linux-kernel - [PATCH 24/44] power/reset: msm-powroff: Register with kernel poweroff handler

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Message-Id: <1412659726-29957-25-git-send-email-linux@roeck-us.net>
Date:	Mon,  6 Oct 2014 22:28:26 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	linux-kernel@...r.kernel.org
Cc:	adi-buildroot-devel@...ts.sourceforge.net,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	lguest@...ts.ozlabs.org, linux-acpi@...r.kernel.org,
	linux-alpha@...r.kernel.org, linux-am33-list@...hat.com,
	linux-cris-kernel@...s.com, linux-efi@...r.kernel.org,
	linux-hexagon@...r.kernel.org, linux-m32r-ja@...linux-m32r.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	openipmi-developer@...ts.sourceforge.net,
	user-mode-linux-devel@...ts.sourceforge.net,
	linux-arm-kernel@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org,
	linux-ia64@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
	linux-metag@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-parisc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-sh@...r.kernel.org, xen-devel@...ts.xenproject.org,
	Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 24/44] power/reset: msm-powroff: Register with kernel poweroff handler

Register with kernel poweroff handler instead of setting pm_power_off
directly. Select proprity 0 since the code does not really poweroff
the system.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/power/reset/msm-poweroff.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/power/reset/msm-poweroff.c b/drivers/power/reset/msm-poweroff.c
index 774f9a3..189bcd3 100644
--- a/drivers/power/reset/msm-poweroff.c
+++ b/drivers/power/reset/msm-poweroff.c
@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
+#include <linux/notifier.h>
 #include <linux/reboot.h>
 
 #include <asm/system_misc.h>
@@ -31,12 +32,19 @@ static void do_msm_restart(enum reboot_mode reboot_mode, const char *cmd)
 	mdelay(10000);
 }
 
-static void do_msm_poweroff(void)
+static int do_msm_poweroff(struct notifier_block *this,
+			   unsigned long unused1, void *unused2)
 {
 	/* TODO: Add poweroff capability */
 	do_msm_restart(REBOOT_HARD, NULL);
+
+	return NOTIFY_DONE;
 }
 
+static struct notifier_block msm_powroff_nb = {
+	.notifier_call = do_msm_poweroff,
+};
+
 static int msm_restart_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -47,7 +55,8 @@ static int msm_restart_probe(struct platform_device *pdev)
 	if (IS_ERR(msm_ps_hold))
 		return PTR_ERR(msm_ps_hold);
 
-	pm_power_off = do_msm_poweroff;
+	if (register_poweroff_handler(&msm_powroff_nb))
+		dev_err(&pdev->dev, "Failed to register poweroff handler\n");
 	arm_pm_restart = do_msm_restart;
 	return 0;
 }
-- 
1.9.1

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