media: cec: i2c: ch7322: Add ch7322 CEC controller driver

Add a CEC device driver for the Chrontel ch7322 CEC conroller.
This is an I2C device capable of sending and receiving CEC messages.

Signed-off-by: Jeff Chase <jnchase@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -4107,6 +4107,7 @@ L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/devicetree/bindings/media/i2c/chontel,ch7322.yaml
+F:	drivers/media/cec/i2c/ch7322.c
 
 CIRRUS LOGIC AUDIO CODEC DRIVERS
 M:	James Schulman <james.schulman@cirrus.com>

drivers/media/cec/Kconfig

@@ -33,6 +33,7 @@ menuconfig MEDIA_CEC_SUPPORT
 	  adapter that supports HDMI CEC.
 
 if MEDIA_CEC_SUPPORT
+source "drivers/media/cec/i2c/Kconfig"
 source "drivers/media/cec/platform/Kconfig"
 source "drivers/media/cec/usb/Kconfig"
 endif

drivers/media/cec/Makefile

@@ -1,2 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-y += core/ platform/ usb/
+obj-y += core/ i2c/ platform/ usb/

drivers/media/cec/i2c/Kconfig

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# I2C drivers
+
+config CEC_CH7322
+	tristate "Chrontel CH7322 CEC controller"
+	depends on I2C
+	select REGMAP_I2C
+	select CEC_CORE
+	help
+	  This is a driver for the Chrontel CH7322 CEC controller. It uses the
+	  generic CEC framework interface.
+	  CEC bus is present in the HDMI connector and enables communication
+	  between compatible devices.

drivers/media/cec/i2c/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the CEC I2C device drivers.
+#
+obj-$(CONFIG_CEC_CH7322) += ch7322.o