powerpc/perf: Fix IMC_MAX_PMU macro

[linux-2.6-microblaze.git] / arch / powerpc / platforms / powernv / opal-imc.c

diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c
index b150f4d..465ea10 100644 (file)
--- a/arch/powerpc/platforms/powernv/opal-imc.c
+++ b/arch/powerpc/platforms/powernv/opal-imc.c
@@ -153,6 +153,22 @@ static void disable_core_pmu_counters(void)
        put_online_cpus();
 }
 
+int get_max_nest_dev(void)
+{
+       struct device_node *node;
+       u32 pmu_units = 0, type;
+
+       for_each_compatible_node(node, NULL, IMC_DTB_UNIT_COMPAT) {
+               if (of_property_read_u32(node, "type", &type))
+                       continue;
+
+               if (type == IMC_TYPE_CHIP)
+                       pmu_units++;
+       }
+
+       return pmu_units;
+}
+
 static int opal_imc_counters_probe(struct platform_device *pdev)
 {
        struct device_node *imc_dev = pdev->dev.of_node;