platform/x86: Add Intel ishtp eclite driver

This driver is for accessing the PSE (Programmable Service Engine) - an
Embedded Controller like IP - using ISHTP (Integratd Sensor Hub Transport
Protocol) to get battery, thermal and UCSI (USB Type-C Connector System
Software Interface) related data from the platform.

Signed-off-by: K Naduvalath, Sumesh <sumesh.k.naduvalath@intel.com>
Reviewed-by: Mark Gross <mgross@linux.intel.com>
Link: https://lore.kernel.org/r/20210913051056.28736-1-sumesh.k.naduvalath@intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

MAINTAINERS

@@ -9479,6 +9479,12 @@ L:	linux-crypto@vger.kernel.org
 S:	Maintained
 F:	drivers/crypto/ixp4xx_crypto.c
 
+INTEL ISHTP ECLITE DRIVER
+M:	Sumesh K Naduvalath <sumesh.k.naduvalath@intel.com>
+L:	platform-driver-x86@vger.kernel.org
+S:	Supported
+F:	drivers/platform/x86/intel/ishtp_eclite.c
+
 INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
 M:	Krzysztof Halasa <khalasa@piap.pl>
 S:	Maintained

drivers/platform/x86/intel/Kconfig

@@ -102,6 +102,22 @@ config INTEL_CHTDC_TI_PWRBTN
 	  To compile this driver as a module, choose M here: the module
 	  will be called intel_chtdc_ti_pwrbtn.
 
+config INTEL_ISHTP_ECLITE
+	tristate "Intel ISHTP eclite controller Driver"
+	depends on INTEL_ISH_HID
+	depends on ACPI
+	help
+	  This driver is for accessing the PSE (Programmable Service Engine) -
+	  an Embedded Controller like IP - using ISHTP (Integrated Sensor Hub
+	  Transport Protocol) to get battery, thermal and UCSI (USB Type-C
+	  Connector System Software Interface) related data from the platform.
+	  Users who don't want to use discrete Embedded Controller on Intel's
+	  Elkhartlake platform can leverage this integrated solution of
+	  ECLite which is part of PSE subsystem.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called intel_ishtp_eclite.
+
 config INTEL_MRFLD_PWRBTN
 	tristate "Intel Merrifield Basin Cove power button driver"
 	depends on INTEL_SOC_PMIC_MRFLD

drivers/platform/x86/intel/Makefile

@@ -21,6 +21,7 @@ intel-vbtn-y				:= vbtn.o
 obj-$(CONFIG_INTEL_VBTN)		+= intel-vbtn.o
 
 # Intel miscellaneous drivers
+obj-$(CONFIG_INTEL_ISHTP_ECLITE)	+= ishtp_eclite.o
 intel_int0002_vgpio-y			:= int0002_vgpio.o
 obj-$(CONFIG_INTEL_INT0002_VGPIO)	+= intel_int0002_vgpio.o
 intel_oaktrail-y			:= oaktrail.o