forked from Minki/linux
ba6fa84651
lp55xx_unregister_sysfs() is used for removing lp55xx device attributes. Chip specific and engine attributes are removed on unloading the driver. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/*
|
|
* LP55XX Common Driver Header
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments
|
|
*
|
|
* Author: Milo(Woogyom) Kim <milo.kim@ti.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.
|
|
*
|
|
* Derived from leds-lp5521.c, leds-lp5523.c
|
|
*/
|
|
|
|
#ifndef _LEDS_LP55XX_COMMON_H
|
|
#define _LEDS_LP55XX_COMMON_H
|
|
|
|
enum lp55xx_engine_index {
|
|
LP55XX_ENGINE_INVALID,
|
|
LP55XX_ENGINE_1,
|
|
LP55XX_ENGINE_2,
|
|
LP55XX_ENGINE_3,
|
|
};
|
|
|
|
struct lp55xx_led;
|
|
struct lp55xx_chip;
|
|
|
|
/*
|
|
* struct lp55xx_reg
|
|
* @addr : Register address
|
|
* @val : Register value
|
|
*/
|
|
struct lp55xx_reg {
|
|
u8 addr;
|
|
u8 val;
|
|
};
|
|
|
|
/*
|
|
* struct lp55xx_device_config
|
|
* @reset : Chip specific reset command
|
|
* @enable : Chip specific enable command
|
|
* @max_channel : Maximum number of channels
|
|
* @post_init_device : Chip specific initialization code
|
|
* @brightness_work_fn : Brightness work function
|
|
* @set_led_current : LED current set function
|
|
* @firmware_cb : Call function when the firmware is loaded
|
|
* @run_engine : Run internal engine for pattern
|
|
* @dev_attr_group : Device specific attributes
|
|
*/
|
|
struct lp55xx_device_config {
|
|
const struct lp55xx_reg reset;
|
|
const struct lp55xx_reg enable;
|
|
const int max_channel;
|
|
|
|
/* define if the device has specific initialization process */
|
|
int (*post_init_device) (struct lp55xx_chip *chip);
|
|
|
|
/* access brightness register */
|
|
void (*brightness_work_fn)(struct work_struct *work);
|
|
|
|
/* current setting function */
|
|
void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
|
|
|
|
/* access program memory when the firmware is loaded */
|
|
void (*firmware_cb)(struct lp55xx_chip *chip);
|
|
|
|
/* used for running firmware LED patterns */
|
|
void (*run_engine) (struct lp55xx_chip *chip, bool start);
|
|
|
|
/* additional device specific attributes */
|
|
const struct attribute_group *dev_attr_group;
|
|
};
|
|
|
|
/*
|
|
* struct lp55xx_chip
|
|
* @cl : I2C communication for access registers
|
|
* @pdata : Platform specific data
|
|
* @lock : Lock for user-space interface
|
|
* @num_leds : Number of registered LEDs
|
|
* @cfg : Device specific configuration data
|
|
* @engine_idx : Selected engine number
|
|
* @fw : Firmware data for running a LED pattern
|
|
*/
|
|
struct lp55xx_chip {
|
|
struct i2c_client *cl;
|
|
struct lp55xx_platform_data *pdata;
|
|
struct mutex lock; /* lock for user-space interface */
|
|
int num_leds;
|
|
struct lp55xx_device_config *cfg;
|
|
enum lp55xx_engine_index engine_idx;
|
|
const struct firmware *fw;
|
|
};
|
|
|
|
/*
|
|
* struct lp55xx_led
|
|
* @chan_nr : Channel number
|
|
* @cdev : LED class device
|
|
* @led_current : Current setting at each led channel
|
|
* @max_current : Maximun current at each led channel
|
|
* @brightness_work : Workqueue for brightness control
|
|
* @brightness : Brightness value
|
|
* @chip : The lp55xx chip data
|
|
*/
|
|
struct lp55xx_led {
|
|
int chan_nr;
|
|
struct led_classdev cdev;
|
|
u8 led_current;
|
|
u8 max_current;
|
|
struct work_struct brightness_work;
|
|
u8 brightness;
|
|
struct lp55xx_chip *chip;
|
|
};
|
|
|
|
/* register access */
|
|
extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
|
|
extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
|
|
extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
|
|
u8 mask, u8 val);
|
|
|
|
/* common device init/deinit functions */
|
|
extern int lp55xx_init_device(struct lp55xx_chip *chip);
|
|
extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
|
|
|
|
/* common LED class device functions */
|
|
extern int lp55xx_register_leds(struct lp55xx_led *led,
|
|
struct lp55xx_chip *chip);
|
|
extern void lp55xx_unregister_leds(struct lp55xx_led *led,
|
|
struct lp55xx_chip *chip);
|
|
|
|
/* common device attributes functions */
|
|
extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
|
|
extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
|
|
|
|
#endif /* _LEDS_LP55XX_COMMON_H */
|