linux-kernel - [PATCH] media: ir-rx51: Switch to atomic PWM API

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Message-ID: <YXqv339PJTHcGxJg@fedora>
Date:   Thu, 28 Oct 2021 11:12:47 -0300
From:   Maíra Canal <maira.canal@....br>
To:     sean@...s.org, mchehab@...nel.org, thierry.reding@...il.com,
        u.kleine-koenig@...gutronix.de, lee.jones@...aro.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pwm@...r.kernel.org
Subject: [PATCH] media: ir-rx51: Switch to atomic PWM API

Remove legacy PWM interface (pwm_config, pwm_enable, pwm_disable) and
replace it for the atomic PWM API.

Signed-off-by: Maíra Canal <maira.canal@....br>
---
 drivers/media/rc/ir-rx51.c | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/drivers/media/rc/ir-rx51.c b/drivers/media/rc/ir-rx51.c
index a0d9c02a7588..7a643a94e181 100644
--- a/drivers/media/rc/ir-rx51.c
+++ b/drivers/media/rc/ir-rx51.c
@@ -19,6 +19,7 @@
 struct ir_rx51 {
 	struct rc_dev *rcdev;
 	struct pwm_device *pwm;
+	struct pwm_state *state;
 	struct hrtimer timer;
 	struct device	     *dev;
 	wait_queue_head_t     wqueue;
@@ -32,22 +33,22 @@ struct ir_rx51 {
 
 static inline void ir_rx51_on(struct ir_rx51 *ir_rx51)
 {
-	pwm_enable(ir_rx51->pwm);
+	ir_rx51->state->enabled = true;
+	pwm_apply_state(ir_rx51->pwm, ir_rx51->state);
 }
 
 static inline void ir_rx51_off(struct ir_rx51 *ir_rx51)
 {
-	pwm_disable(ir_rx51->pwm);
+	ir_rx51->state->enabled = false;
+	pwm_apply_state(ir_rx51->pwm, ir_rx51->state);
 }
 
 static int init_timing_params(struct ir_rx51 *ir_rx51)
 {
-	struct pwm_device *pwm = ir_rx51->pwm;
-	int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, ir_rx51->freq);
+	struct pwm_state *state = ir_rx51->state;
 
-	duty = DIV_ROUND_CLOSEST(ir_rx51->duty_cycle * period, 100);
-
-	pwm_config(pwm, duty, period);
+	state->period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, ir_rx51->freq);
+	pwm_set_relative_duty_cycle(state, ir_rx51->duty_cycle, 100);
 
 	return 0;
 }
@@ -154,6 +155,8 @@ static int ir_rx51_open(struct rc_dev *dev)
 		return res;
 	}
 
+	pwm_init_state(ir_rx51->pwm, ir_rx51->state);
+
 	return 0;
 }
 
@@ -232,13 +235,9 @@ static int ir_rx51_probe(struct platform_device *dev)
 	struct rc_dev *rcdev;
 
 	pwm = pwm_get(&dev->dev, NULL);
-	if (IS_ERR(pwm)) {
-		int err = PTR_ERR(pwm);
-
-		if (err != -EPROBE_DEFER)
-			dev_err(&dev->dev, "pwm_get failed: %d\n", err);
-		return err;
-	}
+	if (IS_ERR(pwm))
+		return dev_err_probe(&dev->dev, PTR_ERR(pwm), "pwm_get failed: %ld\n",
+				PTR_ERR(pwm));
 
 	/* Use default, in case userspace does not set the carrier */
 	ir_rx51.freq = DIV_ROUND_CLOSEST_ULL(pwm_get_period(pwm), NSEC_PER_SEC);
-- 
2.31.1