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From: Chander Kashyap <chander.kashyap@linaro.org>
To: linux-samsung-soc@vger.kernel.org
Cc: kgene.kim@samsung.com, tomasz.figa@gmail.com,
	Chander Kashyap <chander.kashyap@linaro.org>,
	Chander Kashyap <k.chander@samsung.com>
Subject: [PATCH] arm: exynos: add generic function to calculate cpu number
Date: Fri, 25 Apr 2014 11:14:13 +0530	[thread overview]
Message-ID: <1398404653-14407-1-git-send-email-chander.kashyap@linaro.org> (raw)

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 multicluster SoC's e.g Exynos5420.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Chander Kashyap <k.chander@samsung.com>
---
 arch/arm/mach-exynos/regs-pmu.h |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h
index 4f6a256..217da2e 100644
--- a/arch/arm/mach-exynos/regs-pmu.h
+++ b/arch/arm/mach-exynos/regs-pmu.h
@@ -313,4 +313,13 @@
 
 #define EXYNOS5_OPTION_USE_RETENTION				(1 << 4)
 
+#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 */
-- 
1.7.9.5

             reply	other threads:[~2014-04-25  5:44 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-25  5:44 Chander Kashyap [this message]
2014-05-05  4:07 ` [PATCH] arm: exynos: add generic function to calculate cpu number Chander Kashyap
2014-05-09  7:50   ` Chander Kashyap
2014-05-09  8:17     ` Tomasz Figa
2014-05-09  8:34       ` Chander Kashyap
2014-05-14  8:01         ` Chander Kashyap

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