1 // SPDX-License-Identifier: GPL-2.0
3 * mpc5xxx_get_bus_frequency - Find the bus frequency for a device
6 * Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
7 * or 0 if the bus frequency cannot be found.
10 #include <linux/kernel.h>
11 #include <linux/of_platform.h>
12 #include <linux/export.h>
13 #include <asm/mpc5xxx.h>
15 unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
17 const unsigned int *p_bus_freq = NULL;
21 p_bus_freq = of_get_property(node, "bus-frequency", NULL);
25 node = of_get_next_parent(node);
29 return p_bus_freq ? *p_bus_freq : 0;
31 EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);