spi: st: Switch from CONFIG_PM_SLEEP guards to pm_sleep_ptr()

Letting the compiler remove these functions when the kernel is built
without CONFIG_PM_SLEEP support is simpler and less error prone than the
use of #ifdef based kernel configuration guards.

Signed-off-by: Raphael Gallais-Pou <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: GallaisPoutine

drivers/spi/spi-st-ssc4.c

@@ -378,8 +378,7 @@ static void spi_st_remove(struct platform_device *pdev)
 	pinctrl_pm_select_sleep_state(&pdev->dev);
 }
 
-#ifdef CONFIG_PM
-static int spi_st_runtime_suspend(struct device *dev)
+static int __maybe_unused spi_st_runtime_suspend(struct device *dev)
 {
 	struct spi_controller *host = dev_get_drvdata(dev);
 	struct spi_st *spi_st = spi_controller_get_devdata(host);
@@ -392,7 +391,7 @@ static int spi_st_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int spi_st_runtime_resume(struct device *dev)
+static int __maybe_unused spi_st_runtime_resume(struct device *dev)
 {
 	struct spi_controller *host = dev_get_drvdata(dev);
 	struct spi_st *spi_st = spi_controller_get_devdata(host);
@@ -403,10 +402,8 @@ static int spi_st_runtime_resume(struct device *dev)
 
 	return ret;
 }
-#endif
 
-#ifdef CONFIG_PM_SLEEP
-static int spi_st_suspend(struct device *dev)
+static int __maybe_unused spi_st_suspend(struct device *dev)
 {
 	struct spi_controller *host = dev_get_drvdata(dev);
 	int ret;
@@ -418,7 +415,7 @@ static int spi_st_suspend(struct device *dev)
 	return pm_runtime_force_suspend(dev);
 }
 
-static int spi_st_resume(struct device *dev)
+static int __maybe_unused spi_st_resume(struct device *dev)
 {
 	struct spi_controller *host = dev_get_drvdata(dev);
 	int ret;
@@ -429,7 +426,6 @@ static int spi_st_resume(struct device *dev)
 
 	return pm_runtime_force_resume(dev);
 }
-#endif
 
 static const struct dev_pm_ops spi_st_pm = {
 	SET_SYSTEM_SLEEP_PM_OPS(spi_st_suspend, spi_st_resume)
@@ -445,7 +441,7 @@ MODULE_DEVICE_TABLE(of, stm_spi_match);
 static struct platform_driver spi_st_driver = {
 	.driver = {
 		.name = "spi-st",
-		.pm = &spi_st_pm,
+		.pm = pm_sleep_ptr(&spi_st_pm),
 		.of_match_table = of_match_ptr(stm_spi_match),
 	},
 	.probe = spi_st_probe,