> Am 10.07.2020 um 12:27 schrieb Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>:
>
> When commit 9017dc4fbd59 ("pwm: jz4740: Enhance precision in calculation
> of duty cycle") from v5.8-rc1 was backported to v5.4.x its dependency on
> commit ce1f9cece057 ("pwm: jz4740: Use clocks from TCU driver") was not
> noticed which made the pwm-jz4740 driver fail to build.
Please can you add my "reported by?"
> As ce1f9cece057 depends on still more rework, just backport a small part
> of this commit to make the driver build again. (There is no dependency
> on the functionality introduced in ce1f9cece057, just the rate variable
> is needed.)
BR and thanks,
Nikolaus
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
> ---
> Hello,
>
> @Paul: Can you please check this is correct? I only build-tested this
> change.
>
> Best regards
> Uwe
>
> drivers/pwm/pwm-jz4740.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
> index d0f5c69930d0..77c28313e95f 100644
> --- a/drivers/pwm/pwm-jz4740.c
> +++ b/drivers/pwm/pwm-jz4740.c
> @@ -92,11 +92,12 @@ static int jz4740_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
> {
> struct jz4740_pwm_chip *jz4740 = to_jz4740(pwm->chip);
> unsigned long long tmp;
> - unsigned long period, duty;
> + unsigned long rate, period, duty;
> unsigned int prescaler = 0;
> uint16_t ctrl;
>
> - tmp = (unsigned long long)clk_get_rate(jz4740->clk) * state->period;
> + rate = clk_get_rate(jz4740->clk);
> + tmp = rate * state->period;
> do_div(tmp, 1000000000);
> period = tmp;
>
> --
> 2.27.0
>
