diff options
Diffstat (limited to 'Documentation/leds')
| -rw-r--r-- | Documentation/leds/leds-lp5521.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt index e3c66c64591..0e542ab3d4a 100644 --- a/Documentation/leds/leds-lp5521.txt +++ b/Documentation/leds/leds-lp5521.txt @@ -111,3 +111,41 @@ static struct lp5521_platform_data lp5521_pdata = { .clock_mode = LP5521_CLOCK_INT, .update_config = LP5521_CONFIGS, }; + +LED patterns : LP5521 has autonomous operation without external control. +Pattern data can be defined in the platform data. + +example of led pattern data : + +/* RGB(50,5,0) 500ms on, 500ms off, infinite loop */ +static u8 pattern_red[] = { + 0x40, 0x32, 0x60, 0x00, 0x40, 0x00, 0x60, 0x00, + }; + +static u8 pattern_green[] = { + 0x40, 0x05, 0x60, 0x00, 0x40, 0x00, 0x60, 0x00, + }; + +static struct lp5521_led_pattern board_led_patterns[] = { + { + .r = pattern_red, + .g = pattern_green, + .size_r = ARRAY_SIZE(pattern_red), + .size_g = ARRAY_SIZE(pattern_green), + }, +}; + +static struct lp5521_platform_data lp5521_platform_data = { + .led_config = lp5521_led_config, + .num_channels = ARRAY_SIZE(lp5521_led_config), + .clock_mode = LP5521_CLOCK_EXT, + .patterns = board_led_patterns, + .num_patterns = ARRAY_SIZE(board_led_patterns), +}; + +Then predefined led pattern(s) can be executed via the sysfs. +To start the pattern #1, +# echo 1 > /sys/bus/i2c/devices/xxxx/led_pattern +(xxxx : i2c bus & slave address) +To end the pattern, +# echo 0 > /sys/bus/i2c/devices/xxxx/led_pattern |