fdt, target_node_path)); + uint32_t phandle = qemu_devtree_get_phandle(fdt, target_node_path); return qemu_devtree_setprop_cell(fdt, node_path, property, phandle); } diff --git a/device_tree.h b/device_tree.h index 754bd2b2ec..36fc9dbede 100644 --- a/device_tree.h +++ b/device_tree.h @@ -25,6 +25,7 @@ int qemu_devtree_setprop_string(void *fdt, const char *node_path, int qemu_devtree_setprop_phandle(void *fdt, const char *node_path, const char *property, const char *target_node_path); +uint32_t qemu_devtree_get_phandle(void *fdt, const char *path); int qemu_devtree_nop_node(void *fdt, const char *node_path); int qemu_devtree_add_subnode(void *fdt, const char *name);