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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: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Pramod Gurav 2014-09-25 17:03:51 +05:30 committed by Sebastian Reichel
parent 371bb20d69
commit 18a702e0de
1 changed files with 14 additions and 6 deletions
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20
drivers/power/reset/msm-poweroff.c
View File

@ -20,21 +20,27 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/reboot.h> #include <linux/reboot.h>
#include <linux/pm.h>
#include <asm/system_misc.h>
static void __iomem *msm_ps_hold; static void __iomem *msm_ps_hold;
static int do_msm_restart(struct notifier_block *nb, unsigned long action,
static void do_msm_restart(enum reboot_mode reboot_mode, const char *cmd) void *data)
{ {
writel(0, msm_ps_hold); writel(0, msm_ps_hold);
mdelay(10000); mdelay(10000);
return NOTIFY_DONE;
} }
static struct notifier_block restart_nb = {
.notifier_call = do_msm_restart,
.priority = 128,
};
static void do_msm_poweroff(void) static void do_msm_poweroff(void)
{ {
/* TODO: Add poweroff capability */ /* 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) 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)) if (IS_ERR(msm_ps_hold))
return PTR_ERR(msm_ps_hold); return PTR_ERR(msm_ps_hold);
register_restart_handler(&restart_nb);
pm_power_off = do_msm_poweroff; pm_power_off = do_msm_poweroff;
arm_pm_restart = do_msm_restart;
return 0; return 0;
} }