Messages in this thread | | | Date | Wed, 17 Jun 2020 19:30:31 +0200 | From | Uwe Kleine-König <> | Subject | Re: [PATCH 1/2] video: ssd1307fb: Print PWM period using 64-bit format specifier |
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On Wed, Jun 17, 2020 at 09:18:34AM +0200, Geert Uytterhoeven wrote: > Hi Thierry, > > On Mon, Jun 15, 2020 at 4:17 PM Thierry Reding <thierry.reding@gmail.com> wrote: > > The PWM core will soon change the duty cycle and period of PWMs to 64 > > bits to allow for a broader range of values. Use a 64-bit format > > specifier to avoid a warning when that change is made. > > > > Signed-off-by: Thierry Reding <thierry.reding@gmail.com> > > > --- a/drivers/video/fbdev/ssd1307fb.c > > +++ b/drivers/video/fbdev/ssd1307fb.c > > @@ -312,7 +312,7 @@ static int ssd1307fb_init(struct ssd1307fb_par *par) > > /* Enable the PWM */ > > pwm_enable(par->pwm); > > > > - dev_dbg(&par->client->dev, "Using PWM%d with a %dns period.\n", > > + dev_dbg(&par->client->dev, "Using PWM%d with a %lluns period.\n", > > par->pwm->pwm, pwm_get_period(par->pwm)); > > } > > This change must be done together with changing the return type of > pwm_get_period(), else you will get a compiler warning, and will print a > bogus value.
Right, or we must change to passing (unsigned long long)pwm_get_period(par->pwm), then change the prototype and then drop the cast again.
Best regards Uwe
-- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ | [unhandled content-type:application/pgp-signature] | |