PWM: core: adopt Linux prototype for struct pwm_ops::apply

In Linux, a pwm_chip can have more one pwm_device, one for each channel.
Therefore, pwm_apply takes a pwm_device as argument to identify, which
channel is the one being operated on.

In barebox, there's a 1:1 relationship between the two, but let's add
pwm_device as extra, so far unused, parameter to make porting kernel
code slightly easier.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20240415053600.370622-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

7 files changed, 18 insertions, 7 deletions

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index ab7e55b000..706c4515e9 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -326,7 +326,7 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
 	if (state->duty_ns > state->period_ns)
 		goto err;
 
-	ret = chip->ops->apply(chip, state);
+	ret = chip->ops->apply(chip, pwm, state);
 err:
 	if (ret == 0)
 		chip->state = *state;
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index 52b5926097..331a6e9712 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -286,7 +286,9 @@ static void atmel_pwm_disable(struct pwm_chip *chip, bool disable_clk)
 		clk_disable(atmel_pwm->clk);
 }
 
-static int atmel_pwm_apply(struct pwm_chip *chip, const struct pwm_state *state)
+static int atmel_pwm_apply(struct pwm_chip *chip,
+			   struct pwm_device *pwm,
+			   const struct pwm_state *state)
 {
 	struct atmel_pwm_chip *atmel_pwm = to_atmel_pwm_chip(chip);
 	struct pwm_state cstate;
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 0b79b0831a..f5e3cbcd7c 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -191,7 +191,9 @@ static void imx_pwm_set_enable_v2(struct pwm_chip *chip, bool enable)
 		imx_pwm_clk_disable_v2(imx);
 }
 
-static int imx_pwm_apply(struct pwm_chip *chip, const struct pwm_state *state)
+static int imx_pwm_apply(struct pwm_chip *chip,
+			 struct pwm_device *pwm,
+			 const struct pwm_state *state)
 {
 	struct imx_chip *imx = to_imx_chip(chip);
 	bool enabled;
diff --git a/drivers/pwm/pwm-mxs.c b/drivers/pwm/pwm-mxs.c
index e94fcf5384..18279bf287 100644
--- a/drivers/pwm/pwm-mxs.c
+++ b/drivers/pwm/pwm-mxs.c
@@ -44,7 +44,9 @@ struct mxs_pwm {
 
 #define to_mxs_pwm_chip(_chip) container_of(_chip, struct mxs_pwm_chip, chip)
 
-static int mxs_pwm_apply(struct pwm_chip *chip, const struct pwm_state *state)
+static int mxs_pwm_apply(struct pwm_chip *chip,
+			 struct pwm_device *pwm,
+			 const struct pwm_state *state)
 {
 	struct mxs_pwm_chip *mxs = to_mxs_pwm_chip(chip);
 	int div = 0;
diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c
index 7c7a8e2ce6..218a270c02 100644
--- a/drivers/pwm/pwm-stm32.c
+++ b/drivers/pwm/pwm-stm32.c
@@ -198,7 +198,9 @@ static void stm32_pwm_disable(struct stm32_pwm *priv, unsigned ch)
 	clk_disable(priv->clk);
 }
 
-static int stm32_pwm_apply(struct pwm_chip *chip, const struct pwm_state *state)
+static int stm32_pwm_apply(struct pwm_chip *chip,
+			   struct pwm_device *pwm,
+			   const struct pwm_state *state)
 {
 	bool enabled;
 	struct stm32_pwm *priv = to_stm32_pwm_dev(chip);
diff --git a/drivers/pwm/pxa_pwm.c b/drivers/pwm/pxa_pwm.c
index 69ff7dfb77..09f36c92dd 100644
--- a/drivers/pwm/pxa_pwm.c
+++ b/drivers/pwm/pxa_pwm.c
@@ -77,7 +77,9 @@ static void pxa_pwm_disable(struct pxa_pwm_chip *pxa_pwm)
  * duty_ns      = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
  * PWM_CLK_RATE = 13 MHz
  */
-static int pxa_pwm_apply(struct pwm_chip *chip, const struct pwm_state *state)
+static int pxa_pwm_apply(struct pwm_chip *chip,
+			 struct pwm_device *pwm,
+			 const struct pwm_state *state)
 {
 	unsigned long long c;
 	unsigned long period_cycles, prescale, pv, dc;
diff --git a/include/pwm.h b/include/pwm.h
index 5157fee7d4..876a242289 100644
--- a/include/pwm.h
+++ b/include/pwm.h
@@ -123,7 +123,8 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state);
 struct pwm_ops {
 	int (*request)(struct pwm_chip *chip);
 	void (*free)(struct pwm_chip *chip);
-	int (*apply)(struct pwm_chip *chip, const struct pwm_state *state);
+	int (*apply)(struct pwm_chip *chip, struct pwm_device *pwm,
+		     const struct pwm_state *state);
 };
 
 /**