leds: support new LP8501 device - another LP55xx common

LP8501 can drive up to 9 channels like LP5523.
LEDs can be controlled directly via the I2C and programmable engines are
supported.

LP55xx common driver
 LP8501 is one of LP55xx family device, so LP55xx common code are used.
 Chip specific data is defined in the structure, 'lp55xx_device_config'.

Differences between LP8501 and LP5523
 Different register layout for LED output control and others.
 LP8501 specific feature for separate output power selection.
 LP8501 doesn't support external clock detection.
 Different programming engine data.

LP8501 specific feature - output power selection
 Output channels are selected by power selection - Vout or Vdd.
 Separate power for VDD1-6 and VDD7-9 are available.
 It is configurable in the platform data.
 To support this feature, LP55xx DT structure and header are changed.
 Device tree binding is updated as well.

LED pattern data
 Example pattern data is updated in the driver documentation.

Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index e43402dd1dea..77329ce672cb 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -194,11 +194,11 @@ config LEDS_LP3944
           module will be called leds-lp3944.
 
 config LEDS_LP55XX_COMMON
-        tristate "Common Driver for TI/National LP5521, LP5523/55231 and LP5562"
-        depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562
+        tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
+        depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501
         select FW_LOADER
         help
-          This option supports common operations for LP5521 and LP5523/55231
+          This option supports common operations for LP5521/5523/55231/5562/8501
           devices.
 
 config LEDS_LP5521
@@ -232,6 +232,18 @@ config LEDS_LP5562
           Driver provides direct control via LED class and interface for
           programming the engines.
 
+config LEDS_LP8501
+        tristate "LED Support for TI LP8501 LED driver chip"
+        depends on LEDS_CLASS && I2C
+        select LEDS_LP55XX_COMMON
+        help
+          If you say yes here you get support for TI LP8501 LED driver.
+          It is 9 channel chip with programmable engines.
+          Driver provides direct control via LED class and interface for
+          programming the engines.
+          It is similar as LP5523, but output power selection is available.
+          And register layout and engine program schemes are different.
+
 config LEDS_LP8788
         tristate "LED support for the TI LP8788 PMIC"
         depends on LEDS_CLASS