bcma: get CPU clock

Add method to return the clock of the CPU. This is needed by the arch
code to calculate the mips_hpt_frequency.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/bcma/driver_mips.c

@@ -166,6 +166,18 @@ static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
 	}
 }
 
+u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
+{
+	struct bcma_bus *bus = mcore->core->bus;
+
+	if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
+		return bcma_pmu_get_clockcpu(&bus->drv_cc);
+
+	pr_err("No PMU available, need this to get the cpu clock\n");
+	return 0;
+}
+EXPORT_SYMBOL(bcma_cpu_clock);
+
 static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore)
 {
 	struct bcma_bus *bus = mcore->core->bus;