pwm: stm32-lp: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions

This macro has the advantage over SIMPLE_DEV_PM_OPS that we don't have to
care about when the functions are actually used, so the corresponding
__maybe_unused can be dropped.

Also make use of pm_ptr() to discard all PM related stuff if CONFIG_PM
isn't enabled.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/drivers/pwm/pwm-stm32-lp.c b/drivers/pwm/pwm-stm32-lp.c
index b67974cc18725189fd1bbc33e1449a68d035757a..439068f3eca18f213ef1f2ce72a6f682a886be97 100644 (file)
--- a/drivers/pwm/pwm-stm32-lp.c
+++ b/drivers/pwm/pwm-stm32-lp.c
@@ -218,7 +218,7 @@ static int stm32_pwm_lp_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int __maybe_unused stm32_pwm_lp_suspend(struct device *dev)
+static int stm32_pwm_lp_suspend(struct device *dev)
 {
        struct stm32_pwm_lp *priv = dev_get_drvdata(dev);
        struct pwm_state state;
@@ -233,13 +233,13 @@ static int __maybe_unused stm32_pwm_lp_suspend(struct device *dev)
        return pinctrl_pm_select_sleep_state(dev);
 }
 
-static int __maybe_unused stm32_pwm_lp_resume(struct device *dev)
+static int stm32_pwm_lp_resume(struct device *dev)
 {
        return pinctrl_pm_select_default_state(dev);
 }
 
-static SIMPLE_DEV_PM_OPS(stm32_pwm_lp_pm_ops, stm32_pwm_lp_suspend,
-                        stm32_pwm_lp_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(stm32_pwm_lp_pm_ops, stm32_pwm_lp_suspend,
+                               stm32_pwm_lp_resume);
 
 static const struct of_device_id stm32_pwm_lp_of_match[] = {
        { .compatible = "st,stm32-pwm-lp", },
@@ -252,7 +252,7 @@ static struct platform_driver stm32_pwm_lp_driver = {
        .driver = {
                .name = "stm32-pwm-lp",
                .of_match_table = stm32_pwm_lp_of_match,
-               .pm = &stm32_pwm_lp_pm_ops,
+               .pm = pm_ptr(&stm32_pwm_lp_pm_ops),
        },
 };
 module_platform_driver(stm32_pwm_lp_driver);