kernel_optimize_test/drivers/power/reset/msm-poweroff.c
Pramod Gurav 18a702e0de 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>
2014-09-26 19:54:33 +02:00

82 lines
2.0 KiB
C

/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/pm.h>
static void __iomem *msm_ps_hold;
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(&restart_nb, 0, NULL);
}
static int msm_restart_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *mem;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
msm_ps_hold = devm_ioremap_resource(dev, mem);
if (IS_ERR(msm_ps_hold))
return PTR_ERR(msm_ps_hold);
register_restart_handler(&restart_nb);
pm_power_off = do_msm_poweroff;
return 0;
}
static const struct of_device_id of_msm_restart_match[] = {
{ .compatible = "qcom,pshold", },
{},
};
MODULE_DEVICE_TABLE(of, of_msm_restart_match);
static struct platform_driver msm_restart_driver = {
.probe = msm_restart_probe,
.driver = {
.name = "msm-restart",
.of_match_table = of_match_ptr(of_msm_restart_match),
},
};
static int __init msm_restart_init(void)
{
return platform_driver_register(&msm_restart_driver);
}
device_initcall(msm_restart_init);