[PATCH v6 05/11] riscv: Kconfig.socs: Split ARCH_CANAAN and SOC_CANAAN_K210

[Yangyu Chen]

Since SOC_FOO should be deprecated from patch [1], and cleanup for other
SoCs is already on the mailing list [2,3,4], we remove the use of
SOC_CANAAN and use ARCH_CANAAN for SoCs vendored by Canaan instead from
now on. And allows ARCH_CANAAN to be selected for other Canaan SoCs.

Then, since we have Canaan Kendryte K230 with MMU now, the use of
SOC_CANAAN is no longer only referred to K210. Thus, we introduce a new
symbol SOC_CANAAN_K210 for any conditional code or driver selection
specific to the K210, so users will not try to build some K210-specific
things when MMU is enabled and see it fails to boot on K210.

[1] https://lore.kernel.org/linux-riscv/20221121221414.109965-1-conor@kernel.org/
[2] https://lore.kernel.org/linux-riscv/20240305-praying-clad-c4fbcaa7ed0a@spud/
[3] https://lore.kernel.org/linux-riscv/20240305-fled-undrilled-41dc0c46bb29@spud/
[4] https://lore.kernel.org/linux-riscv/20240305-stress-earflap-d7ddb8655a4d@spud/

Signed-off-by: Yangyu Chen <cyy at cyyself.name>
---
 arch/riscv/Kconfig.socs                        | 8 +++++---
 arch/riscv/Makefile                            | 2 +-
 arch/riscv/configs/nommu_k210_defconfig        | 3 ++-
 arch/riscv/configs/nommu_k210_sdcard_defconfig | 3 ++-
 4 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 623de5f8a208..5710aee456ac 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -72,11 +72,13 @@ config SOC_VIRT
 	  This enables support for QEMU Virt Machine.
 
 config ARCH_CANAAN
-	def_bool SOC_CANAAN
+	bool "Canaan Kendryte SoC"
+	help
+	  This enables support for Canaan Kendryte SoC platform hardware.
 
-config SOC_CANAAN
+config SOC_CANAAN_K210
 	bool "Canaan Kendryte K210 SoC"
-	depends on !MMU
+	depends on !MMU && ARCH_CANAAN
 	select CLINT_TIMER if RISCV_M_MODE
 	select ARCH_HAS_RESET_CONTROLLER
 	select PINCTRL
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 0b7d109258e7..294b2b3e8e6a 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -149,7 +149,7 @@ vdso-install-y			+= arch/riscv/kernel/vdso/vdso.so.dbg
 vdso-install-$(CONFIG_COMPAT)	+= arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg:../compat_vdso/compat_vdso.so
 
 ifneq ($(CONFIG_XIP_KERNEL),y)
-ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_ARCH_CANAAN),yy)
+ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN_K210),yy)
 KBUILD_IMAGE := $(boot)/loader.bin
 else
 ifeq ($(CONFIG_EFI_ZBOOT),)
diff --git a/arch/riscv/configs/nommu_k210_defconfig b/arch/riscv/configs/nommu_k210_defconfig
index 7e75200543f4..2552e78074a3 100644
--- a/arch/riscv/configs/nommu_k210_defconfig
+++ b/arch/riscv/configs/nommu_k210_defconfig
@@ -27,7 +27,8 @@ CONFIG_EXPERT=y
 CONFIG_SLUB=y
 CONFIG_SLUB_TINY=y
 # CONFIG_MMU is not set
-CONFIG_SOC_CANAAN=y
+CONFIG_ARCH_CANAAN=y
+CONFIG_SOC_CANAAN_K210=y
 CONFIG_NONPORTABLE=y
 CONFIG_SMP=y
 CONFIG_NR_CPUS=2
diff --git a/arch/riscv/configs/nommu_k210_sdcard_defconfig b/arch/riscv/configs/nommu_k210_sdcard_defconfig
index 0ba353e9ca71..8f67fb830585 100644
--- a/arch/riscv/configs/nommu_k210_sdcard_defconfig
+++ b/arch/riscv/configs/nommu_k210_sdcard_defconfig
@@ -19,7 +19,8 @@ CONFIG_EXPERT=y
 CONFIG_SLUB=y
 CONFIG_SLUB_TINY=y
 # CONFIG_MMU is not set
-CONFIG_SOC_CANAAN=y
+CONFIG_ARCH_CANAAN=y
+CONFIG_SOC_CANAAN_K210=y
 CONFIG_NONPORTABLE=y
 CONFIG_SMP=y
 CONFIG_NR_CPUS=2
-- 
2.43.0