diff mbox series

[v15,04/11] pwm: clps711x: Use 64-bit division macro

Message ID dd03cc467ac3fc470826aef523822b32e15dc929.1590514331.git.gurus@codeaurora.org (mailing list archive)
State New, archived
Headers show
Series Convert PWM period and duty cycle to u64 | expand

Commit Message

Guru Das Srinagesh May 26, 2020, 5:35 p.m. UTC
Since the PWM framework is switching struct pwm_args.period's datatype
to u64, prepare for this transition by using DIV64_U64_ROUND_CLOSEST to
handle a 64-bit divisor.

Cc: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
---
 drivers/pwm/pwm-clps711x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Guru Das Srinagesh May 28, 2020, 8:33 p.m. UTC | #1
On Tue, May 26, 2020 at 10:35:04AM -0700, Guru Das Srinagesh wrote:
> Since the PWM framework is switching struct pwm_args.period's datatype
> to u64, prepare for this transition by using DIV64_U64_ROUND_CLOSEST to
> handle a 64-bit divisor.
> 
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
> ---
>  drivers/pwm/pwm-clps711x.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
> index 924d39a..ba9500a 100644
> --- a/drivers/pwm/pwm-clps711x.c
> +++ b/drivers/pwm/pwm-clps711x.c
> @@ -43,7 +43,7 @@ static void clps711x_pwm_update_val(struct clps711x_chip *priv, u32 n, u32 v)
>  static unsigned int clps711x_get_duty(struct pwm_device *pwm, unsigned int v)
>  {
>  	/* Duty cycle 0..15 max */
> -	return DIV_ROUND_CLOSEST(v * 0xf, pwm->args.period);
> +	return DIV64_U64_ROUND_CLOSEST(v * 0xf, pwm->args.period);
>  }
>  
>  static int clps711x_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
> -- 

Hi Daniel,

Could you please review this patch when you get a chance to?

Thank you.

Guru Das.
Daniel Thompson June 1, 2020, 11:33 a.m. UTC | #2
On Thu, May 28, 2020 at 01:33:41PM -0700, Guru Das Srinagesh wrote:
> On Tue, May 26, 2020 at 10:35:04AM -0700, Guru Das Srinagesh wrote:
> > Since the PWM framework is switching struct pwm_args.period's datatype
> > to u64, prepare for this transition by using DIV64_U64_ROUND_CLOSEST to
> > handle a 64-bit divisor.
> > 
> > Cc: Daniel Thompson <daniel.thompson@linaro.org>
> > Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
> > ---
> >  drivers/pwm/pwm-clps711x.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
> > index 924d39a..ba9500a 100644
> > --- a/drivers/pwm/pwm-clps711x.c
> > +++ b/drivers/pwm/pwm-clps711x.c
> > @@ -43,7 +43,7 @@ static void clps711x_pwm_update_val(struct clps711x_chip *priv, u32 n, u32 v)
> >  static unsigned int clps711x_get_duty(struct pwm_device *pwm, unsigned int v)
> >  {
> >  	/* Duty cycle 0..15 max */
> > -	return DIV_ROUND_CLOSEST(v * 0xf, pwm->args.period);
> > +	return DIV64_U64_ROUND_CLOSEST(v * 0xf, pwm->args.period);
> >  }
> >  
> >  static int clps711x_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
> > -- 
> 
> Hi Daniel,
> 
> Could you please review this patch when you get a chance to?

I don't normally review PWM patches... but this no longer has the bug
there was there when I first read this patch.


Daniel.
diff mbox series

Patch

diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
index 924d39a..ba9500a 100644
--- a/drivers/pwm/pwm-clps711x.c
+++ b/drivers/pwm/pwm-clps711x.c
@@ -43,7 +43,7 @@  static void clps711x_pwm_update_val(struct clps711x_chip *priv, u32 n, u32 v)
 static unsigned int clps711x_get_duty(struct pwm_device *pwm, unsigned int v)
 {
 	/* Duty cycle 0..15 max */
-	return DIV_ROUND_CLOSEST(v * 0xf, pwm->args.period);
+	return DIV64_U64_ROUND_CLOSEST(v * 0xf, pwm->args.period);
 }
 
 static int clps711x_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)