| /** | |
| * 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); |