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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 <michal.vokac@ysoft.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
This commit is contained in:
Michal Vokáč 2018-10-08 12:57:37 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 7d1b8d7a85
commit 9827f26374
1 changed files with 2 additions and 2 deletions
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4
drivers/video/fbdev/ssd1307fb.c
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@ -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) {