linux-kernel - [PATCH] pwm: Fix setting period with #pwm-cells = <1> and of_pwm_single

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Message-ID: <20240329103544.545290-2-u.kleine-koenig@pengutronix.de>
Date: Fri, 29 Mar 2024 11:35:40 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Karel Balej <balejk@...fyz.cz>
Cc: regressions@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-pwm@...r.kernel.org
Subject: [PATCH] pwm: Fix setting period with #pwm-cells = <1> and of_pwm_single_xlate()

For drivers making use of of_pwm_single_xlate() (i.e. those that don't
pass a hwpwm index) and also don't pass flags, setting period was
wrongly skipped. This affects the pwm-pxa and ti-sn65dsi86 drivers.

Reported-by: Karel Balej <balejk@...fyz.cz>
Fixes: 40ade0c2e794 ("pwm: Let the of_xlate callbacks accept references without period")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/pwm/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 54a62879fffa..ee3ef3f44bc5 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -512,7 +512,7 @@ of_pwm_single_xlate(struct pwm_chip *chip, const struct of_phandle_args *args)
 	if (IS_ERR(pwm))
 		return pwm;
 
-	if (args->args_count > 1)
+	if (args->args_count > 0)
 		pwm->args.period = args->args[0];
 
 	pwm->args.polarity = PWM_POLARITY_NORMAL;
-- 
2.43.0