From: Michal Vokáč <michal.vokac@ysoft.com>
Date: Mon, 8 Oct 2018 10:57:36 +0000 (+0200)
Subject: video: ssd1307fb: Use gpiod_set_value_cansleep() for reset
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7d1b8d7a858024bd6a1dca206646fbcab5785220;p=linux.git

video: ssd1307fb: Use gpiod_set_value_cansleep() for reset

The reset signal can be produced by GPIO expander that can sleep.
In that case the probe function fails. Allow using GPIO expanders for
the reset signal by using the non-atomic gpiod_set_value_cansleep()
function.

Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 6439231f2db22..4061a20cfe24a 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -667,9 +667,9 @@ static int ssd1307fb_probe(struct i2c_client *client,
 
 	if (par->reset) {
 		/* Reset the screen */
-		gpiod_set_value(par->reset, 0);
+		gpiod_set_value_cansleep(par->reset, 0);
 		udelay(4);
-		gpiod_set_value(par->reset, 1);
+		gpiod_set_value_cansleep(par->reset, 1);
 		udelay(4);
 	}