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Subject[PATCH v2 2/7] backlight: gpio: simplify the platform data handling
Date
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Now that the last user of platform data (sh ecovec24) defines a proper
GPIO lookup and sets the 'default-on' device property, we can drop the
platform_data-specific GPIO handling and unify a big chunk of code.

The only field used from the platform data is now the fbdev pointer.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/video/backlight/gpio_backlight.c | 64 +++++-------------------
1 file changed, 13 insertions(+), 51 deletions(-)

diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
index e84f3087e29f..01262186fa1e 100644
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -55,30 +55,6 @@ 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)
-{
- struct device *dev = &pdev->dev;
- enum gpiod_flags flags;
- int ret;
-
- 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);
- if (IS_ERR(gbl->gpiod)) {
- ret = PTR_ERR(gbl->gpiod);
-
- if (ret != -EPROBE_DEFER) {
- dev_err(dev,
- "Error: The gpios parameter is missing or invalid.\n");
- }
- return ret;
- }
-
- return 0;
-}
-
static int gpio_backlight_probe(struct platform_device *pdev)
{
struct gpio_backlight_platform_data *pdata =
@@ -86,6 +62,7 @@ static int gpio_backlight_probe(struct platform_device *pdev)
struct backlight_properties props;
struct backlight_device *bl;
struct gpio_backlight *gbl;
+ enum gpiod_flags flags;
int ret;

gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL);
@@ -94,35 +71,20 @@ static int gpio_backlight_probe(struct platform_device *pdev)

gbl->dev = &pdev->dev;

- if (pdev->dev.fwnode) {
- 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
- * SH board.
- */
- unsigned long flags = GPIOF_DIR_OUT;
-
+ if (pdata)
gbl->fbdev = pdata->fbdev;
- gbl->def_value = pdata->def_value;
- flags |= gbl->def_value ? GPIOF_INIT_HIGH : GPIOF_INIT_LOW;
-
- ret = devm_gpio_request_one(gbl->dev, pdata->gpio, flags,
- pdata ? pdata->name : "backlight");
- if (ret < 0) {
- dev_err(&pdev->dev, "unable to request GPIO\n");
- return ret;
+
+ gbl->def_value = device_property_read_bool(&pdev->dev, "default-on");
+ flags = gbl->def_value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
+
+ gbl->gpiod = devm_gpiod_get(&pdev->dev, NULL, flags);
+ if (IS_ERR(gbl->gpiod)) {
+ ret = PTR_ERR(gbl->gpiod);
+ if (ret != -EPROBE_DEFER) {
+ dev_err(&pdev->dev,
+ "Error: The gpios parameter is missing or invalid.\n");
}
- gbl->gpiod = gpio_to_desc(pdata->gpio);
- if (!gbl->gpiod)
- return -EINVAL;
- } else {
- dev_err(&pdev->dev,
- "failed to find platform data or device tree node.\n");
- return -ENODEV;
+ return ret;
}

memset(&props, 0, sizeof(props));
--
2.21.0
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