[PATCH 1/4] firmware: psci: switch SYSTEM_OFF to sys-off handler API

[Diogo Ivo]

Replace the legacy pm_power_off hook with the generic sys-off
handler infrastructure.

Convert psci_sys_poweroff() to the sys-off callback prototype and
register it through register_sys_off_handler() with firmware
priority. This removes the direct dependency on pm_power_off and
drops the now-unused <linux/pm.h> include.

This aligns the PSCI poweroff path with the modern system-off
framework used by other firmware and platform drivers.

Signed-off-by: Diogo Ivo <diogo.ivo at tecnico.ulisboa.pt>
---
 drivers/firmware/psci/psci.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index 38ca190d4a22..d6e9721d11e5 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -13,7 +13,6 @@
 #include <linux/errno.h>
 #include <linux/linkage.h>
 #include <linux/of.h>
-#include <linux/pm.h>
 #include <linux/printk.h>
 #include <linux/psci.h>
 #include <linux/reboot.h>
@@ -329,9 +328,11 @@ static struct notifier_block psci_sys_reset_nb = {
 	.priority = 129,
 };
 
-static void psci_sys_poweroff(void)
+static int psci_sys_poweroff(struct sys_off_data *data)
 {
 	invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
+
+	return NOTIFY_DONE;
 }
 
 #ifdef CONFIG_HIBERNATION
@@ -671,7 +672,8 @@ static void __init psci_0_2_set_functions(void)
 
 	register_restart_handler(&psci_sys_reset_nb);
 
-	pm_power_off = psci_sys_poweroff;
+	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_FIRMWARE,
+				 psci_sys_poweroff, NULL);
 }
 
 /*

-- 
2.54.0