mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-30 21:46:31 +00:00
42bd6f59ae
This patch adds helper functions for registering/unregistering LED Flash class devices as V4L2 sub-devices. The functions should be called from the LED subsystem device driver. In case the support for V4L2 Flash sub-devices is disabled in the kernel config the functions' empty versions will be used. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Sakari Ailus <sakari.ailus@iki.fi> Cc: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
149 lines
4.6 KiB
C
149 lines
4.6 KiB
C
/*
|
|
* V4L2 flash LED sub-device registration helpers.
|
|
*
|
|
* Copyright (C) 2015 Samsung Electronics Co., Ltd
|
|
* Author: Jacek Anaszewski <j.anaszewski@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#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 {
|
|
/* setup strobing the flash by hardware pin state assertion */
|
|
int (*external_strobe_set)(struct v4l2_flash *v4l2_flash,
|
|
bool enable);
|
|
/* convert intensity to brightness in a device specific manner */
|
|
enum led_brightness (*intensity_to_led_brightness)
|
|
(struct v4l2_flash *v4l2_flash, s32 intensity);
|
|
/* convert brightness to intensity in a device specific manner */
|
|
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
|
|
* @torch_intensity: constraints for the LED in torch mode
|
|
* @indicator_intensity: constraints for the indicator 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 torch_intensity;
|
|
struct led_flash_setting indicator_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_flash *iled_cdev;
|
|
const struct v4l2_flash_ops *ops;
|
|
|
|
struct v4l2_subdev sd;
|
|
struct v4l2_ctrl_handler hdl;
|
|
struct v4l2_ctrl **ctrls;
|
|
};
|
|
|
|
static inline struct v4l2_flash *v4l2_subdev_to_v4l2_flash(
|
|
struct v4l2_subdev *sd)
|
|
{
|
|
return container_of(sd, struct v4l2_flash, sd);
|
|
}
|
|
|
|
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
|
|
* @of_node: of_node of the LED, may be NULL if the same as device's
|
|
* @fled_cdev: LED flash class device to wrap
|
|
* @iled_cdev: LED flash class device representing indicator LED associated
|
|
* with fled_cdev, may be NULL
|
|
* @flash_ops: V4L2 Flash device ops
|
|
* @config: initialization data for V4L2 Flash sub-device
|
|
*
|
|
* Create V4L2 Flash sub-device wrapping given LED subsystem device.
|
|
*
|
|
* 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 device_node *of_node,
|
|
struct led_classdev_flash *fled_cdev,
|
|
struct led_classdev_flash *iled_cdev,
|
|
const struct v4l2_flash_ops *ops,
|
|
struct v4l2_flash_config *config);
|
|
|
|
/**
|
|
* v4l2_flash_release - release V4L2 Flash sub-device
|
|
* @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 device_node *of_node,
|
|
struct led_classdev_flash *fled_cdev,
|
|
struct led_classdev_flash *iled_cdev,
|
|
const struct v4l2_flash_ops *ops,
|
|
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 */
|