linux-kernel - [PATCH 3/4]: ACPI/ARM: Register for cpuidle_pm_idle in drivers/acpi/processor_idle.c and arch/arm/mach-kirkwood/cpuidle.c

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Message-ID: <20090827115536.GD24986@linux.vnet.ibm.com>
Date:	Thu, 27 Aug 2009 17:25:36 +0530
From:	Arun R Bharadwaj <arun@...ux.vnet.ibm.com>
To:	Joel Schopp <jschopp@...tin.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Arun Bharadwaj <arun@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 3/4]: ACPI/ARM: Register for cpuidle_pm_idle in
	drivers/acpi/processor_idle.c and arch/arm/mach-kirkwood/cpuidle.c

* Arun R Bharadwaj <arun@...ux.vnet.ibm.com> [2009-08-27 17:19:08]:

Set the idle routine to cpuidle_pm_idle after registering cpuidle
devices. Earlier pm_idle was assumed as the defualt idle loop by
cpuidle infrastructure. This is changed to an architecture independent
cpuidle_pm_idle.

There are 2 instances which are using cpuidle infrastructure currently.
This patch makes the change in both the places.

Signed-off-by: Arun R Bharadwaj <arun@...ux.vnet.ibm.com>
---
 arch/arm/mach-kirkwood/cpuidle.c |    6 ++++++
 drivers/acpi/processor_idle.c    |    5 +++++
 2 files changed, 11 insertions(+)

Index: linux.trees.git/arch/arm/mach-kirkwood/cpuidle.c
===================================================================
--- linux.trees.git.orig/arch/arm/mach-kirkwood/cpuidle.c
+++ linux.trees.git/arch/arm/mach-kirkwood/cpuidle.c
@@ -90,6 +90,12 @@ static int kirkwood_init_cpuidle(void)
 		printk(KERN_ERR "kirkwood_init_cpuidle: Failed registering\n");
 		return -EIO;
 	}
+
+	if (pm_idle != cpuidle_pm_idle) {
+		printk(KERN_INFO "using cpuidle idle loop\n");
+		pm_idle = cpuidle_pm_idle;
+	}
+
 	return 0;
 }
 
Index: linux.trees.git/drivers/acpi/processor_idle.c
===================================================================
--- linux.trees.git.orig/drivers/acpi/processor_idle.c
+++ linux.trees.git/drivers/acpi/processor_idle.c
@@ -1216,6 +1216,11 @@ int __cpuinit acpi_processor_power_init(
 				printk(" C%d[C%d]", i,
 				       pr->power.states[i].type);
 		printk(")\n");
+
+		if (pm_idle != cpuidle_pm_idle) {
+			printk(KERN_INFO "using cpuidle idle loop\n");
+			pm_idle = cpuidle_pm_idle;
+		}
 	}
 
 	/* 'power' [R] */
--
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