On 25/06/2019 17:34, Bartosz Golaszewski wrote:
From: Bartosz Golaszewski <bgolaszew...@baylibre.com>
Currently we can only probe devices that either use device tree or pass
platform data to probe(). Rename gpio_backlight_probe_dt() to
gpio_backlight_probe_prop() and use generic device properties instead
of OF specific helpers.
This has already been done in (which IIRC did get queued for the next
release):
https://www.spinics.net/lists/dri-devel/msg215050.html
Reverse the logic checking the presence of
platform data in probe(). This way we can probe devices() registered
from machine code that neither have a DT node nor use platform data.
Andy's patch did not reverse this logic... but it does check
pdev->dev.fwnode rather than of_node .
Daniel.
Signed-off-by: Bartosz Golaszewski <bgolaszew...@baylibre.com>
---
drivers/video/backlight/gpio_backlight.c | 24 ++++++++----------------
1 file changed, 8 insertions(+), 16 deletions(-)
diff --git a/drivers/video/backlight/gpio_backlight.c
b/drivers/video/backlight/gpio_backlight.c
index b9300f3e1ee6..654c19d3a81d 100644
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -54,15 +54,14 @@ static const struct backlight_ops gpio_backlight_ops = {
.check_fb = gpio_backlight_check_fb,
};
-static int gpio_backlight_probe_dt(struct platform_device *pdev,
- struct gpio_backlight *gbl)
+static int gpio_backlight_probe_prop(struct platform_device *pdev,
+ struct gpio_backlight *gbl)
{
struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
enum gpiod_flags flags;
int ret;
- gbl->def_value = of_property_read_bool(np, "default-on");
+ gbl->def_value = device_property_read_bool(dev, "default-on");
flags = gbl->def_value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
gbl->gpiod = devm_gpiod_get(dev, NULL, flags);
@@ -86,26 +85,15 @@ static int gpio_backlight_probe(struct platform_device
*pdev)
struct backlight_properties props;
struct backlight_device *bl;
struct gpio_backlight *gbl;
- struct device_node *np = pdev->dev.of_node;
int ret;
- if (!pdata && !np) {
- dev_err(&pdev->dev,
- "failed to find platform data or device tree node.\n");
- return -ENODEV;
- }
-
gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL);
if (gbl == NULL)
return -ENOMEM;
gbl->dev = &pdev->dev;
- if (np) {
- ret = gpio_backlight_probe_dt(pdev, gbl);
- if (ret)
- return ret;
- } else {
+ if (pdata) {
/*
* Legacy platform data GPIO retrieveal. Do not expand
* the use of this code path, currently only used by one
@@ -126,6 +114,10 @@ static int gpio_backlight_probe(struct platform_device
*pdev)
gbl->gpiod = gpio_to_desc(pdata->gpio);
if (!gbl->gpiod)
return -EINVAL;
+ } else {
+ ret = gpio_backlight_probe_prop(pdev, gbl);
+ if (ret)
+ return ret;
}
memset(&props, 0, sizeof(props));
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