pwm: samsung: Make use of devm_pwmchip_alloc() function

This prepares the pwm-samsung driver to further changes of the pwm core
outlined in the commit introducing devm_pwmchip_alloc(). There is no
intended semantical change and the driver should behave as before.

Link: https://lore.kernel.org/r/f188e68bdea8d5a24277a10c8c9a6350a9c246ac.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
index d3dc9b5b80d62e526626173280f09200d225ec12..efb60c9f0cb33d8994c6887fe57f17de597998cc 100644 (file)
--- a/drivers/pwm/pwm-samsung.c
+++ b/drivers/pwm/pwm-samsung.c
@@ -69,7 +69,6 @@ struct samsung_pwm_channel {
 
 /**
  * struct samsung_pwm_chip - private data of PWM chip
- * @chip:              generic PWM chip
  * @variant:           local copy of hardware variant data
  * @inverter_mask:     inverter status for all channels - one bit per channel
  * @disabled_mask:     disabled status for all channels - one bit per channel
@@ -80,7 +79,6 @@ struct samsung_pwm_channel {
  * @channel:           per channel driver data
  */
 struct samsung_pwm_chip {
-       struct pwm_chip chip;
        struct samsung_pwm_variant variant;
        u8 inverter_mask;
        u8 disabled_mask;
@@ -110,7 +108,7 @@ static DEFINE_SPINLOCK(samsung_pwm_lock);
 static inline
 struct samsung_pwm_chip *to_samsung_pwm_chip(struct pwm_chip *chip)
 {
-       return container_of(chip, struct samsung_pwm_chip, chip);
+       return pwmchip_get_drvdata(chip);
 }
 
 static inline unsigned int to_tcon_channel(unsigned int channel)
@@ -549,14 +547,12 @@ static int pwm_samsung_probe(struct platform_device *pdev)
        unsigned int chan;
        int ret;
 
-       our_chip = devm_kzalloc(&pdev->dev, sizeof(*our_chip), GFP_KERNEL);
-       if (our_chip == NULL)
-               return -ENOMEM;
+       chip = devm_pwmchip_alloc(&pdev->dev, SAMSUNG_PWM_NUM, sizeof(*our_chip));
+       if (IS_ERR(chip))
+               return PTR_ERR(chip);
+       our_chip = to_samsung_pwm_chip(chip);
 
-       chip = &our_chip->chip;
-       chip->dev = &pdev->dev;
        chip->ops = &pwm_samsung_ops;
-       chip->npwm = SAMSUNG_PWM_NUM;
        our_chip->inverter_mask = BIT(SAMSUNG_PWM_NUM) - 1;
 
        if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {