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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
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

40
drivers/power/reset/vexpress-poweroff.c
View file

@ -12,14 +12,14 @@
*/ */
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_device.h> #include <linux/of_device.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/stat.h> #include <linux/stat.h>
#include <linux/vexpress.h> #include <linux/vexpress.h>
#include <asm/system_misc.h>
static void vexpress_reset_do(struct device *dev, const char *what) static void vexpress_reset_do(struct device *dev, const char *what)
{ {
int err = -ENOENT; int err = -ENOENT;
@ -43,11 +43,19 @@ static void vexpress_power_off(void)
static struct device *vexpress_restart_device; 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"); 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, static ssize_t vexpress_reset_active_show(struct device *dev,
struct device_attribute *attr, char *buf) 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) static int vexpress_reset_probe(struct platform_device *pdev)
{ {
enum vexpress_reset_func func; enum vexpress_reset_func func;
const struct of_device_id *match = const struct of_device_id *match =
of_match_device(vexpress_reset_of_match, &pdev->dev); of_match_device(vexpress_reset_of_match, &pdev->dev);
struct regmap *regmap; struct regmap *regmap;
int ret = 0;
if (match) if (match)
func = (enum vexpress_reset_func)match->data; func = (enum vexpress_reset_func)match->data;
@ -110,18 +134,14 @@ static int vexpress_reset_probe(struct platform_device *pdev)
break; break;
case FUNC_RESET: case FUNC_RESET:
if (!vexpress_restart_device) if (!vexpress_restart_device)
vexpress_restart_device = &pdev->dev; ret = _vexpress_register_restart_handler(&pdev->dev);
arm_pm_restart = vexpress_restart;
device_create_file(&pdev->dev, &dev_attr_active);
break; break;
case FUNC_REBOOT: case FUNC_REBOOT:
vexpress_restart_device = &pdev->dev; ret = _vexpress_register_restart_handler(&pdev->dev);
arm_pm_restart = vexpress_restart;
device_create_file(&pdev->dev, &dev_attr_active);
break; break;
}; };
return 0; return ret;
} }
static const struct platform_device_id vexpress_reset_id_table[] = { static const struct platform_device_id vexpress_reset_id_table[] = {