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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,
-};