linux-kernel - [PATCH 2/3] cpuidle/powernv: Enable idle powernv cpu to call into the cpuidle framework.

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Date:	Tue, 23 Jul 2013 14:31:53 +0530
From:	Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	benh@...nel.crashing.org, linux-pm@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] cpuidle/powernv: Enable idle powernv cpu to call into
 the cpuidle framework.

This patch enables idle powernv cpu to hook on to the cpuidle
framework, if available, else call on to default idle platform
code.

Signed-off-by: Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/setup.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index 84438af..97d0951 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -25,6 +25,7 @@
 #include <linux/of.h>
 #include <linux/interrupt.h>
 #include <linux/bug.h>
+#include <linux/cpuidle.h>
 
 #include <asm/machdep.h>
 #include <asm/firmware.h>
@@ -196,6 +197,15 @@ static int __init pnv_probe(void)
 	return 1;
 }
 
+void powernv_idle(void)
+{
+	/* Hook to cpuidle framework if available, else
+	 * call on default platform idle code
+	 */
+	if (cpuidle_idle_call())
+		power7_idle();
+}
+
 define_machine(powernv) {
 	.name			= "PowerNV",
 	.probe			= pnv_probe,
@@ -205,7 +215,7 @@ define_machine(powernv) {
 	.show_cpuinfo		= pnv_show_cpuinfo,
 	.progress		= pnv_progress,
 	.machine_shutdown	= pnv_shutdown,
-	.power_save             = power7_idle,
+	.power_save             = powernv_idle,
 	.calibrate_decr		= generic_calibrate_decr,
 #ifdef CONFIG_KEXEC
 	.kexec_cpu_down		= pnv_kexec_cpu_down,

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