linux-kernel - [PATCH 06/28] mfd: pcf50633: Remove #ifdef guards for PM related functions

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Message-Id: <20220807145247.46107-7-paul@crapouillou.net>
Date:   Sun,  7 Aug 2022 16:52:25 +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>
Subject: [PATCH 06/28] mfd: pcf50633: Remove #ifdef guards for PM related functions

Use the new EXPORT_GPL_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() macros
to handle the .suspend/.resume callbacks.

These macros allow the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_SUSPEND 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.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/mfd/pcf50633-core.c       | 22 +---------------------
 drivers/mfd/pcf50633-irq.c        | 13 ++++++++-----
 include/linux/mfd/pcf50633/core.h |  6 ++----
 3 files changed, 11 insertions(+), 30 deletions(-)

diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index e9c565cf0f54..06d750d9a476 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -158,26 +158,6 @@ pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
 	}
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int pcf50633_suspend(struct device *dev)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct pcf50633 *pcf = i2c_get_clientdata(client);
-
-	return pcf50633_irq_suspend(pcf);
-}
-
-static int pcf50633_resume(struct device *dev)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct pcf50633 *pcf = i2c_get_clientdata(client);
-
-	return pcf50633_irq_resume(pcf);
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
-
 static const struct regmap_config pcf50633_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -302,7 +282,7 @@ MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
 static struct i2c_driver pcf50633_driver = {
 	.driver = {
 		.name	= "pcf50633",
-		.pm	= &pcf50633_pm,
+		.pm	= pm_sleep_ptr(&pcf50633_pm),
 	},
 	.id_table = pcf50633_id_table,
 	.probe = pcf50633_probe,
diff --git a/drivers/mfd/pcf50633-irq.c b/drivers/mfd/pcf50633-irq.c
index 2096afb0ce9b..e85af7f1cb0b 100644
--- a/drivers/mfd/pcf50633-irq.c
+++ b/drivers/mfd/pcf50633-irq.c
@@ -7,6 +7,7 @@
  * All rights reserved.
  */
 
+#include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/mutex.h>
@@ -218,10 +219,10 @@ static irqreturn_t pcf50633_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-#ifdef CONFIG_PM
-
-int pcf50633_irq_suspend(struct pcf50633 *pcf)
+static int pcf50633_suspend(struct device *dev)
 {
+	struct i2c_client *client = to_i2c_client(dev);
+	struct pcf50633 *pcf = i2c_get_clientdata(client);
 	int ret;
 	int i;
 	u8 res[5];
@@ -257,8 +258,10 @@ int pcf50633_irq_suspend(struct pcf50633 *pcf)
 	return ret;
 }
 
-int pcf50633_irq_resume(struct pcf50633 *pcf)
+static int pcf50633_resume(struct device *dev)
 {
+	struct i2c_client *client = to_i2c_client(dev);
+	struct pcf50633 *pcf = i2c_get_clientdata(client);
 	int ret;
 
 	/* Write the saved mask registers */
@@ -273,7 +276,7 @@ int pcf50633_irq_resume(struct pcf50633 *pcf)
 	return ret;
 }
 
-#endif
+EXPORT_GPL_SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
 
 int pcf50633_irq_init(struct pcf50633 *pcf, int irq)
 {
diff --git a/include/linux/mfd/pcf50633/core.h b/include/linux/mfd/pcf50633/core.h
index 3f752dc62a6c..539f27f8bd89 100644
--- a/include/linux/mfd/pcf50633/core.h
+++ b/include/linux/mfd/pcf50633/core.h
@@ -13,6 +13,7 @@
 #include <linux/workqueue.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/pm.h>
 #include <linux/power_supply.h>
 #include <linux/mfd/pcf50633/backlight.h>
 
@@ -226,9 +227,6 @@ static inline struct pcf50633 *dev_to_pcf50633(struct device *dev)
 
 int pcf50633_irq_init(struct pcf50633 *pcf, int irq);
 void pcf50633_irq_free(struct pcf50633 *pcf);
-#ifdef CONFIG_PM
-int pcf50633_irq_suspend(struct pcf50633 *pcf);
-int pcf50633_irq_resume(struct pcf50633 *pcf);
-#endif
+extern const struct dev_pm_ops pcf50633_pm;
 
 #endif
-- 
2.35.1