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leds-lp55xx: add new lp55xx_register_sysfs() for the firmware interface 

LP55xx family chips have internal program memory which run various patterns.
 Using this memory, LEDs continue on blinking/dimming without continuous I2C
 commands. That means the I2C HOST can be entered into sleep once the memory
 is updated.

 An application can get hex data from a file and write them into
 the program memory through the I2C. This is general firwmare interface.

 This patch is the initial step for adding the firmware interface.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Milo(Woogyom) Kim 2013-02-05 19:15:27 +09:00 committed by Bryan Wu
parent d9067d2846
commit b3b6f8119d
2 changed files with 20 additions and 0 deletions
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16
drivers/leds/leds-lp55xx-common.c
View File

@ -197,6 +197,14 @@ static int lp55xx_init_led(struct lp55xx_led *led,
return 0;
}
static struct attribute *lp55xx_engine_attributes[] = {
NULL,
};
static const struct attribute_group lp55xx_engine_attr_group = {
.attrs = lp55xx_engine_attributes,
};
int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(chip->cl, reg, val);
@ -365,6 +373,14 @@ void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
}
EXPORT_SYMBOL_GPL(lp55xx_unregister_leds);
int lp55xx_register_sysfs(struct lp55xx_chip *chip)
{
struct device *dev = &chip->cl->dev;
return sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group);
}
EXPORT_SYMBOL_GPL(lp55xx_register_sysfs);
MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
MODULE_DESCRIPTION("LP55xx Common Driver");
MODULE_LICENSE("GPL");

4
drivers/leds/leds-lp55xx-common.h
View File

@ -103,4 +103,8 @@ 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);
#endif /* _LEDS_LP55XX_COMMON_H */