linux-kernel - [PATCH 6/6] PM / shmobile: Make MTU2 driver use pm_genpd_dev_always

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Message-Id: <201203130128.05357.rjw@sisk.pl>
Date:	Tue, 13 Mar 2012 01:28:05 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Linux-sh list" <linux-sh@...r.kernel.org>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Cao Minh Hiep <hiepcm@...il.com>
Subject: [PATCH 6/6] PM / shmobile: Make MTU2 driver use pm_genpd_dev_always_on()

From: Rafael J. Wysocki <rjw@...k.pl>

Make the MTU2 clocksource driver mark its device as "always on"
using pm_genpd_dev_always_on() to protect it from surprise power
removals.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/clocksource/sh_mtu2.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux/drivers/clocksource/sh_mtu2.c
===================================================================
--- linux.orig/drivers/clocksource/sh_mtu2.c
+++ linux/drivers/clocksource/sh_mtu2.c
@@ -31,6 +31,7 @@
 #include <linux/sh_timer.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/pm_domain.h>
 
 struct sh_mtu2_priv {
 	void __iomem *mapbase;
@@ -306,6 +307,9 @@ static int __devinit sh_mtu2_probe(struc
 	struct sh_mtu2_priv *p = platform_get_drvdata(pdev);
 	int ret;
 
+	if (!is_early_platform_device(pdev))
+		pm_genpd_dev_always_on(&pdev->dev, true);
+
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
 		return 0;

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