mpc5xxx_clocks.c

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

unsigned int
mpc5xxx_get_bus_frequency(struct device_node *node)
{
    struct device_node *np;
    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;

        np = of_get_parent(node);
        of_node_put(node);
        node = np;
    }
    if (node)
        of_node_put(node);

    return p_bus_freq ? *p_bus_freq : 0;
}
EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);