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u-boot/include/backlight.h

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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>
2018-05-06 21:58:06 +00:00
/* SPDX-License-Identifier: GPL-2.0+ */
dm: backlight: Add a backlight uclass LCD panels normally have a backlight which can be controlled to illuminate the LCD contents. Add a uclass to support this. Initially it only has a method to enable the backlight. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22 02:44:56 +00:00
/*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef _BACKLIGHT_H
#define _BACKLIGHT_H
common: Drop asm/global_data.h from common header Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include <asm/global_data.h> at all, so remove that include. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
2020-10-31 03:38:53 +00:00
struct udevice;
panel: Expand the backlight support At present the panel can be turned on but not off, and the brightness cannot be controlled at run-time. Add a new API function to both the panel and backlight uclasses to handle this. Enhance the PWM backlight driver to deal with custom levels properly and allow the backlight to be turned on and off. Update the test to cover thes new features. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-01 18:22:41 +00:00
enum {
BACKLIGHT_MAX = 100,
BACKLIGHT_MIN = 0,
BACKLIGHT_OFF = -1,
BACKLIGHT_DEFAULT = -2,
};
dm: backlight: Add a backlight uclass LCD panels normally have a backlight which can be controlled to illuminate the LCD contents. Add a uclass to support this. Initially it only has a method to enable the backlight. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22 02:44:56 +00:00
struct backlight_ops {
/**
* enable() - Enable a backlight
*
* @dev: Backlight device to enable
* @return 0 if OK, -ve on error
*/
int (*enable)(struct udevice *dev);
panel: Expand the backlight support At present the panel can be turned on but not off, and the brightness cannot be controlled at run-time. Add a new API function to both the panel and backlight uclasses to handle this. Enhance the PWM backlight driver to deal with custom levels properly and allow the backlight to be turned on and off. Update the test to cover thes new features. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-01 18:22:41 +00:00
/**
* set_brightness - Set brightness
*
* @dev: Backlight device to update
* @percent: Brightness value (0 to 100, or BACKLIGHT_... value)
* @return 0 if OK, -ve on error
*/
int (*set_brightness)(struct udevice *dev, int percent);
dm: backlight: Add a backlight uclass LCD panels normally have a backlight which can be controlled to illuminate the LCD contents. Add a uclass to support this. Initially it only has a method to enable the backlight. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22 02:44:56 +00:00
};
#define backlight_get_ops(dev) ((struct backlight_ops *)(dev)->driver->ops)
/**
* backlight_enable() - Enable a backlight
*
* @dev: Backlight device to enable
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if OK, -ve on error
dm: backlight: Add a backlight uclass LCD panels normally have a backlight which can be controlled to illuminate the LCD contents. Add a uclass to support this. Initially it only has a method to enable the backlight. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22 02:44:56 +00:00
*/
int backlight_enable(struct udevice *dev);
panel: Expand the backlight support At present the panel can be turned on but not off, and the brightness cannot be controlled at run-time. Add a new API function to both the panel and backlight uclasses to handle this. Enhance the PWM backlight driver to deal with custom levels properly and allow the backlight to be turned on and off. Update the test to cover thes new features. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-01 18:22:41 +00:00
/**
* backlight_set_brightness - Set brightness
*
* @dev: Backlight device to update
* @percent: Brightness value (0 to 100, or BACKLIGHT_... value)
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if OK, -ve on error
panel: Expand the backlight support At present the panel can be turned on but not off, and the brightness cannot be controlled at run-time. Add a new API function to both the panel and backlight uclasses to handle this. Enhance the PWM backlight driver to deal with custom levels properly and allow the backlight to be turned on and off. Update the test to cover thes new features. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-01 18:22:41 +00:00
*/
int backlight_set_brightness(struct udevice *dev, int percent);
dm: backlight: Add a backlight uclass LCD panels normally have a backlight which can be controlled to illuminate the LCD contents. Add a uclass to support this. Initially it only has a method to enable the backlight. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22 02:44:56 +00:00
#endif
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