Release 4.14 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;
}
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EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);
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Directory: arch/powerpc/sysdev

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