pwm: stm32: 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.c b/drivers/pwm/pwm-stm32.c
index 3303a754ea020fb3300c1e9e2c46346a4709744f..8be037757b8bd311b4350aa035c16d0c3e4deeb8 100644 (file)
--- a/drivers/pwm/pwm-stm32.c
+++ b/drivers/pwm/pwm-stm32.c
@@ -645,7 +645,7 @@ static int stm32_pwm_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int __maybe_unused stm32_pwm_suspend(struct device *dev)
+static int stm32_pwm_suspend(struct device *dev)
 {
        struct stm32_pwm *priv = dev_get_drvdata(dev);
        unsigned int i;
@@ -666,7 +666,7 @@ static int __maybe_unused stm32_pwm_suspend(struct device *dev)
        return pinctrl_pm_select_sleep_state(dev);
 }
 
-static int __maybe_unused stm32_pwm_resume(struct device *dev)
+static int stm32_pwm_resume(struct device *dev)
 {
        struct stm32_pwm *priv = dev_get_drvdata(dev);
        int ret;
@@ -679,7 +679,7 @@ static int __maybe_unused stm32_pwm_resume(struct device *dev)
        return stm32_pwm_apply_breakinputs(priv);
 }
 
-static SIMPLE_DEV_PM_OPS(stm32_pwm_pm_ops, stm32_pwm_suspend, stm32_pwm_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(stm32_pwm_pm_ops, stm32_pwm_suspend, stm32_pwm_resume);
 
 static const struct of_device_id stm32_pwm_of_match[] = {
        { .compatible = "st,stm32-pwm", },
@@ -692,7 +692,7 @@ static struct platform_driver stm32_pwm_driver = {
        .driver = {
                .name = "stm32-pwm",
                .of_match_table = stm32_pwm_of_match,
-               .pm = &stm32_pwm_pm_ops,
+               .pm = pm_ptr(&stm32_pwm_pm_ops),
        },
 };
 module_platform_driver(stm32_pwm_driver);