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linux-headers-5.15.0-181
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media
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/usr/src/linux-headers-5.15.0-181/include/media
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/usr/src/linux-headers-5.15.0-181/include/media/v4l2-flash-led-class.h
(5888B)
/* SPDX-License-Identifier: GPL-2.0-only */ /* * V4L2 flash LED sub-device registration helpers. * * Copyright (C) 2015 Samsung Electronics Co., Ltd * Author: Jacek Anaszewski <j.anaszewski@samsung.com> */ #ifndef _V4L2_FLASH_H #define _V4L2_FLASH_H #include <media/v4l2-ctrls.h> #include <media/v4l2-subdev.h> struct led_classdev_flash; struct led_classdev; struct v4l2_flash; enum led_brightness; /** * struct v4l2_flash_ctrl_data - flash control initialization data, filled * basing on the features declared by the LED flash * class driver in the v4l2_flash_config * @config: initialization data for a control * @cid: contains v4l2 flash control id if the config * field was initialized, 0 otherwise */ struct v4l2_flash_ctrl_data { struct v4l2_ctrl_config config; u32 cid; }; /** * struct v4l2_flash_ops - V4L2 flash operations * * @external_strobe_set: Setup strobing the flash by hardware pin state * assertion. * @intensity_to_led_brightness: Convert intensity to brightness in a device * specific manner * @led_brightness_to_intensity: convert brightness to intensity in a device * specific manner. */ struct v4l2_flash_ops { int (*external_strobe_set)(struct v4l2_flash *v4l2_flash, bool enable); enum led_brightness (*intensity_to_led_brightness) (struct v4l2_flash *v4l2_flash, s32 intensity); s32 (*led_brightness_to_intensity) (struct v4l2_flash *v4l2_flash, enum led_brightness); }; /** * struct v4l2_flash_config - V4L2 Flash sub-device initialization data * @dev_name: the name of the media entity, * unique in the system * @intensity: non-flash strobe constraints for the LED * @flash_faults: bitmask of flash faults that the LED flash class * device can report; corresponding LED_FAULT* bit * definitions are available in the header file * <linux/led-class-flash.h> * @has_external_strobe: external strobe capability */ struct v4l2_flash_config { char dev_name[32]; struct led_flash_setting intensity; u32 flash_faults; unsigned int has_external_strobe:1; }; /** * struct v4l2_flash - Flash sub-device context * @fled_cdev: LED flash class device controlled by this sub-device * @iled_cdev: LED class device representing indicator LED associated * with the LED flash class device * @ops: V4L2 specific flash ops * @sd: V4L2 sub-device * @hdl: flash controls handler * @ctrls: array of pointers to controls, whose values define * the sub-device state */ struct v4l2_flash { struct led_classdev_flash *fled_cdev; struct led_classdev *iled_cdev; const struct v4l2_flash_ops *ops; struct v4l2_subdev sd; struct v4l2_ctrl_handler hdl; struct v4l2_ctrl **ctrls; }; /** * v4l2_subdev_to_v4l2_flash - Returns a &struct v4l2_flash from the * &struct v4l2_subdev embedded on it. * * @sd: pointer to &struct v4l2_subdev */ static inline struct v4l2_flash *v4l2_subdev_to_v4l2_flash( struct v4l2_subdev *sd) { return container_of(sd, struct v4l2_flash, sd); } /** * v4l2_ctrl_to_v4l2_flash - Returns a &struct v4l2_flash from the * &struct v4l2_ctrl embedded on it. * * @c: pointer to &struct v4l2_ctrl */ static inline struct v4l2_flash *v4l2_ctrl_to_v4l2_flash(struct v4l2_ctrl *c) { return container_of(c->handler, struct v4l2_flash, hdl); } #if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) /** * v4l2_flash_init - initialize V4L2 flash led sub-device * @dev: flash device, e.g. an I2C device * @fwn: fwnode_handle of the LED, may be NULL if the same as device's * @fled_cdev: LED flash class device to wrap * @ops: V4L2 Flash device ops * @config: initialization data for V4L2 Flash sub-device * * Create V4L2 Flash sub-device wrapping given LED subsystem device. * The ops pointer is stored by the V4L2 flash framework. No * references are held to config nor its contents once this function * has returned. * * Returns: A valid pointer, or, when an error occurs, the return * value is encoded using ERR_PTR(). Use IS_ERR() to check and * PTR_ERR() to obtain the numeric return value. */ struct v4l2_flash *v4l2_flash_init( struct device *dev, struct fwnode_handle *fwn, struct led_classdev_flash *fled_cdev, const struct v4l2_flash_ops *ops, struct v4l2_flash_config *config); /** * v4l2_flash_indicator_init - initialize V4L2 indicator sub-device * @dev: flash device, e.g. an I2C device * @fwn: fwnode_handle of the LED, may be NULL if the same as device's * @iled_cdev: LED flash class device representing the indicator LED * @config: initialization data for V4L2 Flash sub-device * * Create V4L2 Flash sub-device wrapping given LED subsystem device. * The ops pointer is stored by the V4L2 flash framework. No * references are held to config nor its contents once this function * has returned. * * Returns: A valid pointer, or, when an error occurs, the return * value is encoded using ERR_PTR(). Use IS_ERR() to check and * PTR_ERR() to obtain the numeric return value. */ struct v4l2_flash *v4l2_flash_indicator_init( struct device *dev, struct fwnode_handle *fwn, struct led_classdev *iled_cdev, struct v4l2_flash_config *config); /** * v4l2_flash_release - release V4L2 Flash sub-device * @v4l2_flash: the V4L2 Flash sub-device to release * * Release V4L2 Flash sub-device. */ void v4l2_flash_release(struct v4l2_flash *v4l2_flash); #else static inline struct v4l2_flash *v4l2_flash_init( struct device *dev, struct fwnode_handle *fwn, struct led_classdev_flash *fled_cdev, const struct v4l2_flash_ops *ops, struct v4l2_flash_config *config) { return NULL; } static inline struct v4l2_flash *v4l2_flash_indicator_init( struct device *dev, struct fwnode_handle *fwn, struct led_classdev *iled_cdev, struct v4l2_flash_config *config) { return NULL; } static inline void v4l2_flash_release(struct v4l2_flash *v4l2_flash) { } #endif /* CONFIG_V4L2_FLASH_LED_CLASS */ #endif /* _V4L2_FLASH_H */
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