static int panel_dpi_probe_of(struct platform_device *pdev)
{
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct device_node *node = pdev->dev.of_node;
struct omap_dss_device *in;
int r;
struct display_timing timing;
struct videomode vm;
struct gpio_desc *gpio;
gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
ddata->enable_gpio = gpio;
/*
* Many different panels are supported by this driver and there are
* probably very different needs for their reset pins in regards to
* timing and order relative to the enable gpio. So for now it's just
* ensured that the reset line isn't active.
*/
gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc");
if (IS_ERR(ddata->vcc_supply))
return PTR_ERR(ddata->vcc_supply);
ddata->backlight_gpio = -ENOENT;
r = of_get_display_timing(node, "panel-timing", &timing);
if (r) {
dev_err(&pdev->dev, "failed to get video timing\n");
return r;
}
videomode_from_timing(&timing, &vm);
videomode_to_omap_video_timings(&vm, &ddata->videomode);
in = omapdss_of_find_source_for_first_ep(node);
if (IS_ERR(in)) {
dev_err(&pdev->dev, "failed to find video source\n");
return PTR_ERR(in);
}
ddata->in = in;
return 0;
}
static int panel_dpi_probe_of(struct platform_device *pdev)
{
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct device_node *node = pdev->dev.of_node;
struct omap_dss_device *in;
int r;
struct display_timing timing;
struct videomode vm;
struct gpio_desc *gpio;
gpio = devm_gpiod_get(&pdev->dev, "enable");
if (IS_ERR(gpio)) {
if (PTR_ERR(gpio) != -ENOENT)
return PTR_ERR(gpio);
else
gpio = NULL;
} else {
gpiod_direction_output(gpio, 0);
}
ddata->enable_gpio = gpio;
ddata->backlight_gpio = -ENOENT;
r = of_get_display_timing(node, "panel-timing", &timing);
if (r) {
dev_err(&pdev->dev, "failed to get video timing\n");
return r;
}
videomode_from_timing(&timing, &vm);
videomode_to_omap_video_timings(&vm, &ddata->videomode);
in = omapdss_of_find_source_for_first_ep(node);
if (IS_ERR(in)) {
dev_err(&pdev->dev, "failed to find video source\n");
return PTR_ERR(in);
}
ddata->in = in;
return 0;
}
static int panel_dpi_probe_pdata(struct platform_device *pdev)
{
const struct panel_dpi_platform_data *pdata;
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct omap_dss_device *dssdev, *in;
struct videomode vm;
int r;
pdata = dev_get_platdata(&pdev->dev);
in = omap_dss_find_output(pdata->source);
if (in == NULL) {
dev_err(&pdev->dev, "failed to find video source '%s'\n",
pdata->source);
return -EPROBE_DEFER;
}
ddata->in = in;
ddata->data_lines = pdata->data_lines;
videomode_from_timing(pdata->display_timing, &vm);
videomode_to_omap_video_timings(&vm, &ddata->videomode);
dssdev = &ddata->dssdev;
dssdev->name = pdata->name;
r = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
GPIOF_OUT_INIT_LOW, "panel enable");
if (r)
goto err_gpio;
ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio);
ddata->backlight_gpio = pdata->backlight_gpio;
return 0;
err_gpio:
omap_dss_put_device(ddata->in);
return r;
}