Subject: [PATCH RESEND] clocksource: move NXP timer selection to drivers/clocksource

From: Enric Balletbo i Serra <[email-masked]>
Date: Tue, 12 May 2026 08:45:16 +0200

From: Enric Balletbo i Serra <[email-masked]>

The Kconfig logic for selecting the scheduler clocksource on
NXP Vybrid (VF610) uses a `choice` block restricted to 32-bit ARM. This
prevents 64-bit architectures, such as the NXP S32 family, from enabling
the NXP Periodic Interrupt Timer (PIT) driver (CONFIG_NXP_PIT_TIMER).

Relocate the NXP clocksource selection from arch/arm/mach-imx/Kconfig to
drivers/clocksource/Kconfig. This allows the configuration to be shared
across different architectures.

Update the selection to include support for ARCH_S32 and add a "None"
option to allow using the standard ARM Architected Timer. The Vybrid
Global Timer option is now specifically restricted to 32-bit ARM SOC_VF610
platforms.

Fixes: bee33f22d7c3 ("clocksource/drivers/nxp-pit: Add NXP Automotive s32g2 / s32g3 support")
Signed-off-by: Enric Balletbo i Serra <[email-masked]>
---
 arch/arm/mach-imx/Kconfig   | 21 ---------------------
 drivers/clocksource/Kconfig | 31 +++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 21 deletions(-)

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 6ea1bd55acf8..a361840d7a04 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -227,27 +227,6 @@ config SOC_VF610
 	help
 	  This enables support for Freescale Vybrid VF610 processor.
 
-choice
-	prompt "Clocksource for scheduler clock"
-	depends on SOC_VF610
-	default VF_USE_ARM_GLOBAL_TIMER
-
-	config VF_USE_ARM_GLOBAL_TIMER
-		bool "Use ARM Global Timer"
-		depends on ARCH_MULTI_V7
-		select ARM_GLOBAL_TIMER
-		select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
-		help
-		  Use the ARM Global Timer as clocksource
-
-	config VF_USE_PIT_TIMER
-		bool "Use PIT timer"
-		select NXP_PIT_TIMER
-		help
-		  Use SoC Periodic Interrupt Timer (PIT) as clocksource
-
-endchoice
-
 endif
 
 endif
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index fd9112706545..b5c88ec65802 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -794,4 +794,35 @@ config RTK_SYSTIMER
 	  this option only when building for a Realtek platform or for compilation
 	  testing.
 
+choice
+	prompt "NXP clocksource for scheduler clock"
+	depends on SOC_VF610 || ARCH_S32
+	# Default to Global Timer for Vybrid (32-bit)
+	default VF_USE_ARM_GLOBAL_TIMER if SOC_VF610
+	# Default to None for S32 (64-bit)
+	default VF_TIMER_NONE if ARCH_S32
+
+	config VF_USE_ARM_GLOBAL_TIMER
+		bool "Use NXP Vybrid Global Timer"
+		# This option is ONLY visible if we are on 32-bit ARM
+		depends on ARM && SOC_VF610
+		select ARM_GLOBAL_TIMER
+		select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+		help
+		  Use the NXP Vybrid Global Timer as clocksource.
+
+	config VF_USE_PIT_TIMER
+		bool "Use NXP PIT timer"
+		select NXP_PIT_TIMER
+		help
+		  Use NXP Periodic Interrupt Timer (PIT) as clocksource.
+
+	config VF_TIMER_NONE
+		bool "None (Use standard Arch Timer)"
+		help
+		  Do not use any specific NXP timer driver. Use the standard
+		  ARM Architected Timer instead.
+
+endchoice
+
 endmenu

---
base-commit: 11439c4635edd669ae435eec308f4ab8a0804808
change-id: 20260302-fix-nxp-timer-9cb1fbd7afcd

Best regards,
-- 
Enric Balletbo i Serra <[email-masked]>