Register with kernel power-off handler instead of setting pm_power_off
directly. Select default priority to reflect that the original code sets
pm_power_off unconditionally.

Acked-by: Sebastian Reichel <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
---
v5:
- Rebase to v3.18-rc3
v4:
- Do not use notifiers but internal functions and data structures to manage
  the list of power-off handlers. Drop unused parameters from callbacks, and
  make the power-off function type void
v3:
- Replace poweroff in all newly introduced variables and in text
  with power_off or power-off as appropriate
- Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx
v2:
- Use define to specify poweroff handler priority

 drivers/power/reset/vexpress-poweroff.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/power/reset/vexpress-poweroff.c 
b/drivers/power/reset/vexpress-poweroff.c
index 4dc102e2..ee1bcb5 100644
--- a/drivers/power/reset/vexpress-poweroff.c
+++ b/drivers/power/reset/vexpress-poweroff.c
@@ -36,11 +36,16 @@ static void vexpress_reset_do(struct device *dev, const 
char *what)
 
 static struct device *vexpress_power_off_device;
 
-static void vexpress_power_off(void)
+static void vexpress_power_off(struct power_off_handler_block *this)
 {
        vexpress_reset_do(vexpress_power_off_device, "power off");
 }
 
+static struct power_off_handler_block vexpress_power_off_hb = {
+       .handler = vexpress_power_off,
+       .priority = POWER_OFF_PRIORITY_DEFAULT,
+};
+
 static struct device *vexpress_restart_device;
 
 static void vexpress_restart(enum reboot_mode reboot_mode, const char *cmd)
@@ -92,6 +97,7 @@ static int vexpress_reset_probe(struct platform_device *pdev)
        const struct of_device_id *match =
                        of_match_device(vexpress_reset_of_match, &pdev->dev);
        struct regmap *regmap;
+       int ret;
 
        if (match)
                func = (enum vexpress_reset_func)match->data;
@@ -106,7 +112,12 @@ static int vexpress_reset_probe(struct platform_device 
*pdev)
        switch (func) {
        case FUNC_SHUTDOWN:
                vexpress_power_off_device = &pdev->dev;
-               pm_power_off = vexpress_power_off;
+               ret = register_power_off_handler(&vexpress_power_off_hb);
+               if (ret) {
+                       dev_err(&pdev->dev,
+                               "Failed to register power-off handler\n");
+                       return ret;
+               }
                break;
        case FUNC_RESET:
                if (!vexpress_restart_device)
-- 
1.9.1

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