1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * LP55XX Common Driver Header
5 * Copyright (C) 2012 Texas Instruments
7 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
9 * Derived from leds-lp5521.c, leds-lp5523.c
12 #ifndef _LEDS_LP55XX_COMMON_H
13 #define _LEDS_LP55XX_COMMON_H
15 #include <linux/led-class-multicolor.h>
17 enum lp55xx_engine_index {
18 LP55XX_ENGINE_INVALID,
22 LP55XX_ENGINE_MAX = LP55XX_ENGINE_3,
25 enum lp55xx_engine_mode {
26 LP55XX_ENGINE_DISABLED,
31 #define LP55XX_DEV_ATTR_RW(name, show, store) \
32 DEVICE_ATTR(name, S_IRUGO | S_IWUSR, show, store)
33 #define LP55XX_DEV_ATTR_RO(name, show) \
34 DEVICE_ATTR(name, S_IRUGO, show, NULL)
35 #define LP55XX_DEV_ATTR_WO(name, store) \
36 DEVICE_ATTR(name, S_IWUSR, NULL, store)
38 #define show_mode(nr) \
39 static ssize_t show_engine##nr##_mode(struct device *dev, \
40 struct device_attribute *attr, \
43 return show_engine_mode(dev, attr, buf, nr); \
46 #define store_mode(nr) \
47 static ssize_t store_engine##nr##_mode(struct device *dev, \
48 struct device_attribute *attr, \
49 const char *buf, size_t len) \
51 return store_engine_mode(dev, attr, buf, len, nr); \
54 #define show_leds(nr) \
55 static ssize_t show_engine##nr##_leds(struct device *dev, \
56 struct device_attribute *attr, \
59 return show_engine_leds(dev, attr, buf, nr); \
62 #define store_leds(nr) \
63 static ssize_t store_engine##nr##_leds(struct device *dev, \
64 struct device_attribute *attr, \
65 const char *buf, size_t len) \
67 return store_engine_leds(dev, attr, buf, len, nr); \
70 #define store_load(nr) \
71 static ssize_t store_engine##nr##_load(struct device *dev, \
72 struct device_attribute *attr, \
73 const char *buf, size_t len) \
75 return store_engine_load(dev, attr, buf, len, nr); \
83 * @addr : Register address
84 * @val : Register value
92 * struct lp55xx_device_config
93 * @reset : Chip specific reset command
94 * @enable : Chip specific enable command
95 * @max_channel : Maximum number of channels
96 * @post_init_device : Chip specific initialization code
97 * @brightness_fn : Brightness function
98 * @multicolor_brightness_fn : Multicolor brightness function
99 * @set_led_current : LED current set function
100 * @firmware_cb : Call function when the firmware is loaded
101 * @run_engine : Run internal engine for pattern
102 * @dev_attr_group : Device specific attributes
104 struct lp55xx_device_config {
105 const struct lp55xx_reg reset;
106 const struct lp55xx_reg enable;
107 const int max_channel;
109 /* define if the device has specific initialization process */
110 int (*post_init_device) (struct lp55xx_chip *chip);
112 /* set LED brightness */
113 int (*brightness_fn)(struct lp55xx_led *led);
115 /* set multicolor LED brightness */
116 int (*multicolor_brightness_fn)(struct lp55xx_led *led);
118 /* current setting function */
119 void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
121 /* access program memory when the firmware is loaded */
122 void (*firmware_cb)(struct lp55xx_chip *chip);
124 /* used for running firmware LED patterns */
125 void (*run_engine) (struct lp55xx_chip *chip, bool start);
127 /* additional device specific attributes */
128 const struct attribute_group *dev_attr_group;
132 * struct lp55xx_engine
133 * @mode : Engine mode
134 * @led_mux : Mux bits for LED selection. Only used in LP5523
136 struct lp55xx_engine {
137 enum lp55xx_engine_mode mode;
143 * @cl : I2C communication for access registers
144 * @pdata : Platform specific data
145 * @lock : Lock for user-space interface
146 * @num_leds : Number of registered LEDs
147 * @cfg : Device specific configuration data
148 * @engine_idx : Selected engine number
149 * @engines : Engine structure for the device attribute R/W interface
150 * @fw : Firmware data for running a LED pattern
153 struct i2c_client *cl;
155 struct lp55xx_platform_data *pdata;
156 struct mutex lock; /* lock for user-space interface */
158 struct lp55xx_device_config *cfg;
159 enum lp55xx_engine_index engine_idx;
160 struct lp55xx_engine engines[LP55XX_ENGINE_MAX];
161 const struct firmware *fw;
166 * @chan_nr : Channel number
167 * @cdev : LED class device
168 * @mc_cdev : Multi color class device
169 * @color_components: Multi color LED map information
170 * @led_current : Current setting at each led channel
171 * @max_current : Maximun current at each led channel
172 * @brightness : Brightness value
173 * @chip : The lp55xx chip data
177 struct led_classdev cdev;
178 struct led_classdev_mc mc_cdev;
182 struct lp55xx_chip *chip;
185 /* register access */
186 extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
187 extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
188 extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
191 /* external clock detection */
192 extern bool lp55xx_is_extclk_used(struct lp55xx_chip *chip);
194 /* common device init/deinit functions */
195 extern int lp55xx_init_device(struct lp55xx_chip *chip);
196 extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
198 /* common LED class device functions */
199 extern int lp55xx_register_leds(struct lp55xx_led *led,
200 struct lp55xx_chip *chip);
202 /* common device attributes functions */
203 extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
204 extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
206 /* common device tree population function */
207 extern struct lp55xx_platform_data
208 *lp55xx_of_populate_pdata(struct device *dev, struct device_node *np,
209 struct lp55xx_chip *chip);
211 #endif /* _LEDS_LP55XX_COMMON_H */