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author | Milo(Woogyom) Kim | 2013-02-05 11:15:27 +0100 |
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committer | Bryan Wu | 2013-02-07 00:59:28 +0100 |
commit | b3b6f8119d752c969c6394314dc7ab80e6611111 (patch) | |
tree | a1a52139c9e8bf3280cd6bc3553419fcc697dbdd /drivers/leds/leds-lp55xx-common.c | |
parent | leds-lp55xx: fix error condition in lp55xx_register_leds() (diff) | |
download | kernel-qcow2-linux-b3b6f8119d752c969c6394314dc7ab80e6611111.tar.gz kernel-qcow2-linux-b3b6f8119d752c969c6394314dc7ab80e6611111.tar.xz kernel-qcow2-linux-b3b6f8119d752c969c6394314dc7ab80e6611111.zip |
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>
Diffstat (limited to 'drivers/leds/leds-lp55xx-common.c')
-rw-r--r-- | drivers/leds/leds-lp55xx-common.c | 16 |
1 files changed, 16 insertions, 0 deletions
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 <milo.kim@ti.com>"); MODULE_DESCRIPTION("LP55xx Common Driver"); MODULE_LICENSE("GPL"); |