pwm: sprd: Provide a helper to cast a chip to driver data

Similar to most other PWM drivers provide a static inline function to
calculate driver data from a given pwmchip.

Link: https://lore.kernel.org/r/20230929161918.2410424-8-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c
index dfda2152a7c1895c3bbb87f0b4ecf32251b7bab4..98a36ff7df7bb64fcb9e7be3325cc2da375b1f61 100644 (file)
--- a/drivers/pwm/pwm-sprd.c
+++ b/drivers/pwm/pwm-sprd.c
@@ -40,6 +40,11 @@ struct sprd_pwm_chip {
        struct sprd_pwm_chn chn[SPRD_PWM_CHN_NUM];
 };
 
+static inline struct sprd_pwm_chip* sprd_pwm_from_chip(struct pwm_chip *chip)
+{
+       return container_of(chip, struct sprd_pwm_chip, chip);
+}
+
 /*
  * The list of clocks required by PWM channels, and each channel has 2 clocks:
  * enable clock and pwm clock.
@@ -69,8 +74,7 @@ static void sprd_pwm_write(struct sprd_pwm_chip *spc, u32 hwid,
 static int sprd_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
                              struct pwm_state *state)
 {
-       struct sprd_pwm_chip *spc =
-               container_of(chip, struct sprd_pwm_chip, chip);
+       struct sprd_pwm_chip *spc = sprd_pwm_from_chip(chip);
        struct sprd_pwm_chn *chn = &spc->chn[pwm->hwpwm];
        u32 val, duty, prescale;
        u64 tmp;
@@ -162,8 +166,7 @@ static int sprd_pwm_config(struct sprd_pwm_chip *spc, struct pwm_device *pwm,
 static int sprd_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
                          const struct pwm_state *state)
 {
-       struct sprd_pwm_chip *spc =
-               container_of(chip, struct sprd_pwm_chip, chip);
+       struct sprd_pwm_chip *spc = sprd_pwm_from_chip(chip);
        struct sprd_pwm_chn *chn = &spc->chn[pwm->hwpwm];
        struct pwm_state *cstate = &pwm->state;
        int ret;