Merge: Intel THC enablement in RHEL 9

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7118

It was requested to enable Intel THC in RHEL 9 for Lunar Lake.

I don't have any Lunar Lake laptop with THC, so this is sanity only, but the functional changes are located in drivers/hid/intel-ish-hid/ a new driver, so regressions are unlikely to happen.

JIRA: https://issues.redhat.com/browse/RHEL-65754

Signed-off-by: Benjamin Tissoires <[email protected]>

Approved-by: Eder Zulian <[email protected]>
Approved-by: Bastien Nocera <[email protected]>
Approved-by: CKI KWF Bot <[email protected]>

Merged-by: Jarod Wilson <[email protected]>

Author: jarodwilson

Documentation/hid/index.rst

@@ -18,4 +18,5 @@ Human Interface Devices (HID)
 
    hid-alps
    intel-ish-hid
+   intel-thc-hid
    amd-sfh-hid

Documentation/hid/intel-thc-hid.rst

@@ -10037,6 +10037,12 @@ S:	Maintained
 F:	arch/x86/include/asm/intel_telemetry.h
 F:	drivers/platform/x86/intel/telemetry/
 
+INTEL TOUCH HOST CONTROLLER (THC) DRIVER
+M:	Even Xu <[email protected]>
+M:	Xinpeng Sun <[email protected]>
+S:	Maintained
+F:	drivers/hid/intel-thc-hid/
+
 INTEL TPMI DRIVER
 M:	Srinivas Pandruvada <[email protected]>
 L:	[email protected]

MAINTAINERS

@@ -1347,6 +1347,7 @@ source "drivers/hid/amd-sfh-hid/Kconfig"
 
 source "drivers/hid/surface-hid/Kconfig"
 
+source "drivers/hid/intel-thc-hid/Kconfig"
 
 endif # HID
 

drivers/hid/Kconfig

@@ -168,3 +168,5 @@ obj-$(INTEL_ISH_FIRMWARE_DOWNLOADER)	+= intel-ish-hid/
 obj-$(CONFIG_AMD_SFH_HID)       += amd-sfh-hid/
 
 obj-$(CONFIG_SURFACE_HID_CORE)  += surface-hid/
+
+obj-$(CONFIG_INTEL_THC_HID)     += intel-thc-hid/

drivers/hid/Makefile

@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2024, Intel Corporation.
+
+menu "Intel THC HID Support"
+	depends on X86_64 && PCI
+
+config INTEL_THC_HID
+	tristate "Intel Touch Host Controller"
+	depends on ACPI
+	help
+	  THC (Touch Host Controller) is the name of the IP block in PCH that
+	  interfaces with Touch Devices (ex: touchscreen, touchpad etc.). It
+	  is comprised of 3 key functional blocks: A natively half-duplex
+	  Quad I/O capable SPI master; a low latency I2C interface to support
+	  HIDI2C compliant devices; a hardware sequencer with Read/Write DMA
+	  capability to system memory.
+
+	  Say Y/M here if you want to support Intel THC. If unsure, say N.
+
+config INTEL_QUICKSPI
+	tristate "Intel QuickSPI driver based on Intel Touch Host Controller"
+	depends on INTEL_THC_HID
+	help
+	  Intel QuickSPI, based on Touch Host Controller (THC), implements
+	  HIDSPI (HID over SPI) protocol. It configures THC to work at SPI
+	  mode, and controls THC hardware sequencer to accelerate HIDSPI
+	  transaction flow.
+
+	  Say Y/M here if you want to support Intel QuickSPI. If unsure, say N.
+
+config INTEL_QUICKI2C
+	tristate "Intel QuickI2C driver based on Intel Touch Host Controller"
+	depends on INTEL_THC_HID
+	help
+	  Intel QuickI2C, uses Touch Host Controller (THC) hardware, implements
+	  HIDI2C (HID over I2C) protocol. It configures THC to work in I2C
+	  mode, and controls THC hardware sequencer to accelerate HIDI2C
+	  transaction flow.
+
+	  Say Y/M here if you want to support Intel QuickI2C. If unsure, say N.
+
+endmenu

drivers/hid/intel-thc-hid/Kconfig

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile - Intel Touch Host Controller (THC) drivers
+# Copyright (c) 2024, Intel Corporation.
+#
+#
+
+obj-$(CONFIG_INTEL_THC_HID) += intel-thc.o
+intel-thc-objs += intel-thc/intel-thc-dev.o
+intel-thc-objs += intel-thc/intel-thc-dma.o
+
+obj-$(CONFIG_INTEL_QUICKSPI) += intel-quickspi.o
+intel-quickspi-objs += intel-quickspi/pci-quickspi.o
+intel-quickspi-objs += intel-quickspi/quickspi-hid.o
+intel-quickspi-objs += intel-quickspi/quickspi-protocol.o
+
+obj-$(CONFIG_INTEL_QUICKI2C) += intel-quicki2c.o
+intel-quicki2c-objs += intel-quicki2c/pci-quicki2c.o
+intel-quicki2c-objs += intel-quicki2c/quicki2c-hid.o
+intel-quicki2c-objs += intel-quicki2c/quicki2c-protocol.o
+
+ccflags-y += -I $(src)/intel-thc