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Commit 18a702e0 authored by Pramod Gurav's avatar Pramod Gurav Committed by Sebastian Reichel
Browse files

power: reset: use restart_notifier mechanism for msm-poweroff 



This change replaces use of arm_pm_restart with recently introduced
reset mechanism in Linux kernel called restart_notifier.

Choosing priority 128, which is default priority, as according to
documentation, this mechanism is sufficient to restart the entire system.

Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Josh Cartwright <joshc@codeaurora.org>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-pm@vger.kernel.org

Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarPramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent 371bb20d

drivers/power/reset/msm-poweroff.c

+14 −6
Original line number Diff line number Diff line
@@ -20,21 +20,27 @@ 
#include <linux/platform_device.h>

#include <linux/module.h>

#include <linux/reboot.h>



#include <asm/system_misc.h>

#include <linux/pm.h>



static void __iomem *msm_ps_hold;



static void do_msm_restart(enum reboot_mode reboot_mode, const char *cmd)

static int do_msm_restart(struct notifier_block *nb, unsigned long action,

			   void *data)

{

	writel(0, msm_ps_hold);

	mdelay(10000);



	return NOTIFY_DONE;

}



static struct notifier_block restart_nb = {

	.notifier_call = do_msm_restart,

	.priority = 128,

};



static void do_msm_poweroff(void)

{

	/* TODO: Add poweroff capability */

	do_msm_restart(REBOOT_HARD, NULL);

	do_msm_restart(&restart_nb, 0, NULL);

}



static int msm_restart_probe(struct platform_device *pdev)
@@ -47,8 +53,10 @@ static int msm_restart_probe(struct platform_device *pdev) 
	if (IS_ERR(msm_ps_hold))

		return PTR_ERR(msm_ps_hold);



	register_restart_handler(&restart_nb);



	pm_power_off = do_msm_poweroff;

	arm_pm_restart = do_msm_restart;



	return 0;

}