u-boot/drivers/video/backlight_gpio.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

71 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
* Author: Patrick Delaunay <patrick.delaunay@st.com>
*/
#include <common.h>
#include <dm.h>
#include <backlight.h>
#include <asm/gpio.h>
struct gpio_backlight_priv {
struct gpio_desc gpio;
bool def_value;
};
static int gpio_backlight_enable(struct udevice *dev)
{
struct gpio_backlight_priv *priv = dev_get_priv(dev);
dm_gpio_set_value(&priv->gpio, 1);
return 0;
}
static int gpio_backlight_ofdata_to_platdata(struct udevice *dev)
{
struct gpio_backlight_priv *priv = dev_get_priv(dev);
int ret;
ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio,
GPIOD_IS_OUT);
if (ret) {
debug("%s: Warning: cannot get GPIO: ret=%d\n",
__func__, ret);
return ret;
}
priv->def_value = dev_read_bool(dev, "default-on");
return 0;
}
static int gpio_backlight_probe(struct udevice *dev)
{
struct gpio_backlight_priv *priv = dev_get_priv(dev);
if (priv->def_value)
gpio_backlight_enable(dev);
return 0;
}
static const struct backlight_ops gpio_backlight_ops = {
.enable = gpio_backlight_enable,
};
static const struct udevice_id gpio_backlight_ids[] = {
{ .compatible = "gpio-backlight" },
{ }
};
U_BOOT_DRIVER(gpio_backlight) = {
.name = "gpio_backlight",
.id = UCLASS_PANEL_BACKLIGHT,
.of_match = gpio_backlight_ids,
.ops = &gpio_backlight_ops,
.ofdata_to_platdata = gpio_backlight_ofdata_to_platdata,
.probe = gpio_backlight_probe,
.priv_auto_alloc_size = sizeof(struct gpio_backlight_priv),
};