linux-kernel - [ 129/175] PM / shmobile: Make TMU driver use pm_genpd_dev_always

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Message-Id: <20120330194852.110621356@linuxfoundation.org>
Date:	Fri, 30 Mar 2012 12:50:34 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, "Rafael J. Wysocki" <rjw@...k.pl>,
	Simon Horman <horms@...ge.net.au>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: [ 129/175] PM / shmobile: Make TMU driver use pm_genpd_dev_always_on()

3.3-stable review patch.  If anyone has any objections, please let me know.

------------------


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

Commit 2ee619f9487c2acc1efdf2c78e68e2bd51b635fa upstream.

Make the TMU clocksource driver mark its device as "always on"
using pm_genpd_dev_always_on() to protect it from surprise power
removals and make sh7372_add_standard_devices() add TMU devices on
sh7372 to the A4R power domain so that their "always on" flags
are taken into account as appropriate.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Tested-by: Simon Horman <horms@...ge.net.au>
Acked-by: Paul Mundt <lethal@...ux-sh.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/mach-shmobile/setup-sh7372.c |    2 ++
 drivers/clocksource/sh_tmu.c          |    4 ++++
 2 files changed, 6 insertions(+)

--- a/arch/arm/mach-shmobile/setup-sh7372.c
+++ b/arch/arm/mach-shmobile/setup-sh7372.c
@@ -1043,6 +1043,8 @@ void __init sh7372_add_standard_devices(
 	sh7372_add_device_to_domain(&sh7372_a4r, &veu2_device);
 	sh7372_add_device_to_domain(&sh7372_a4r, &veu3_device);
 	sh7372_add_device_to_domain(&sh7372_a4r, &jpu_device);
+	sh7372_add_device_to_domain(&sh7372_a4r, &tmu00_device);
+	sh7372_add_device_to_domain(&sh7372_a4r, &tmu01_device);
 }
 
 void __init sh7372_add_early_devices(void)
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -32,6 +32,7 @@
 #include <linux/sh_timer.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/pm_domain.h>
 
 struct sh_tmu_priv {
 	void __iomem *mapbase;
@@ -410,6 +411,9 @@ static int __devinit sh_tmu_probe(struct
 	struct sh_tmu_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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