usb: typec: Driver for Cypress CCG USB Power Delivery Controllers

This is preliminary driver for CCG PD controllers that shows
the status of the ports and partners attached to them, but
does not support any operations. So role swapping, data nor
power, is not possible. Alternate modes are not yet
supported, and cables and cable plugs are also not
registered.

The driver also does not support firmware upgrade at this
stage.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

drivers/usb/typec/Kconfig

@@ -46,6 +46,8 @@ menuconfig TYPEC
 
 if TYPEC
 
+source "drivers/usb/typec/ccg/Kconfig"
+
 source "drivers/usb/typec/tcpm/Kconfig"
 
 source "drivers/usb/typec/ucsi/Kconfig"

drivers/usb/typec/Makefile

@@ -3,6 +3,7 @@ obj-$(CONFIG_TYPEC)		+= typec.o
 typec-y				:= class.o mux.o bus.o
 obj-$(CONFIG_TYPEC)		+= altmodes/
 obj-$(CONFIG_TYPEC_TCPM)	+= tcpm/
+obj-$(CONFIG_TYPEC_CCG_HPI)	+= ccg/
 obj-$(CONFIG_TYPEC_UCSI)	+= ucsi/
 obj-$(CONFIG_TYPEC_HD3SS3220)	+= hd3ss3220.o
 obj-$(CONFIG_TYPEC_TPS6598X)	+= tps6598x.o

drivers/usb/typec/ccg/Kconfig

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config TYPEC_CCG_HPI
+	tristate "Cypress CCG Host Processor Interface"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  This driver adds support for Cypress CCG1, CCG2, CCG3, CCG4, CCG5 and
+	  CCG6 USB Power Delivery controllers. The primary interface with
+	  Cypress CCGx USB PD controllers is called HPI (Host Processor
+	  Interface). Later generations (CCG4, CCG5 and CCG6) also support UCSI,
+	  but Cypress CCGx UCSI support is handled in its own driver ucsi_ccg.c.
+

drivers/usb/typec/ccg/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_TYPEC_CCG_HPI)	+= hpi.o