From 8257e8ce253db38c54cfffdd40e9097c14838db7 Mon Sep 17 00:00:00 2001
From: Anton Eliasson <anton.eliasson@axis.com>
Date: Thu, 3 Aug 2023 13:26:42 +0200
Subject: [PATCH] tty: serial: samsung: Set missing PM ops for hibernation
 support

References: bsc#1214683 (PREEMPT_RT prerequisite backports)
Patch-mainline: v6.6-rc1
Git-commit: c58f2ae0ee94901da078a60961262df03eab7552

At least freeze, restore and thaw need to be set in order for the driver
to support system hibernation. The existing suspend/resume functions can
be reused since those functions don't touch the device's power state or
wakeup capability. Use the helper macros SET_SYSTEM_SLEEP_PM_OPS and
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS for symmetry with similar drivers.

Signed-off-by: Anton Eliasson <anton.eliasson@axis.com>
Link: https://lore.kernel.org/r/20230803-samsung_tty_pm_ops-v1-1-1ea7be72194d@axis.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 drivers/tty/serial/samsung_tty.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 790a6873d23c..6b8d4b4402e9 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -2169,9 +2169,8 @@ static int s3c24xx_serial_resume_noirq(struct device *dev)
 }
 
 static const struct dev_pm_ops s3c24xx_serial_pm_ops = {
-	.suspend = s3c24xx_serial_suspend,
-	.resume = s3c24xx_serial_resume,
-	.resume_noirq = s3c24xx_serial_resume_noirq,
+	SET_SYSTEM_SLEEP_PM_OPS(s3c24xx_serial_suspend, s3c24xx_serial_resume)
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, s3c24xx_serial_resume_noirq)
 };
 #define SERIAL_SAMSUNG_PM_OPS	(&s3c24xx_serial_pm_ops)