1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/kernel.h>
4 #include <linux/export.h>
5 #include <linux/property.h>
7 #include <asm/mpc5xxx.h>
10 * mpc5xxx_fwnode_get_bus_frequency - Find the bus frequency for a firmware node
11 * @fwnode: firmware node
13 * Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
14 * or 0 if the bus frequency cannot be found.
16 unsigned long mpc5xxx_fwnode_get_bus_frequency(struct fwnode_handle *fwnode)
18 struct fwnode_handle *parent;
22 ret = fwnode_property_read_u32(fwnode, "bus-frequency", &bus_freq);
26 fwnode_for_each_parent_node(fwnode, parent) {
27 ret = fwnode_property_read_u32(parent, "bus-frequency", &bus_freq);
29 fwnode_handle_put(parent);
36 EXPORT_SYMBOL(mpc5xxx_fwnode_get_bus_frequency);