soc: qcom: Hide all drivers behind selectable menu

Switch from a simple menu to menuconfig, so all Qualcomm SoC drivers
will be under one selectable option, allowing to disable them all which
should make kernel configuration easier when preparing a non-Qualcomm
kernel.

This has few benefits (functional impact of this commit):

1. Allow compile testing of QCOM_OCMEM, which previously required
   ARCH_QCOM.

2. Hide behind ARCH_QCOM or COMPILE_TEST drivers specific to Qualcomm
   which should not be available to other kernel builds:
   QCOM_PMIC_PDCHARGER_ULOG, QCOM_PMIC_GLINK, QCOM_SPM and QCOM_PBS.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260711-qcom-soc-kconfig-v2-1-4a907e064281@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

drivers/soc/qcom/Kconfig

@@ -2,11 +2,21 @@
 #
 # QCOM Soc drivers
 #
-menu "Qualcomm SoC drivers"
+menuconfig QCOM_SOC
+	bool "Qualcomm SoC drivers"
+	depends on ARCH_QCOM || COMPILE_TEST
+	default ARCH_QCOM
+	help
+	  This collection of drivers is specific to Qualcomm System-on-Chips
+	  and most of them are necessary for a fully functional boot of the
+	  Linux kernel (plus a few debugging drivers).
+	  Drivers can be skipped when building Linux kernel not intended to run
+	  said processors.
+
+if QCOM_SOC
 
 config QCOM_AOSS_QMP
 	tristate "Qualcomm AOSS Driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on MAILBOX
 	depends on COMMON_CLK && PM
 	select PM_GENERIC_DOMAINS
@@ -18,7 +28,6 @@ config QCOM_AOSS_QMP
 
 config QCOM_COMMAND_DB
 	tristate "Qualcomm Command DB"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on OF_RESERVED_MEM
 	help
 	  Command DB queries shared memory by key string for shared system
@@ -28,7 +37,6 @@ config QCOM_COMMAND_DB
 
 config QCOM_GENI_SE
 	tristate "Qualcomm GENI Serial Engine Driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	help
 	  This driver is used to manage Generic Interface (GENI) firmware based
 	  Qualcomm Technologies, Inc. Universal Peripheral (QUP) Wrapper. This
@@ -37,7 +45,6 @@ config QCOM_GENI_SE
 
 config QCOM_GSBI
 	tristate "Qualcomm General Serial Bus Interface"
-	depends on ARCH_QCOM || COMPILE_TEST
 	select MFD_SYSCON
 	help
 	  Say y here to enable GSBI support.  The GSBI provides control
@@ -46,7 +53,6 @@ config QCOM_GSBI
 
 config QCOM_LLCC
 	tristate "Qualcomm LLCC driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	select REGMAP_MMIO
 	help
 	  Qualcomm Technologies, Inc. platform specific
@@ -54,17 +60,8 @@ config QCOM_LLCC
 	  SDM845. This provides interfaces to clients that use the LLCC.
 	  Say yes here to enable LLCC slice driver.
 
-config QCOM_KRYO_L2_ACCESSORS
-	bool
-	depends on (ARCH_QCOM || COMPILE_TEST) && ARM64
-
-config QCOM_MDT_LOADER
-	tristate
-	select QCOM_SCM
-
 config QCOM_OCMEM
 	tristate "Qualcomm On Chip Memory (OCMEM) driver"
-	depends on ARCH_QCOM
 	select QCOM_SCM
 	help
 	  The On Chip Memory (OCMEM) allocator allows various clients to
@@ -77,7 +74,7 @@ config QCOM_PD_MAPPER
 	select QCOM_QMI_HELPERS
 	select QCOM_PDR_MSG
 	select AUXILIARY_BUS
-	depends on NET && QRTR && (ARCH_QCOM || COMPILE_TEST)
+	depends on NET && QRTR
 	default QCOM_RPROC_COMMON
 	help
 	  The Protection Domain Mapper maps registered services to the domains
@@ -85,12 +82,6 @@ config QCOM_PD_MAPPER
 	  implementation of the service. It is a simpler alternative to the
 	  userspace daemon.
 
-config QCOM_PDR_HELPERS
-	tristate
-	select QCOM_QMI_HELPERS
-	select QCOM_PDR_MSG
-	depends on NET
-
 config QCOM_PDR_MSG
 	tristate
 
@@ -124,13 +115,8 @@ config QCOM_PMIC_GLINK
 	  Say yes here to support USB-C and battery status on modern Qualcomm
 	  platforms.
 
