leds: leds-lp5569: Add support for Texas Instruments LP5569

Add support for Texas Instruments LP5569 LED driver.

Texas Instruments LP5569 is 9 channels chip with programmable engines.

It almost a copy of LP5523 with fundamental changes to regs order and
regs content.

Has difference in how the clock is handled and doesn't support detecting
clock time automatically, different handling for selftest and different
scheme for the status regs.

LED chip supports ENGINE and MUX to group LED and run precompiled code
with magic values to run patterns. This is loaded via the sysfs entry
and it's passed as a string of ASCII HEX char.

One some devices using this LED Controller (a NBG7815 Router) it was
found loading big precompiled pattern with up to 96 bytes of code. To
have support for this "extended" scenario, hardcode each engine to
support 4 pages of precompiled pattern (128 bytes of code) and 1 page
for each MUX. This gives plenty of space for any kind precompiled
pattern keeping simple logic for page handling of each engine and mux.

Signed-off-by: Christian Marangi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: Ansuel

drivers/leds/Kconfig

@@ -429,16 +429,16 @@ config LEDS_LP50XX
 	  module will be called leds-lp50xx.
 
 config LEDS_LP55XX_COMMON
-	tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
+	tristate "Common Driver for TI/National LP5521/5523/55231/5562/5569/8501"
 	depends on LEDS_CLASS
 	depends on LEDS_CLASS_MULTICOLOR
 	depends on OF
 	depends on I2C
 	select FW_LOADER
 	select FW_LOADER_USER_HELPER
 	help
-	  This option supports common operations for LP5521/5523/55231/5562/8501
-	  devices.
+	  This option supports common operations for LP5521/5523/55231/5562/5569/
+	  8501 devices.
 
 config LEDS_LP5521
 	tristate "LED Support for N.S. LP5521 LED driver chip"
@@ -471,6 +471,16 @@ config LEDS_LP5562
 	  Driver provides direct control via LED class and interface for
 	  programming the engines.
 
+config LEDS_LP5569
+	tristate "LED Support for TI LP5569 LED driver chip"
+	depends on LEDS_CLASS && I2C
+	depends on LEDS_LP55XX_COMMON
+	help
+	  If you say yes here you get support for TI LP5569 LED driver.
+	  It is 9 channels chip with programmable engines.
+	  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

drivers/leds/Makefile

@@ -52,6 +52,7 @@ obj-$(CONFIG_LEDS_LP50XX)		+= leds-lp50xx.o
 obj-$(CONFIG_LEDS_LP5521)		+= leds-lp5521.o
 obj-$(CONFIG_LEDS_LP5523)		+= leds-lp5523.o
 obj-$(CONFIG_LEDS_LP5562)		+= leds-lp5562.o
+obj-$(CONFIG_LEDS_LP5569)		+= leds-lp5569.o
 obj-$(CONFIG_LEDS_LP55XX_COMMON)	+= leds-lp55xx-common.o
 obj-$(CONFIG_LEDS_LP8501)		+= leds-lp8501.o
 obj-$(CONFIG_LEDS_LP8788)		+= leds-lp8788.o