linux-kernel - [PATCH 17/28] mfd: wm8994: Remove #ifdef guards for PM related functions

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Date:   Sun,  7 Aug 2022 16:52:36 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>,
        patches@...nsource.cirrus.com
Subject: [PATCH 17/28] mfd: wm8994: Remove #ifdef guards for PM related functions

Use the new RUNTIME_PM_OPS() and pm_ptr() macros to handle the
.runtime_suspend/.runtime_resume callbacks.

These macros allow the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_PM is disabled, without having
to use #ifdef guards.

The advantage is then that these functions are now always compiled
independently of any Kconfig option, and thanks to that bugs and
regressions are easier to catch.

Note that this driver should probably use the new
DEFINE_RUNTIME_DEV_PM_OPS() macro instead, which will provide
.suspend/.resume callbacks, pointing to pm_runtime_force_suspend() and
pm_runtime_force_resume() respectively; unless those callbacks really
aren't needed.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
Cc: patches@...nsource.cirrus.com
---
 drivers/mfd/wm8994-core.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 7b1d270722ba..a27a13b5ae1e 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -110,7 +110,6 @@ static const char *wm8958_main_supplies[] = {
 	"SPKVDD2",
 };

-#ifdef CONFIG_PM
 static int wm8994_suspend(struct device *dev)
 {
 	struct wm8994 *wm8994 = dev_get_drvdata(dev);
@@ -213,7 +212,6 @@ static int wm8994_resume(struct device *dev)

 	return ret;
 }
-#endif

 #ifdef CONFIG_REGULATOR
 static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
@@ -676,13 +674,13 @@ static const struct i2c_device_id wm8994_i2c_id[] = {
 MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);

 static const struct dev_pm_ops wm8994_pm_ops = {
-	SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
+	RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
 };

 static struct i2c_driver wm8994_i2c_driver = {
 	.driver = {
 		.name = "wm8994",
-		.pm = &wm8994_pm_ops,
+		.pm = pm_ptr(&wm8994_pm_ops),
 		.of_match_table = wm8994_of_match,
 	},
 	.probe = wm8994_i2c_probe,
-- 
2.35.1