From b3b6f8119d752c969c6394314dc7ab80e6611111 Mon Sep 17 00:00:00 2001 From: "Milo(Woogyom) Kim" Date: Tue, 5 Feb 2013 19:15:27 +0900 Subject: 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 Signed-off-by: Bryan Wu --- drivers/leds/leds-lp55xx-common.c | 16 ++++++++++++++++ drivers/leds/leds-lp55xx-common.h | 4 ++++ 2 files changed, 20 insertions(+) (limited to 'drivers') diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index cd19027895e5..98407ca45e4f 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -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 "); MODULE_DESCRIPTION("LP55xx Common Driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h index 32d96828cbc6..d0be837643f0 100644 --- a/drivers/leds/leds-lp55xx-common.h +++ b/drivers/leds/leds-lp55xx-common.h @@ -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 */ -- cgit v1.2.3