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Date: Sun, 29 Mar 2020 11:28:33 +0200 (CEST) From: Julia Lawall <julia.lawall@...ia.fr> To: "John B. Wyatt IV" <jbwyatt4@...il.com> cc: outreachy-kernel@...glegroups.com, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Payal Kshirsagar <payal.s.kshirsagar.98@...il.com>, dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org Subject: Re: [Outreachy kernel] [PATCH] staging: fbtft: Replace udelay with preferred usleep_range On Sun, 29 Mar 2020, John B. Wyatt IV wrote: > Fix style issue with usleep_range being reported as preferred over > udelay. > > Issue reported by checkpatch. > > Please review. > > As written in Documentation/timers/timers-howto.rst udelay is the > generally preferred API. hrtimers, as noted in the docs, may be too > expensive for this short timer. > > Are the docs out of date, or, is this a checkpatch issue? > > Signed-off-by: John B. Wyatt IV <jbwyatt4@...il.com> > --- > drivers/staging/fbtft/fb_agm1264k-fl.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/fbtft/fb_agm1264k-fl.c b/drivers/staging/fbtft/fb_agm1264k-fl.c > index eeeeec97ad27..019c8cce6bab 100644 > --- a/drivers/staging/fbtft/fb_agm1264k-fl.c > +++ b/drivers/staging/fbtft/fb_agm1264k-fl.c > @@ -85,7 +85,7 @@ static void reset(struct fbtft_par *par) > dev_dbg(par->info->device, "%s()\n", __func__); > > gpiod_set_value(par->gpio.reset, 0); > - udelay(20); > + usleep_range(20, 20); usleep_range should have a range, eg usleep_range(50, 100);. But it is hard to know a priori what the range should be. So it is probably better to leave the code alone. julia > gpiod_set_value(par->gpio.reset, 1); > mdelay(120); > } > -- > 2.25.1 > > -- > You received this message because you are subscribed to the Google Groups "outreachy-kernel" group. > To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@...glegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/20200329092204.770405-1-jbwyatt4%40gmail.com. >
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