Messages in this thread Patch in this message | | | From | "Kim, Milo" <> | Subject | [PATCH 18/33] leds-lp55xx: add new lp55xx_register_sysfs() for FW interface | Date | Wed, 12 Dec 2012 14:02:11 +0000 |
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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> --- drivers/leds/leds-lp55xx-common.c | 16 ++++++++++++++++ drivers/leds/leds-lp55xx-common.h | 4 ++++ 2 files changed, 20 insertions(+)
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index 470601b..4995369 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); @@ -364,3 +372,11 @@ 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); diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h index c69c73a..2972bae 100644 --- a/drivers/leds/leds-lp55xx-common.h +++ b/drivers/leds/leds-lp55xx-common.h @@ -102,4 +102,8 @@ 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 */ -- 1.7.9.5
Best Regards, Milo
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