[PATCH v5] auxdisplay: arm-charlcd: Use DEFINE_SIMPLE_DEV_PM_OPS for power management

[Li Jun]

Replace the manually defined dev_pm_ops structure with the
DEFINE_SIMPLE_DEV_PM_OPS macro to simplify the power management
code, pm_sleep_ptr() to safely drop the references without
triggering compiler warnings. This macro automatically handles
CONFIG_PM_SLEEP configuration and generates freeze/thaw/poweroff/restore
callbacks, reducing boilerplate code.

Signed-off-by: Li Jun <lijun01@xxxxxxxxxx>

---
Changes:
-Replace SIMPLE_DEV_PM_OPS() in v1 v2 with DEFINE_SIMPLE_DEV_PM_OPS() for pm.
-Corrected grammar errors in v1 v3 comment.
-Add a description of pm_sleep_ptr().
---
 drivers/auxdisplay/arm-charlcd.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/auxdisplay/arm-charlcd.c b/drivers/auxdisplay/arm-charlcd.c
index 70efda4f767e..cdd6a0bfca05 100644
--- a/drivers/auxdisplay/arm-charlcd.c
+++ b/drivers/auxdisplay/arm-charlcd.c
@@ -306,10 +306,7 @@ static int charlcd_resume(struct device *dev)
 	return 0;
 }
 
-static const struct dev_pm_ops charlcd_pm_ops = {
-	.suspend = charlcd_suspend,
-	.resume = charlcd_resume,
-};
+static DEFINE_SIMPLE_DEV_PM_OPS(charlcd_pm_ops, charlcd_suspend, charlcd_resume);
 
 static const struct of_device_id charlcd_match[] = {
 	{ .compatible = "arm,versatile-lcd", },
-- 
2.25.1