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Diffstat (limited to 'Documentation/leds/leds-lp5523.txt')
-rw-r--r-- | Documentation/leds/leds-lp5523.txt | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/Documentation/leds/leds-lp5523.txt b/Documentation/leds/leds-lp5523.txt deleted file mode 100644 index 0961a060fc4d..000000000000 --- a/Documentation/leds/leds-lp5523.txt +++ /dev/null @@ -1,130 +0,0 @@ -Kernel driver for lp5523 -======================== - -* National Semiconductor LP5523 led driver chip -* Datasheet: http://www.national.com/pf/LP/LP5523.html - -Authors: Mathias Nyman, Yuri Zaporozhets, Samu Onkalo -Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com) - -Description ------------ -LP5523 can drive up to 9 channels. Leds can be controlled directly via -the led class control interface. -The name of each channel is configurable in the platform data - name and label. -There are three options to make the channel name. - -a) Define the 'name' in the platform data -To make specific channel name, then use 'name' platform data. -/sys/class/leds/R1 (name: 'R1') -/sys/class/leds/B1 (name: 'B1') - -b) Use the 'label' with no 'name' field -For one device name with channel number, then use 'label'. -/sys/class/leds/RGB:channelN (label: 'RGB', N: 0 ~ 8) - -c) Default -If both fields are NULL, 'lp5523' is used by default. -/sys/class/leds/lp5523:channelN (N: 0 ~ 8) - -LP5523 has the internal program memory for running various LED patterns. -There are two ways to run LED patterns. - -1) Legacy interface - enginex_mode, enginex_load and enginex_leds - Control interface for the engines: - x is 1 .. 3 - enginex_mode : disabled, load, run - enginex_load : microcode load - enginex_leds : led mux control - - cd /sys/class/leds/lp5523:channel2/device - echo "load" > engine3_mode - echo "9d80400004ff05ff437f0000" > engine3_load - echo "111111111" > engine3_leds - echo "run" > engine3_mode - - To stop the engine: - echo "disabled" > engine3_mode - -2) Firmware interface - LP55xx common interface - For the details, please refer to 'firmware' section in leds-lp55xx.txt - -LP5523 has three master faders. If a channel is mapped to one of -the master faders, its output is dimmed based on the value of the master -fader. - -For example, - - echo "123000123" > master_fader_leds - -creates the following channel-fader mappings: - - channel 0,6 to master_fader1 - channel 1,7 to master_fader2 - channel 2,8 to master_fader3 - -Then, to have 25% of the original output on channel 0,6: - - echo 64 > master_fader1 - -To have 0% of the original output (i.e. no output) channel 1,7: - - echo 0 > master_fader2 - -To have 100% of the original output (i.e. no dimming) on channel 2,8: - - echo 255 > master_fader3 - -To clear all master fader controls: - - echo "000000000" > master_fader_leds - -Selftest uses always the current from the platform data. - -Each channel contains led current settings. -/sys/class/leds/lp5523:channel2/led_current - RW -/sys/class/leds/lp5523:channel2/max_current - RO -Format: 10x mA i.e 10 means 1.0 mA - -Example platform data: - -Note - chan_nr can have values between 0 and 8. - -static struct lp55xx_led_config lp5523_led_config[] = { - { - .name = "D1", - .chan_nr = 0, - .led_current = 50, - .max_current = 130, - }, -... - { - .chan_nr = 8, - .led_current = 50, - .max_current = 130, - } -}; - -static int lp5523_setup(void) -{ - /* Setup HW resources */ -} - -static void lp5523_release(void) -{ - /* Release HW resources */ -} - -static void lp5523_enable(bool state) -{ - /* Control chip enable signal */ -} - -static struct lp55xx_platform_data lp5523_platform_data = { - .led_config = lp5523_led_config, - .num_channels = ARRAY_SIZE(lp5523_led_config), - .clock_mode = LP55XX_CLOCK_EXT, - .setup_resources = lp5523_setup, - .release_resources = lp5523_release, - .enable = lp5523_enable, -}; |