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

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Message-ID: <YslTQLhM7GSaGXki@mandalorian.koija>
Date:   Sat, 9 Jul 2022 13:06:56 +0300
From:   Christos Kollintzas <c.kollintzas.92@...il.com>
To:     gregkh@...uxfoundation.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH] staging: fbtft: replace udelay with usleep_range

Adhere to Linux kernel coding style.

Reported by checkpatch:

CHECK: usleep_range is preferred over udelay

Signed-off-by: Christos Kollintzas <c.kollintzas.92@...il.com>
---
 drivers/staging/fbtft/fb_upd161704.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/fbtft/fb_upd161704.c b/drivers/staging/fbtft/fb_upd161704.c
index c680160d6380..eeafbab4ace1 100644
--- a/drivers/staging/fbtft/fb_upd161704.c
+++ b/drivers/staging/fbtft/fb_upd161704.c
@@ -32,27 +32,27 @@ static int init_display(struct fbtft_par *par)
 
 	/* oscillator start */
 	write_reg(par, 0x003A, 0x0001);	/*Oscillator 0: stop, 1: operation */
-	udelay(100);
+	usleep_range(100, 110);
 
 	/* y-setting */
 	write_reg(par, 0x0024, 0x007B);	/* amplitude setting */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0025, 0x003B);	/* amplitude setting */
 	write_reg(par, 0x0026, 0x0034);	/* amplitude setting */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0027, 0x0004);	/* amplitude setting */
 	write_reg(par, 0x0052, 0x0025);	/* circuit setting 1 */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0053, 0x0033);	/* circuit setting 2 */
 	write_reg(par, 0x0061, 0x001C);	/* adjustment V10 positive polarity */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0062, 0x002C);	/* adjustment V9 negative polarity */
 	write_reg(par, 0x0063, 0x0022);	/* adjustment V34 positive polarity */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0064, 0x0027);	/* adjustment V31 negative polarity */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0065, 0x0014);	/* adjustment V61 negative polarity */
-	udelay(10);
+	usleep_range(10, 15);
 	write_reg(par, 0x0066, 0x0010);	/* adjustment V61 negative polarity */
 
 	/* Basical clock for 1 line (BASECOUNT[7:0]) number specified */
@@ -60,7 +60,7 @@ static int init_display(struct fbtft_par *par)
 
 	/* Power supply setting */
 	write_reg(par, 0x0019, 0x0000);	/* DC/DC output setting */
-	udelay(200);
+	usleep_range(200, 210);
 	write_reg(par, 0x001A, 0x1000);	/* DC/DC frequency setting */
 	write_reg(par, 0x001B, 0x0023);	/* DC/DC rising setting */
 	write_reg(par, 0x001C, 0x0C01);	/* Regulator voltage setting */
-- 
2.20.1