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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Copyright (c) 2016 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #ifndef _BACKLIGHT_H
- #define _BACKLIGHT_H
- enum {
- BACKLIGHT_MAX = 100,
- BACKLIGHT_MIN = 0,
- BACKLIGHT_OFF = -1,
- BACKLIGHT_DEFAULT = -2,
- };
- struct backlight_ops {
- /**
- * enable() - Enable a backlight
- *
- * @dev: Backlight device to enable
- * @return 0 if OK, -ve on error
- */
- int (*enable)(struct udevice *dev);
- /**
- * 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);
- };
- #define backlight_get_ops(dev) ((struct backlight_ops *)(dev)->driver->ops)
- /**
- * backlight_enable() - Enable a backlight
- *
- * @dev: Backlight device to enable
- * @return 0 if OK, -ve on error
- */
- int backlight_enable(struct udevice *dev);
- /**
- * backlight_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 backlight_set_brightness(struct udevice *dev, int percent);
- #endif
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