Messages in this thread Patch in this message | | | From | Wolfram Sang <> | Subject | [PATCH 2/2] pwm: renesas-tpu: don't allow no duty if duty_ns is given | Date | Wed, 15 Sep 2021 08:55:41 +0200 |
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From: Duc Nguyen <duc.nguyen.ub@renesas.com>
We have special code if duty_ns is 0. But if non-zero is given, then the calculation should not result in zero duty.
Signed-off-by: Duc Nguyen <duc.nguyen.ub@renesas.com> [wsa: split and reworded commit message] Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> --- drivers/pwm/pwm-renesas-tpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c index 754440194650..bb51156e4bda 100644 --- a/drivers/pwm/pwm-renesas-tpu.c +++ b/drivers/pwm/pwm-renesas-tpu.c @@ -275,7 +275,7 @@ static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *_pwm, if (duty_ns) { duty = clk_rate / prescalers[prescaler] / (NSEC_PER_SEC / duty_ns); - if (duty > period) + if (duty > period || duty == 0) return -EINVAL; } else { duty = 0; -- 2.30.2
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