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Diffstat (limited to 'Documentation/leds/leds-lp5562.txt')
-rw-r--r-- | Documentation/leds/leds-lp5562.txt | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/Documentation/leds/leds-lp5562.txt b/Documentation/leds/leds-lp5562.txt deleted file mode 100644 index 5a823ff6b393..000000000000 --- a/Documentation/leds/leds-lp5562.txt +++ /dev/null @@ -1,120 +0,0 @@ -Kernel driver for LP5562 -======================== - -* TI LP5562 LED Driver - -Author: Milo(Woogyom) Kim <milo.kim@ti.com> - -Description - - LP5562 can drive up to 4 channels. R/G/B and White. - LEDs can be controlled directly via the led class control interface. - - All four channels can be also controlled using the engine micro programs. - LP5562 has the internal program memory for running various LED patterns. - For the details, please refer to 'firmware' section in leds-lp55xx.txt - -Device attribute: engine_mux - - 3 Engines are allocated in LP5562, but the number of channel is 4. - Therefore each channel should be mapped to the engine number. - Value : RGB or W - - This attribute is used for programming LED data with the firmware interface. - Unlike the LP5521/LP5523/55231, LP5562 has unique feature for the engine mux, - so additional sysfs is required. - - LED Map - Red ... Engine 1 (fixed) - Green ... Engine 2 (fixed) - Blue ... Engine 3 (fixed) - White ... Engine 1 or 2 or 3 (selective) - -How to load the program data using engine_mux - - Before loading the LP5562 program data, engine_mux should be written between - the engine selection and loading the firmware. - Engine mux has two different mode, RGB and W. - RGB is used for loading RGB program data, W is used for W program data. - - For example, run blinking green channel pattern, - echo 2 > /sys/bus/i2c/devices/xxxx/select_engine # 2 is for green channel - echo "RGB" > /sys/bus/i2c/devices/xxxx/engine_mux # engine mux for RGB - echo 1 > /sys/class/firmware/lp5562/loading - echo "4000600040FF6000" > /sys/class/firmware/lp5562/data - echo 0 > /sys/class/firmware/lp5562/loading - echo 1 > /sys/bus/i2c/devices/xxxx/run_engine - - To run a blinking white pattern, - echo 1 or 2 or 3 > /sys/bus/i2c/devices/xxxx/select_engine - echo "W" > /sys/bus/i2c/devices/xxxx/engine_mux - echo 1 > /sys/class/firmware/lp5562/loading - echo "4000600040FF6000" > /sys/class/firmware/lp5562/data - echo 0 > /sys/class/firmware/lp5562/loading - echo 1 > /sys/bus/i2c/devices/xxxx/run_engine - -How to load the predefined patterns - - Please refer to 'leds-lp55xx.txt" - -Setting Current of Each Channel - - Like LP5521 and LP5523/55231, LP5562 provides LED current settings. - The 'led_current' and 'max_current' are used. - -(Example of Platform data) - -To configure the platform specific data, lp55xx_platform_data structure is used. - -static struct lp55xx_led_config lp5562_led_config[] = { - { - .name = "R", - .chan_nr = 0, - .led_current = 20, - .max_current = 40, - }, - { - .name = "G", - .chan_nr = 1, - .led_current = 20, - .max_current = 40, - }, - { - .name = "B", - .chan_nr = 2, - .led_current = 20, - .max_current = 40, - }, - { - .name = "W", - .chan_nr = 3, - .led_current = 20, - .max_current = 40, - }, -}; - -static int lp5562_setup(void) -{ - /* setup HW resources */ -} - -static void lp5562_release(void) -{ - /* Release HW resources */ -} - -static void lp5562_enable(bool state) -{ - /* Control of chip enable signal */ -} - -static struct lp55xx_platform_data lp5562_platform_data = { - .led_config = lp5562_led_config, - .num_channels = ARRAY_SIZE(lp5562_led_config), - .setup_resources = lp5562_setup, - .release_resources = lp5562_release, - .enable = lp5562_enable, -}; - -If the current is set to 0 in the platform data, that channel is -disabled and it is not visible in the sysfs. |