1/**
2 * 	mpc5xxx_get_bus_frequency - Find the bus frequency for a device
3 * 	@node:	device node
4 *
5 * 	Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
6 * 	or 0 if the bus frequency cannot be found.
7 */
8
9#include <linux/kernel.h>
10#include <linux/of_platform.h>
11#include <linux/export.h>
12#include <asm/mpc5xxx.h>
13
14unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
15{
16	const unsigned int *p_bus_freq = NULL;
17
18	of_node_get(node);
19	while (node) {
20		p_bus_freq = of_get_property(node, "bus-frequency", NULL);
21		if (p_bus_freq)
22			break;
23
24		node = of_get_next_parent(node);
25	}
26	of_node_put(node);
27
28	return p_bus_freq ? *p_bus_freq : 0;
29}
30EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);
31