1// SPDX-License-Identifier: GPL-2.0
 2/**
 3 * 	mpc5xxx_get_bus_frequency - Find the bus frequency for a device
 4 * 	@node:	device node
 5 *
 6 * 	Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
 7 * 	or 0 if the bus frequency cannot be found.
 8 */
 9
10#include <linux/kernel.h>
11#include <linux/of_platform.h>
12#include <linux/export.h>
13#include <asm/mpc5xxx.h>
14
15unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
 
16{
 
17	const unsigned int *p_bus_freq = NULL;
18
19	of_node_get(node);
20	while (node) {
21		p_bus_freq = of_get_property(node, "bus-frequency", NULL);
22		if (p_bus_freq)
23			break;
24
25		node = of_get_next_parent(node);
 
 
26	}
27	of_node_put(node);
 
28
29	return p_bus_freq ? *p_bus_freq : 0;
30}
31EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);

 
 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
12unsigned int
13mpc5xxx_get_bus_frequency(struct device_node *node)
14{
15	struct device_node *np;
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		np = of_get_parent(node);
25		of_node_put(node);
26		node = np;
27	}
28	if (node)
29		of_node_put(node);
30
31	return p_bus_freq ? *p_bus_freq : 0;
32}
33EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);