[PATCH 6.8 491/493] pwm: Fix setting period with #pwm-cells = <1> and of_pwm_single_xlate()

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6.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>

[ Upstream commit 73dfe970c038d0548beccc5bfb2707e1d543b01f ]

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@xxxxxxxxx>
Link: https://lore.kernel.org/r/D05IVTPYH35N.2CLDG6LSILRSN@xxxxxxxxx
Fixes: 40ade0c2e794 ("pwm: Let the of_xlate callbacks accept references without period")
Tested-by: Karel Balej <balejk@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240329103544.545290-2-u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 830a697826af5..9d2dc5e1c8aac 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -443,7 +443,7 @@ 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







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