pwm: simplify getting .drvdata

We should get drvdata from struct device directly. Going via
platform_device is an unneeded step back and forth.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-atmel-tcb.c

@@ -460,8 +460,7 @@ MODULE_DEVICE_TABLE(of, atmel_tcb_pwm_dt_ids);
 #ifdef CONFIG_PM_SLEEP
 static int atmel_tcb_pwm_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);
+	struct atmel_tcb_pwm_chip *tcbpwm = dev_get_drvdata(dev);
 	void __iomem *base = tcbpwm->tc->regs;
 	int i;
 
@@ -478,8 +477,7 @@ static int atmel_tcb_pwm_suspend(struct device *dev)
 
 static int atmel_tcb_pwm_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);
+	struct atmel_tcb_pwm_chip *tcbpwm = dev_get_drvdata(dev);
 	void __iomem *base = tcbpwm->tc->regs;
 	int i;
 

drivers/pwm/pwm-rcar.c

@@ -261,8 +261,7 @@ MODULE_DEVICE_TABLE(of, rcar_pwm_of_table);
 #ifdef CONFIG_PM_SLEEP
 static struct pwm_device *rcar_pwm_dev_to_pwm_dev(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct rcar_pwm_chip *rcar_pwm = platform_get_drvdata(pdev);
+	struct rcar_pwm_chip *rcar_pwm = dev_get_drvdata(dev);
 	struct pwm_chip *chip = &rcar_pwm->chip;
 
 	return &chip->pwms[0];