[linux-block.git] / arch / powerpc / sysdev / mpc5xxx_clocks.c

// SPDX-License-Identifier: GPL-2.0
/**
 * 	mpc5xxx_get_bus_frequency - Find the bus frequency for a device
 * 	@node:	device node
 *
 * 	Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
 * 	or 0 if the bus frequency cannot be found.
 */

#include <linux/kernel.h>
#include <linux/of_platform.h>
#include <linux/export.h>
#include <asm/mpc5xxx.h>

unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
{
	const unsigned int *p_bus_freq = NULL;

	of_node_get(node);
	while (node) {
		p_bus_freq = of_get_property(node, "bus-frequency", NULL);
		if (p_bus_freq)
			break;

		node = of_get_next_parent(node);
	}
	of_node_put(node);

	return p_bus_freq ? *p_bus_freq : 0;
}
EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
87c441e5 WD	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>
66b15db6	12	#include <linux/export.h>
63410b0b	13	#include <asm/mpc5xxx.h>
87c441e5	14
63410b0b	15	unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
87c441e5	16	{
87c441e5 WD	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
b340587e	25	node = of_get_next_parent(node);
87c441e5	26	}
756d3679	27	of_node_put(node);
87c441e5 WD	28
	29	return p_bus_freq ? *p_bus_freq : 0;
	30	}
	31	EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);