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-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,
-};