summaryrefslogtreecommitdiff
path: root/drivers/leds/leds-lp5521.c
diff options
context:
space:
mode:
authorMilo(Woogyom) Kim <milo.kim@ti.com>2013-02-05 14:09:32 +0400
committerBryan Wu <cooloney@gmail.com>2013-02-07 03:59:28 +0400
commita96bfa135ddc8045166fc6311ce4d21bfcb8d13d (patch)
tree405bc5264b0b09af0d77db11cdae2923279db188 /drivers/leds/leds-lp5521.c
parenta6e4679a09a0a2bcfa63074272fc9fb2a40f11ad (diff)
downloadlinux-a96bfa135ddc8045166fc6311ce4d21bfcb8d13d.tar.xz
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-lp5521.c')
-rw-r--r--drivers/leds/leds-lp5521.c74
1 files changed, 8 insertions, 66 deletions
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 6efbb7ec0e2d..7133af824b5e 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -134,6 +134,13 @@ static inline void lp5521_wait_enable_done(void)
usleep_range(500, 600);
}
+static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
+}
+
static inline struct lp5521_led *cdev_to_led(struct led_classdev *cdev)
{
return container_of(cdev, struct lp5521_led, cdev);
@@ -229,13 +236,6 @@ static int lp5521_load_program(struct lp5521_engine *eng, const u8 *pattern)
return lp5521_write(client, LP5521_REG_OP_MODE, mode);
}
-static int lp5521_set_led_current(struct lp5521_chip *chip, int led, u8 curr)
-{
- return lp5521_write(chip->client,
- LP5521_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
- curr);
-}
-
static int lp5521_post_init_device(struct lp55xx_chip *chip)
{
int ret;
@@ -462,54 +462,6 @@ 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 lp5521_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 lp5521_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 lp5521_led *led = cdev_to_led(led_cdev);
- struct lp5521_chip *chip = led_to_lp5521(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 = lp5521_set_led_current(chip, led->id, curr);
- mutex_unlock(&chip->lock);
-
- if (ret < 0)
- return ret;
-
- led->led_current = (u8)curr;
-
- return len;
-}
-
static ssize_t lp5521_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -615,18 +567,7 @@ static ssize_t store_led_pattern(struct device *dev,
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 *lp5521_led_attributes[] = {
- &dev_attr_led_current.attr,
- &dev_attr_max_current.attr,
- NULL,
-};
-
static struct attribute_group lp5521_led_attribute_group = {
- .attrs = lp5521_led_attributes
};
/* device attributes */
@@ -700,6 +641,7 @@ static struct lp55xx_device_config lp5521_cfg = {
.max_channel = LP5521_MAX_LEDS,
.post_init_device = lp5521_post_init_device,
.brightness_work_fn = lp5521_led_brightness_work,
+ .set_led_current = lp5521_set_led_current,
};
static int lp5521_probe(struct i2c_client *client,