From b4b847e95169802b08ea5df6d7dd87fbb2d468aa Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Fri, 9 Jul 2010 16:18:58 -0500 Subject: fdt: Add function to alloc phandle values If we are creating reference (handles) to nodes in a device tree we need to first create a new phandle in node and this needs a new phandle value. So we search through the whole dtb to find the max phandle value and return the next greater value for a new phandle allocation. Signed-off-by: Kumar Gala Acked-by: Gerald Van Baren --- common/fdt_support.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'common') diff --git a/common/fdt_support.c b/common/fdt_support.c index 718b635d99..166f5e145d 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -1151,4 +1151,22 @@ int fdt_node_offset_by_compat_reg(void *blob, const char *compat, return -FDT_ERR_NOTFOUND; } +/** + * fdt_alloc_phandle: Return next free phandle value + * + * @blob: ptr to device tree + */ +int fdt_alloc_phandle(void *blob) +{ + int offset, len, phandle = 0; + const u32 *val; + + for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; + offset = fdt_next_node(blob, offset, NULL)) { + val = fdt_getprop(blob, offset, "linux,phandle", &len); + if (val) + phandle = max(*val, phandle); + } + return phandle + 1; +} -- cgit v1.2.3