leds: sy7802: Add support for Silergy SY7802 flash LED controller

The SY7802 is a current-regulated charge pump which can regulate two
current levels for Flash and Torch modes.

It is a high-current synchronous boost converter with 2-channel high
side current sources. Each channel is able to deliver 900mA current.
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Link: https://lore.kernel.org/r/20240624-sy7802-v5-2-7abc9d96bfa6@apitzsch.euSigned-off-by: Lee Jones <lee@kernel.org>

drivers/leds/flash/Kconfig

@@ -121,4 +121,15 @@ config LEDS_SGM3140
 	  This option enables support for the SGM3140 500mA Buck/Boost Charge
 	  Pump LED Driver.
 
+config LEDS_SY7802
+	tristate "LED support for the Silergy SY7802"
+	depends on I2C && OF
+	depends on GPIOLIB
+	select REGMAP_I2C
+	help
+	  This option enables support for the SY7802 flash LED controller.
+	  SY7802 includes torch and flash functions with programmable current.
+
+	  This driver can be built as a module, it will be called "leds-sy7802".
+
 endif # LEDS_CLASS_FLASH

drivers/leds/flash/Makefile

@@ -11,3 +11,4 @@ obj-$(CONFIG_LEDS_QCOM_FLASH)	+= leds-qcom-flash.o
 obj-$(CONFIG_LEDS_RT4505)	+= leds-rt4505.o
 obj-$(CONFIG_LEDS_RT8515)	+= leds-rt8515.o
 obj-$(CONFIG_LEDS_SGM3140)	+= leds-sgm3140.o
+obj-$(CONFIG_LEDS_SY7802)	+= leds-sy7802.o