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power/reset: vexpress: Register with kernel restart handler

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Use the kernel restart handler instead of setting arm_pm_restart directly.
This allows for more than one restart handler in the system.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2014-09-30 10:48:27 -07:00 committed by Sebastian Reichel
parent b8e64eea41
commit 46c99ac662
1 changed files with 30 additions and 10 deletions
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40
drivers/power/reset/vexpress-poweroff.c
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@ -12,14 +12,14 @@
*/
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/stat.h>
#include <linux/vexpress.h>
#include <asm/system_misc.h>
static void vexpress_reset_do(struct device *dev, const char *what)
{
int err = -ENOENT;
@ -43,11 +43,19 @@ static void vexpress_power_off(void)
static struct device *vexpress_restart_device;
static void vexpress_restart(enum reboot_mode reboot_mode, const char *cmd)
static int vexpress_restart(struct notifier_block *this, unsigned long mode,
void *cmd)
{
vexpress_reset_do(vexpress_restart_device, "restart");
return NOTIFY_DONE;
}
static struct notifier_block vexpress_restart_nb = {
.notifier_call = vexpress_restart,
.priority = 128,
};
static ssize_t vexpress_reset_active_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -86,12 +94,28 @@ static struct of_device_id vexpress_reset_of_match[] = {
{}
};
static int _vexpress_register_restart_handler(struct device *dev)
{
int err;
vexpress_restart_device = dev;
err = register_restart_handler(&vexpress_restart_nb);
if (err) {
dev_err(dev, "cannot register restart handler (err=%d)\n", err);
return err;
}
device_create_file(dev, &dev_attr_active);
return 0;
}
static int vexpress_reset_probe(struct platform_device *pdev)
{
enum vexpress_reset_func func;
const struct of_device_id *match =
of_match_device(vexpress_reset_of_match, &pdev->dev);
struct regmap *regmap;
int ret = 0;
if (match)
func = (enum vexpress_reset_func)match->data;
@ -110,18 +134,14 @@ static int vexpress_reset_probe(struct platform_device *pdev)
break;
case FUNC_RESET:
if (!vexpress_restart_device)
vexpress_restart_device = &pdev->dev;
arm_pm_restart = vexpress_restart;
device_create_file(&pdev->dev, &dev_attr_active);
ret = _vexpress_register_restart_handler(&pdev->dev);
break;
case FUNC_REBOOT:
vexpress_restart_device = &pdev->dev;
arm_pm_restart = vexpress_restart;
device_create_file(&pdev->dev, &dev_attr_active);
ret = _vexpress_register_restart_handler(&pdev->dev);
break;
};
return 0;
return ret;
}
static const struct platform_device_id vexpress_reset_id_table[] = {