hwmon: (ltc2947) Switch to EXPORT_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()

These newer PM macros allow the compiler to see what code it can remove
if !CONFIG_PM_SLEEP. This allows the removal of __maybe_unused markings
whilst achieving the same result. In this case it also lets the
structure itself be removed.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220925172759.3573439-9-jic23@kernel.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/ltc2947-core.c

@@ -1120,7 +1120,7 @@ int ltc2947_core_probe(struct regmap *map, const char *name)
 }
 EXPORT_SYMBOL_GPL(ltc2947_core_probe);
 
-static int __maybe_unused ltc2947_resume(struct device *dev)
+static int ltc2947_resume(struct device *dev)
 {
 	struct ltc2947_data *st = dev_get_drvdata(dev);
 	u32 ctrl = 0;
@@ -1149,7 +1149,7 @@ static int __maybe_unused ltc2947_resume(struct device *dev)
 				  LTC2947_CONT_MODE_MASK, LTC2947_CONT_MODE(1));
 }
 
-static int __maybe_unused ltc2947_suspend(struct device *dev)
+static int ltc2947_suspend(struct device *dev)
 {
 	struct ltc2947_data *st = dev_get_drvdata(dev);
 
@@ -1157,8 +1157,7 @@ static int __maybe_unused ltc2947_suspend(struct device *dev)
 				  LTC2947_SHUTDOWN_MASK, 1);
 }
 
-SIMPLE_DEV_PM_OPS(ltc2947_pm_ops, ltc2947_suspend, ltc2947_resume);
-EXPORT_SYMBOL_GPL(ltc2947_pm_ops);
+EXPORT_SIMPLE_DEV_PM_OPS(ltc2947_pm_ops, ltc2947_suspend, ltc2947_resume);
 
 const struct of_device_id ltc2947_of_match[] = {
 	{ .compatible = "adi,ltc2947" },

drivers/hwmon/ltc2947-i2c.c

@@ -36,7 +36,7 @@ static struct i2c_driver ltc2947_driver = {
 	.driver = {
 		.name = "ltc2947",
 		.of_match_table = ltc2947_of_match,
-		.pm = &ltc2947_pm_ops,
+		.pm = pm_sleep_ptr(&ltc2947_pm_ops),
 	},
 	.probe_new = ltc2947_probe,
 	.id_table = ltc2947_id,

drivers/hwmon/ltc2947-spi.c

@@ -38,7 +38,7 @@ static struct spi_driver ltc2947_driver = {
 	.driver = {
 		.name = "ltc2947",
 		.of_match_table = ltc2947_of_match,
-		.pm = &ltc2947_pm_ops,
+		.pm = pm_sleep_ptr(&ltc2947_pm_ops),
 	},
 	.probe = ltc2947_probe,
 	.id_table = ltc2947_id,