media: On Semi AR0521 sensor driver

The driver has been extensively tested in an i.MX6-based system.
AR0521 is a 5.7 mm x 4.3 mm, 5 MPix RGGB MIPI/HiSPi BSI CMOS sensor
from On Semiconductor.
Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

MAINTAINERS

@@ -1476,6 +1476,13 @@ S:	Supported
 W:	http://www.aquantia.com
 F:	drivers/net/ethernet/aquantia/atlantic/aq_ptp*
 
+AR0521 ON SEMICONDUCTOR CAMERA SENSOR DRIVER
+M:	Krzysztof Hałasa <khalasa@piap.pl>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/media/i2c/onnn,ar0521.yaml
+F:	drivers/media/i2c/ar0521.c
+
 ARASAN NAND CONTROLLER DRIVER
 M:	Miquel Raynal <miquel.raynal@bootlin.com>
 M:	Naga Sureshkumar Relli <nagasure@xilinx.com>

drivers/media/i2c/Kconfig

@@ -34,6 +34,19 @@ config VIDEO_APTINA_PLL
 config VIDEO_CCS_PLL
 	tristate
 
+config VIDEO_AR0521
+	tristate "ON Semiconductor AR0521 sensor support"
+	depends on I2C && VIDEO_V4L2
+	select MEDIA_CONTROLLER
+	select VIDEO_V4L2_SUBDEV_API
+	select V4L2_FWNODE
+	help
+	  This is a Video4Linux2 sensor driver for the ON Semiconductor
+	  AR0521 camera.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ar0521.
+
 config VIDEO_HI556
 	tristate "Hynix Hi-556 sensor support"
 	depends on I2C && VIDEO_DEV

drivers/media/i2c/Makefile

@@ -19,6 +19,7 @@ obj-$(CONFIG_VIDEO_ADV7842) += adv7842.o
 obj-$(CONFIG_VIDEO_AK7375) += ak7375.o
 obj-$(CONFIG_VIDEO_AK881X) += ak881x.o
 obj-$(CONFIG_VIDEO_APTINA_PLL) += aptina-pll.o
+obj-$(CONFIG_VIDEO_AR0521) += ar0521.o
 obj-$(CONFIG_VIDEO_BT819) += bt819.o
 obj-$(CONFIG_VIDEO_BT856) += bt856.o
 obj-$(CONFIG_VIDEO_BT866) += bt866.o