diff options
Diffstat (limited to 'drivers/leds/leds-lp55xx-common.h')
| -rw-r--r-- | drivers/leds/leds-lp55xx-common.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h new file mode 100644 index 000000000..cceab483e --- /dev/null +++ b/drivers/leds/leds-lp55xx-common.h @@ -0,0 +1,208 @@ +/* + * 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, + LP55XX_ENGINE_MAX = LP55XX_ENGINE_3, +}; + +enum lp55xx_engine_mode { + LP55XX_ENGINE_DISABLED, + LP55XX_ENGINE_LOAD, + LP55XX_ENGINE_RUN, +}; + +#define LP55XX_DEV_ATTR_RW(name, show, store) \ + DEVICE_ATTR(name, S_IRUGO | S_IWUSR, show, store) +#define LP55XX_DEV_ATTR_RO(name, show) \ + DEVICE_ATTR(name, S_IRUGO, show, NULL) +#define LP55XX_DEV_ATTR_WO(name, store) \ + DEVICE_ATTR(name, S_IWUSR, NULL, store) + +#define show_mode(nr) \ +static ssize_t show_engine##nr##_mode(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_engine_mode(dev, attr, buf, nr); \ +} + +#define store_mode(nr) \ +static ssize_t store_engine##nr##_mode(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_mode(dev, attr, buf, len, nr); \ +} + +#define show_leds(nr) \ +static ssize_t show_engine##nr##_leds(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_engine_leds(dev, attr, buf, nr); \ +} + +#define store_leds(nr) \ +static ssize_t store_engine##nr##_leds(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_leds(dev, attr, buf, len, nr); \ +} + +#define store_load(nr) \ +static ssize_t store_engine##nr##_load(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_load(dev, attr, buf, len, nr); \ +} + +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_engine + * @mode : Engine mode + * @led_mux : Mux bits for LED selection. Only used in LP5523 + */ +struct lp55xx_engine { + enum lp55xx_engine_mode mode; + u16 led_mux; +}; + +/* + * 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 + * @engines : Engine structure for the device attribute R/W interface + * @fw : Firmware data for running a LED pattern + */ +struct lp55xx_chip { + struct i2c_client *cl; + struct clk *clk; + 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; + struct lp55xx_engine engines[LP55XX_ENGINE_MAX]; + 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); + +/* external clock detection */ +extern bool lp55xx_is_extclk_used(struct lp55xx_chip *chip); + +/* 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); + +/* common device tree population function */ +extern int lp55xx_of_populate_pdata(struct device *dev, + struct device_node *np); + +#endif /* _LEDS_LP55XX_COMMON_H */ |