linux-kernel - [PATCH] staging: fbtft: Replace udelay with preferred usleep

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Message-Id: <20200329092204.770405-1-jbwyatt4@gmail.com>
Date:   Sun, 29 Mar 2020 02:22:04 -0700
From:   "John B. Wyatt IV" <jbwyatt4@...il.com>
To:     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
Cc:     "John B. Wyatt IV" <jbwyatt4@...il.com>
Subject: [PATCH] staging: fbtft: Replace udelay with preferred usleep_range

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Are the docs out of date, or, is this a checkpatch issue?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);
 	gpiod_set_value(par->gpio.reset, 1);
 	mdelay(120);
 }
-- 
2.25.1