[tip: x86/cpu] x86/cpu, x86/platform, watchdog: Remove CONFIG_X86_RDC321X support

[tip-bot2 for Ingo Molnar]

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     db1931e39ba15827eb1889594916b80227b7956c
Gitweb:        https://git.kernel.org/tip/db1931e39ba15827eb1889594916b80227b7956c
Author:        Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate:    Fri, 25 Apr 2025 10:42:02 +02:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Wed, 06 May 2026 08:04:19 +02:00

x86/cpu, x86/platform, watchdog: Remove CONFIG_X86_RDC321X support

This depends on M486 CPU support, which has been removed.

Note that we still keep the RDC321X MFD, watchdog and GPIO
drivers, because apparently there were 586/686 CPUs offered with the
RDC321X, according to Arnd Bergmann:

| "the [RDC321X] product line is still actively developed by RDC
|  and DM&P, and I suspect that some of the drivers are still used
|  on 586tsc-class (vortex86dx, vortex86mx) and 686-class
|  (vortex86dx3, vortex86ex) SoCs that do run modern kernels and
|  get updates."

For this reason, update the watchdog driver and offer it on
the broader 32-bit landscape, which has been COMPILE_TEST=y
build-tested previously already:

  -       depends on X86_RDC321X || COMPILE_TEST
  +       depends on X86_32 || COMPILE_TEST

The MFD and GPIO drivers were already independent of CONFIG_X86_RDC321X.

Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20250425084216.3913608-6-mingo@xxxxxxxxxx
---
 arch/x86/Kconfig         | 11 -----------
 drivers/watchdog/Kconfig |  2 +-
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f3f7cb0..6865471 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -695,17 +695,6 @@ config X86_INTEL_QUARK
 	  Say Y here if you have a Quark based system such as the Arduino
 	  compatible Intel Galileo.
 
-config X86_RDC321X
-	bool "RDC R-321x SoC"
-	depends on X86_32
-	depends on X86_EXTENDED_PLATFORM
-	select M486
-	select X86_REBOOTFIXUPS
-	help
-	  This option is needed for RDC R-321x system-on-chip, also known
-	  as R-8610-(G).
-	  If you don't have one of these chips, you should say N here.
-
 config X86_INTEL_LPSS
 	bool "Intel Low Power Subsystem Support"
 	depends on X86 && ACPI && PCI
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index dc78729..6a9695a 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1547,7 +1547,7 @@ config NV_TCO
 
 config RDC321X_WDT
 	tristate "RDC R-321x SoC watchdog"
-	depends on X86_RDC321X || COMPILE_TEST
+	depends on X86_32 || COMPILE_TEST
 	depends on PCI
 	help
 	  This is the driver for the built in hardware watchdog