mei: Add MEI hardware support for IVSC device

The protocol used for the IVSC device to communicate with HOST is MEI.
The MEI hardware interfaces for the IVSC device are implemented.

The APIs are exposed by MEI framework to mei clients, e.g. mei_csi and
mei_ace.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Reviewed-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Hao Yao <hao.yao@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/1701651344-20723-3-git-send-email-wentong.wu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/Kconfig

@@ -71,6 +71,19 @@ config INTEL_MEI_VSC_HW
 	  This driver can also be built as a module. If so, the module
 	  will be called mei-vsc-hw.
 
+config INTEL_MEI_VSC
+	tristate "Intel visual sensing controller device with ME interface"
+	depends on INTEL_MEI_VSC_HW
+	depends on INTEL_MEI
+	help
+	  Intel MEI over SPI driver for Intel visual sensing controller
+	  (IVSC) device embedded in IA platform. It supports camera sharing
+	  between IVSC for context sensing and IPU for typical media usage.
+	  Select this config should enable transport layer for IVSC device.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called mei-vsc.
+
 source "drivers/misc/mei/hdcp/Kconfig"
 source "drivers/misc/mei/pxp/Kconfig"
 source "drivers/misc/mei/gsc_proxy/Kconfig"

drivers/misc/mei/Makefile

@@ -35,3 +35,6 @@ obj-$(CONFIG_INTEL_MEI_GSC_PROXY) += gsc_proxy/
 obj-$(CONFIG_INTEL_MEI_VSC_HW) += mei-vsc-hw.o
 mei-vsc-hw-y := vsc-tp.o
 mei-vsc-hw-y += vsc-fw-loader.o
+
+obj-$(CONFIG_INTEL_MEI_VSC) += mei-vsc.o
+mei-vsc-y := platform-vsc.o