linux-kernel - [PATCH v3] media: ir-rx51: Switch to atomic PWM API

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Date:   Thu, 4 Nov 2021 15:50:18 -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 v3] 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>
---
V1 -> V2: Remove conceptually wrong chunk of code and correct the position
of pwm_init_state function
V2 -> V3: Fix NULL pointer exception
---
 drivers/media/rc/ir-rx51.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/media/rc/ir-rx51.c b/drivers/media/rc/ir-rx51.c
index a0d9c02a7588..a3b145183260 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 +33,20 @@ 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);
-
-	duty = DIV_ROUND_CLOSEST(ir_rx51->duty_cycle * period, 100);
-
-	pwm_config(pwm, duty, period);
+	ir_rx51->state.period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, ir_rx51->freq);
+	pwm_set_relative_duty_cycle(&ir_rx51->state, ir_rx51->duty_cycle, 100);
 
 	return 0;
 }
@@ -242,6 +241,7 @@ static int ir_rx51_probe(struct platform_device *dev)
 
 	/* Use default, in case userspace does not set the carrier */
 	ir_rx51.freq = DIV_ROUND_CLOSEST_ULL(pwm_get_period(pwm), NSEC_PER_SEC);
+	pwm_init_state(pwm, &ir_rx51.state);
 	pwm_put(pwm);
 
 	hrtimer_init(&ir_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-- 
2.31.1