platform/x86: Move AMD platform drivers to separate directory

Currently, AMD supported platform drivers are grouped under generic "x86"
folder structure. Move the current drivers (amd-pmc and amd_hsmp) to a
separate directory. This would also mean the newer driver submissions to
pdx86 subsystem in the future will also land in AMD specific directory.

Reviewed-by: Naveen Krishna Chatradhi <NaveenKrishna.Chatradhi@amd.com>
Tested-by: Suma Hegde <suma.hegde@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20220608193212.2827257-1-Shyam-sundar.S-k@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

MAINTAINERS

@@ -996,7 +996,7 @@ AMD PMC DRIVER
 M:	Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
 L:	platform-driver-x86@vger.kernel.org
 S:	Maintained
-F:	drivers/platform/x86/amd-pmc.*
+F:	drivers/platform/x86/amd/pmc.c
 
 AMD HSMP DRIVER
 M:	Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com>
@@ -1006,7 +1006,7 @@ S:	Maintained
 F:	Documentation/x86/amd_hsmp.rst
 F:	arch/x86/include/asm/amd_hsmp.h
 F:	arch/x86/include/uapi/asm/amd_hsmp.h
-F:	drivers/platform/x86/amd_hsmp.c
+F:	drivers/platform/x86/amd/hsmp.c
 
 AMD POWERPLAY AND SWSMU
 M:	Evan Quan <evan.quan@amd.com>

drivers/platform/x86/Kconfig

@@ -196,32 +196,7 @@ config ACER_WMI
 	  If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
 	  here.
 
-config AMD_PMC
-	tristate "AMD SoC PMC driver"
-	depends on ACPI && PCI && RTC_CLASS
-	help
-	  The driver provides support for AMD Power Management Controller
-	  primarily responsible for S2Idle transactions that are driven from
-	  a platform firmware running on SMU. This driver also provides a debug
-	  mechanism to investigate the S2Idle transactions and failures.
-
-	  Say Y or M here if you have a notebook powered by AMD RYZEN CPU/APU.
-
-	  If you choose to compile this driver as a module the module will be
-	  called amd-pmc.
-
-config AMD_HSMP
-	tristate "AMD HSMP Driver"
-	depends on AMD_NB && X86_64
-	help
-	  The driver provides a way for user space tools to monitor and manage
-	  system management functionality on EPYC server CPUs from AMD.
-
-	  Host System Management Port (HSMP) interface is a mailbox interface
-	  between the x86 core and the System Management Unit (SMU) firmware.
-
-	  If you choose to compile this driver as a module the module will be
-	  called amd_hsmp.
+source "drivers/platform/x86/amd/Kconfig"
 
 config ADV_SWBUTTON
 	tristate "Advantech ACPI Software Button Driver"

drivers/platform/x86/Makefile

@@ -23,8 +23,7 @@ obj-$(CONFIG_ACER_WIRELESS)	+= acer-wireless.o
 obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o
 
 # AMD
-obj-$(CONFIG_AMD_PMC)		+= amd-pmc.o
-obj-$(CONFIG_AMD_HSMP)		+= amd_hsmp.o
+obj-y				+= amd/
 
 # Advantech
 obj-$(CONFIG_ADV_SWBUTTON)	+= adv_swbutton.o

drivers/platform/x86/amd/Kconfig

@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# AMD x86 Platform Specific Drivers
+#
+
+config AMD_PMC
+	tristate "AMD SoC PMC driver"
+	depends on ACPI && PCI && RTC_CLASS
+	help
+	  The driver provides support for AMD Power Management Controller
+	  primarily responsible for S2Idle transactions that are driven from
+	  a platform firmware running on SMU. This driver also provides a debug
+	  mechanism to investigate the S2Idle transactions and failures.
+
+	  Say Y or M here if you have a notebook powered by AMD RYZEN CPU/APU.
+
+	  If you choose to compile this driver as a module the module will be
+	  called amd-pmc.
+
+config AMD_HSMP
+	tristate "AMD HSMP Driver"
+	depends on AMD_NB && X86_64
+	help
+	  The driver provides a way for user space tools to monitor and manage
+	  system management functionality on EPYC server CPUs from AMD.
+
+	  Host System Management Port (HSMP) interface is a mailbox interface
+	  between the x86 core and the System Management Unit (SMU) firmware.
+
+	  If you choose to compile this driver as a module the module will be
+	  called amd_hsmp.

drivers/platform/x86/amd/Makefile

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for drivers/platform/x86/amd
+# AMD x86 Platform-Specific Drivers
+#
+
+amd-pmc-y			:= pmc.o
+obj-$(CONFIG_AMD_PMC)		+= amd-pmc.o
+amd_hsmp-y			:= hsmp.o
+obj-$(CONFIG_AMD_HSMP)		+= amd_hsmp.o