diff options
Diffstat (limited to 'Documentation/leds/leds-lp5521.txt')
| -rw-r--r-- | Documentation/leds/leds-lp5521.txt | 63 |
1 files changed, 7 insertions, 56 deletions
diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt index 0e542ab3d4a0..270f57196339 100644 --- a/Documentation/leds/leds-lp5521.txt +++ b/Documentation/leds/leds-lp5521.txt @@ -17,19 +17,8 @@ lp5521:channelx, where x is 0 .. 2 All three channels can be also controlled using the engine micro programs. More details of the instructions can be found from the public data sheet. -Control interface for the engines: -x is 1 .. 3 -enginex_mode : disabled, load, run -enginex_load : store program (visible only in engine load mode) - -Example (start to blink the channel 2 led): -cd /sys/class/leds/lp5521:channel2/device -echo "load" > engine3_mode -echo "037f4d0003ff6000" > engine3_load -echo "run" > engine3_mode - -stop the engine: -echo "disabled" > engine3_mode +LP5521 has the internal program memory for running various LED patterns. +For the details, please refer to 'firmware' section in leds-lp55xx.txt sysfs contains a selftest entry. The test communicates with the chip and checks that @@ -47,7 +36,7 @@ The name of each channel can be configurable. If the name field is not defined, the default name will be set to 'xxxx:channelN' (XXXX : pdata->label or i2c client name, N : channel number) -static struct lp5521_led_config lp5521_led_config[] = { +static struct lp55xx_led_config lp5521_led_config[] = { { .name = "red", .chan_nr = 0, @@ -81,10 +70,10 @@ static void lp5521_enable(bool state) /* Control of chip enable signal */ } -static struct lp5521_platform_data lp5521_platform_data = { +static struct lp55xx_platform_data lp5521_platform_data = { .led_config = lp5521_led_config, .num_channels = ARRAY_SIZE(lp5521_led_config), - .clock_mode = LP5521_CLOCK_EXT, + .clock_mode = LP55XX_CLOCK_EXT, .setup_resources = lp5521_setup, .release_resources = lp5521_release, .enable = lp5521_enable, @@ -105,47 +94,9 @@ example of update_config : LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT | \ LP5521_CLK_INT) -static struct lp5521_platform_data lp5521_pdata = { +static struct lp55xx_platform_data lp5521_pdata = { .led_config = lp5521_led_config, .num_channels = ARRAY_SIZE(lp5521_led_config), - .clock_mode = LP5521_CLOCK_INT, + .clock_mode = LP55XX_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 |