diff options
author | Milo(Woogyom) Kim <milo.kim@ti.com> | 2013-02-05 19:09:32 +0900 |
---|---|---|
committer | Bryan Wu <cooloney@gmail.com> | 2013-02-06 15:59:28 -0800 |
commit | a96bfa135ddc8045166fc6311ce4d21bfcb8d13d (patch) | |
tree | 405bc5264b0b09af0d77db11cdae2923279db188 /drivers/leds/leds-lp5523.c | |
parent | a6e4679a09a0a2bcfa63074272fc9fb2a40f11ad (diff) |
leds-lp55xx: provide common LED current setting
LED current is configurable via the sysfs.
Max current is a read-only attribute.
These attributes code can be shared in lp55xx common driver.
Device attributes: 'led_current' and 'max_current'
move to lp55xx common driver
Replaced functions:
show_max_current() => lp55xx_show_max_current()
show_current() => lp55xx_show_current()
store_current() => lp55xx_store_current()
LED setting function: set_led_current()
Current registers are device specific, so configurable function is added
in each driver.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/leds-lp5523.c')
-rw-r--r-- | drivers/leds/leds-lp5523.c | 69 |
1 files changed, 8 insertions, 61 deletions
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index 43db2429616b..dfb335420568 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -142,6 +142,13 @@ struct lp5523_chip { u8 num_leds; }; +static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) +{ + led->led_current = led_current; + lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, + led_current); +} + static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev) { return container_of(cdev, struct lp5523_led, cdev); @@ -602,68 +609,7 @@ store_mode(1) store_mode(2) store_mode(3) -static ssize_t show_max_current(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct lp5523_led *led = cdev_to_led(led_cdev); - - return sprintf(buf, "%d\n", led->max_current); -} - -static ssize_t show_current(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct lp5523_led *led = cdev_to_led(led_cdev); - - return sprintf(buf, "%d\n", led->led_current); -} - -static ssize_t store_current(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct lp5523_led *led = cdev_to_led(led_cdev); - struct lp5523_chip *chip = led_to_lp5523(led); - ssize_t ret; - unsigned long curr; - - if (kstrtoul(buf, 0, &curr)) - return -EINVAL; - - if (curr > led->max_current) - return -EINVAL; - - mutex_lock(&chip->lock); - ret = lp5523_write(chip->client, - LP5523_REG_LED_CURRENT_BASE + led->chan_nr, - (u8)curr); - mutex_unlock(&chip->lock); - - if (ret < 0) - return ret; - - led->led_current = (u8)curr; - - return len; -} - -/* led class device attributes */ -static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current); -static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL); - -static struct attribute *lp5523_led_attributes[] = { - &dev_attr_led_current.attr, - &dev_attr_max_current.attr, - NULL, -}; - static struct attribute_group lp5523_led_attribute_group = { - .attrs = lp5523_led_attributes }; /* device attributes */ @@ -780,6 +726,7 @@ static struct lp55xx_device_config lp5523_cfg = { .max_channel = LP5523_MAX_LEDS, .post_init_device = lp5523_post_init_device, .brightness_work_fn = lp5523_led_brightness_work, + .set_led_current = lp5523_set_led_current, }; static int lp5523_probe(struct i2c_client *client, |