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 коммит произвёл Bartlomiej Zolnierkiewicz
Родитель 7d1b8d7a85
Коммит 9827f26374
1 изменённых файлов: 2 добавлений и 2 удалений

Просмотреть файл

@ -667,10 +667,10 @@ static int ssd1307fb_probe(struct i2c_client *client,
if (par->reset) { if (par->reset) {
/* Reset the screen */ /* Reset the screen */
gpiod_set_value_cansleep(par->reset, 0);
udelay(4);
gpiod_set_value_cansleep(par->reset, 1); gpiod_set_value_cansleep(par->reset, 1);
udelay(4); udelay(4);
gpiod_set_value_cansleep(par->reset, 0);
udelay(4);
} }
if (par->vbat_reg) { if (par->vbat_reg) {