-config QCOM_QMI_HELPERS
-	tristate
-	depends on NET
-
 config QCOM_RAMP_CTRL
 	tristate "Qualcomm Ramp Controller driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	help
 	  The Ramp Controller is used to program the sequence ID for pulse
 	  swallowing, enable sequence and link sequence IDs for the CPU
@@ -139,7 +125,6 @@ config QCOM_RAMP_CTRL
 
 config QCOM_RMTFS_MEM
 	tristate "Qualcomm Remote Filesystem memory driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	select QCOM_SCM
 	help
 	  The Qualcomm remote filesystem memory driver is used for allocating
@@ -151,7 +136,6 @@ config QCOM_RMTFS_MEM
 
 config QCOM_RPM_MASTER_STATS
 	tristate "Qualcomm RPM Master stats"
-	depends on ARCH_QCOM || COMPILE_TEST
 	help
 	  The RPM Master sleep stats driver provides detailed per-subsystem
 	  sleep/wake data, read from the RPM message RAM. It can be used to
@@ -162,7 +146,6 @@ config QCOM_RPM_MASTER_STATS
 
 config QCOM_RPMH
 	tristate "Qualcomm RPM-Hardened (RPMH) Communication"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on (QCOM_COMMAND_DB || !QCOM_COMMAND_DB)
 	help
 	  Support for communication with the hardened-RPM blocks in
@@ -173,7 +156,6 @@ config QCOM_RPMH
 
 config QCOM_SMEM
 	tristate "Qualcomm Shared Memory Manager (SMEM)"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on HWSPINLOCK
 	help
 	  Say y here to enable support for the Qualcomm Shared Memory Manager.
@@ -182,7 +164,6 @@ config QCOM_SMEM
 
 config QCOM_SMD_RPM
 	tristate "Qualcomm Resource Power Manager (RPM) over SMD"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on RPMSG
 	depends on RPMSG_QCOM_SMD || RPMSG_QCOM_SMD=n
 	help
@@ -229,7 +210,6 @@ config QCOM_SOCINFO
 
 config QCOM_SPM
 	tristate "Qualcomm Subsystem Power Manager (SPM)"
-	depends on ARCH_QCOM || COMPILE_TEST
 	select QCOM_SCM
 	help
 	  Enable the support for the Qualcomm Subsystem Power Manager, used
@@ -238,7 +218,7 @@ config QCOM_SPM
 
 config QCOM_STATS
 	tristate "Qualcomm Sleep stats driver"
-	depends on (ARCH_QCOM && DEBUG_FS) || COMPILE_TEST
+	depends on DEBUG_FS || COMPILE_TEST
 	depends on QCOM_SMEM
 	depends on QCOM_AOSS_QMP || QCOM_AOSS_QMP=n
 	help
@@ -249,7 +229,6 @@ config QCOM_STATS
 
 config QCOM_WCNSS_CTRL
 	tristate "Qualcomm WCNSS control driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on RPMSG
 	help
 	  Client driver for the WCNSS_CTRL SMD channel, used to download nv
@@ -257,7 +236,6 @@ config QCOM_WCNSS_CTRL
 
 config QCOM_APR
 	tristate "Qualcomm APR/GPR Bus (Asynchronous/Generic Packet Router)"
-	depends on ARCH_QCOM || COMPILE_TEST
 	depends on RPMSG
 	depends on NET
 	select QCOM_PDR_HELPERS
@@ -269,7 +247,6 @@ config QCOM_APR
 
 config QCOM_ICC_BWMON
 	tristate "Qualcomm Interconnect Bandwidth Monitor driver"
-	depends on ARCH_QCOM || COMPILE_TEST
 	select PM_OPP
 	select REGMAP_MMIO
 	help
@@ -282,10 +259,6 @@ config QCOM_ICC_BWMON
 	  the fixed bandwidth votes from cpufreq (CPU nodes) thus achieve high
 	  memory throughput even with lower CPU frequencies.
 
-config QCOM_INLINE_CRYPTO_ENGINE
-	tristate
-	select QCOM_SCM
-
 config QCOM_PBS
 	tristate "PBS trigger support for Qualcomm PMICs"
 	depends on SPMI
@@ -295,7 +268,32 @@ config QCOM_PBS
 	  This module provides the APIs to the client drivers that wants to send the
 	  PBS trigger event to the PBS RAM.
 
-endmenu
+endif
+
+# Options selected by other drivers from different subsystems must be outside
+# of the menuconfig if-block:
+
+config QCOM_INLINE_CRYPTO_ENGINE
+	tristate
+	select QCOM_SCM
+
+config QCOM_KRYO_L2_ACCESSORS
+	bool
+	depends on ARM64
+
+config QCOM_MDT_LOADER
+	tristate
+	select QCOM_SCM
+
+config QCOM_PDR_HELPERS
+	tristate
+	select QCOM_QMI_HELPERS
+	select QCOM_PDR_MSG
+	depends on NET
+
+config QCOM_QMI_HELPERS
+	tristate
+	depends on NET
 
 config QCOM_UBWC_CONFIG
 	tristate