diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-08-18 07:27:34 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-08-18 08:57:59 +0200 |
| commit | 47c66a2a28c5fc785f332cf7384c6303dd49dd54 (patch) | |
| tree | 3ab312b1d956363728d827561ad3fc60cad0c185 /drivers/video/ssd1307fb.c | |
| parent | a662c814ce1f262e846e2ec5e60e6631b4bb3c2e (diff) | |
| download | barebox-47c66a2a28c5fc785f332cf7384c6303dd49dd54.tar.gz barebox-47c66a2a28c5fc785f332cf7384c6303dd49dd54.tar.xz | |
video: ssd1307fb: Honour reset GPIO polarity
The reset GPIO polarity was hardcoded as active low. Honour the polarity
flags given in the device tree instead.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/video/ssd1307fb.c')
| -rw-r--r-- | drivers/video/ssd1307fb.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/video/ssd1307fb.c b/drivers/video/ssd1307fb.c index 45f479b0ef..0709399358 100644 --- a/drivers/video/ssd1307fb.c +++ b/drivers/video/ssd1307fb.c @@ -396,6 +396,7 @@ static int ssd1307fb_probe(struct device_d *dev) struct ssd1307fb_par *par; struct ssd1307fb_array *array; u8 *vmem = NULL; + enum of_gpio_flags of_flags; int ret; int i, j; @@ -413,8 +414,8 @@ static int ssd1307fb_probe(struct device_d *dev) par->device_info = (struct ssd1307fb_deviceinfo *)match->data; - par->reset = of_get_named_gpio(node, - "reset-gpios", 0); + par->reset = of_get_named_gpio_flags(node, + "reset-gpios", 0, &of_flags); if (!gpio_is_valid(par->reset) && par->reset == -EPROBE_DEFER) { ret = -EPROBE_DEFER; goto fb_alloc_error; @@ -500,9 +501,12 @@ static int ssd1307fb_probe(struct device_d *dev) info->screen_base = (u8 __force __iomem *)vmem; if (par->reset >= 0) { - ret = gpio_request_one(par->reset, - GPIOF_OUT_INIT_HIGH, - "oled-reset"); + unsigned long flags = GPIOF_OUT_INIT_ACTIVE; + + if (of_flags & OF_GPIO_ACTIVE_LOW) + flags |= GPIOF_ACTIVE_LOW; + + ret = gpio_request_one(par->reset, flags, "oled-reset"); if (ret) { dev_err(&client->dev, "failed to request gpio %d: %d\n", @@ -519,7 +523,7 @@ static int ssd1307fb_probe(struct device_d *dev) if (par->reset > 0) { /* Reset the screen */ - gpio_set_value(par->reset, 0); + gpio_set_active(par->reset, 1); udelay(4); } @@ -531,7 +535,7 @@ static int ssd1307fb_probe(struct device_d *dev) mdelay(100); if (par->reset > 0) { - gpio_set_value(par->reset, 1); + gpio_set_active(par->reset, 0); udelay(4); } |