color. Write the 24-bit hexadecimal color to change the current
LED color. The default color is full white (0xFFFFFF).
For instance, set the color to green with: echo 00FF00 > rgb
-
-What: /sys/class/leds/blink1::<serial>/fade
-Date: January 2013
-Contact: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
-Description: This attribute allows to set a fade time in milliseconds for
- the next color change. Read the attribute to know the current
- fade time. The default value is set to 0 (no fade time). For
- instance, set a fade time of 2 seconds with: echo 2000 > fade
* @hdev: HID device.
* @led_cdev: LED class instance.
* @rgb: 8-bit per channel RGB notation.
- * @fade: fade time in hundredths of a second.
* @brightness: brightness coefficient.
*/
struct blink1_data {
struct hid_device *hdev;
struct led_classdev led_cdev;
u32 rgb;
- u16 fade;
u8 brightness;
};
buf[4] = DIV_ROUND_CLOSEST(blink1_rgb_to_b(data->rgb), coef);
}
- if (data->fade) {
- buf[1] = 'c';
- buf[5] = (data->fade & 0xFF00) >> 8;
- buf[6] = (data->fade & 0x00FF);
- }
-
return blink1_send_command(data, buf);
}
static DEVICE_ATTR(rgb, S_IRUGO | S_IWUSR, blink1_show_rgb, blink1_store_rgb);
-static ssize_t blink1_show_fade(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct blink1_data *data = dev_get_drvdata(dev->parent);
-
- return sprintf(buf, "%d\n", data->fade * 10);
-}
-
-static ssize_t blink1_store_fade(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
-{
- struct blink1_data *data = dev_get_drvdata(dev->parent);
- long unsigned int fade;
- int ret;
-
- ret = kstrtoul(buf, 10, &fade);
- if (ret)
- return ret;
-
- /* blink(1) accepts 16-bit fade time, number of 10ms ticks */
- fade = DIV_ROUND_CLOSEST(fade, 10);
- if (fade > 65535)
- return -EINVAL;
-
- data->fade = fade;
-
- return count;
-}
-
-static DEVICE_ATTR(fade, S_IRUGO | S_IWUSR,
- blink1_show_fade, blink1_store_fade);
-
static const struct attribute_group blink1_sysfs_group = {
.attrs = (struct attribute *[]) {
&dev_attr_rgb.attr,
- &dev_attr_fade.attr,
NULL
},
};