video: ssd1307fb: Do not hard code active-low reset sequence

The SSD130x OLED display reset signal is active low. Now the reset sequence is implemented in such a way that users are forced to define reset-gpios as GPIO_ACTIVE_HIGH in DT to make the reset work. Do not hard code the active-low sequence into the driver but instead allow the user to specify the gpio as GPIO_ACTIVE_LOW to reflect the real world. Signed-off-by: Michal Vokáč <[email protected]> Cc: Shawn Guo <[email protected]> Cc: Rob Herring <[email protected]> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
vieko · Oct 8, 2018 · 9827f26 · 9827f26
1 parent 7d1b8d7
commit 9827f26
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
@@ -667,10 +667,10 @@ static int ssd1307fb_probe(struct i2c_client *client,
 
 	if (par->reset) {
 		/* Reset the screen */
-		gpiod_set_value_cansleep(par->reset, 0);
-		udelay(4);
 		gpiod_set_value_cansleep(par->reset, 1);
 		udelay(4);
+		gpiod_set_value_cansleep(par->reset, 0);
+		udelay(4);
 	}
 
 	if (par->vbat_reg) {