ARM: EXYNOS: add generic function to calculate cpu number

The address of cpu power registers in pmu is based on cpu number
offsets. This function calculate the same. This is essentially
required in case of multi-cluster SoC's e.g Exynos5420.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h
index 1d13b08..aff23bd 100644 (file)
--- a/arch/arm/mach-exynos/regs-pmu.h
+++ b/arch/arm/mach-exynos/regs-pmu.h
@@ -323,4 +323,13 @@
 
 #define EXYNOS5420_SWRESET_KFC_SEL                             0x3
 
+#include <asm/cputype.h>
+#define MAX_CPUS_IN_CLUSTER    4
+
+static inline unsigned int exynos_pmu_cpunr(unsigned int mpidr)
+{
+       return ((MPIDR_AFFINITY_LEVEL(mpidr, 1) * MAX_CPUS_IN_CLUSTER)
+                + MPIDR_AFFINITY_LEVEL(mpidr, 0));
+}
+
 #endif /* __ASM_ARCH_REGS_PMU_H */