power/reset: hisi: Register with kernel restart handler

Register with kernel restart handler instead of setting arm_pm_restart directly.

Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/power/reset/hisi-reboot.c b/drivers/power/reset/hisi-reboot.c
index 0c91d02..5385460 100644 (file)
--- a/drivers/power/reset/hisi-reboot.c
+++ b/drivers/power/reset/hisi-reboot.c
@@ -14,27 +14,36 @@
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/module.h>
+#include <linux/notifier.h>
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
 
 #include <asm/proc-fns.h>
-#include <asm/system_misc.h>
 
 static void __iomem *base;
 static u32 reboot_offset;
 
-static void hisi_restart(enum reboot_mode mode, const char *cmd)
+static int hisi_restart_handler(struct notifier_block *this,
+                               unsigned long mode, void *cmd)
 {
        writel_relaxed(0xdeadbeef, base + reboot_offset);
 
        while (1)
                cpu_do_idle();
+
+       return NOTIFY_DONE;
 }
 
+static struct notifier_block hisi_restart_nb = {
+       .notifier_call = hisi_restart_handler,
+       .priority = 128,
+};
+
 static int hisi_reboot_probe(struct platform_device *pdev)
 {
        struct device_node *np = pdev->dev.of_node;
+       int err;
 
        base = of_iomap(np, 0);
        if (!base) {
@@ -47,9 +56,12 @@ static int hisi_reboot_probe(struct platform_device *pdev)
                return -EINVAL;
        }
 
-       arm_pm_restart = hisi_restart;
+       err = register_restart_handler(&hisi_restart_nb);
+       if (err)
+               dev_err(&pdev->dev, "cannot register restart handler (err=%d)\n",
+                       err);
 
-       return 0;
+       return err;
 }
 
 static struct of_device_id hisi_reboot_of_match[] = {