apache · linguini1 · Sep 12, 2025 · Jan 2, 2026 · Jan 2, 2026 · Jan 2, 2026
@@ -1316,11 +1316,12 @@ comment "Board Settings"
 
 config BOARD_LOOPSPERMSEC
 	int "Delay loops per millisecond"
-	default 5000
+	default 0 if ARCH_SIM && ALARM_ARCH
 	---help---
 		Simple delay loops are used by some logic, especially during boot-up,
-		driver initialization.  These delay loops must be calibrated for each
-		board in order to assure accurate timing by the delay loops.
+		driver initialization. These delay loops must be calibrated for each
+		board in order to assure accurate timing by the delay loops. You can
+		do so with `calib_udelay` (EXAMPLES_CALIB_UDELAY).
 
 comment "Interrupt options"
 

@@ -13,6 +13,7 @@ CONFIG_ARCH_CHIP="fvp-v8r-aarch32"
 CONFIG_ARCH_CHIP_FVP_ARMV8R_AARCH32=y
 CONFIG_ARCH_CHIP_FVP_R52=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -33,4 +33,10 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 #endif /* __BOARDS_ARM_FVP_V8R_FVP_ARMV8R_INCLUDE_BOARD_H */
@@ -15,6 +15,7 @@ CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARMV7M_SYSTICK=y
 CONFIG_ARM_MPU=y
 CONFIG_ARM_MPU_EARLY_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILD_PROTECTED=y
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y

@@ -17,6 +17,7 @@ CONFIG_ARMV7M_SYSTICK=y
 CONFIG_ARM_MPU=y
 CONFIG_ARM_MPU_NREGIONS=1
 CONFIG_ARM_MPU_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y
 CONFIG_CMSDK_UART0_BASE=0x40004000

@@ -33,6 +33,12 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 #define MPS_SYSTICK_CLOCK   (32 * 1000 * 1000)
 
 /****************************************************************************

diff --git a/boards/arm/mps/mps2-an521/configs/nsh/defconfig b/boards/arm/mps/mps2-an521/configs/nsh/defconfig
@@ -18,6 +18,7 @@ CONFIG_ARMV8M_SYSTICK=y
 CONFIG_ARM_MPU=y
 CONFIG_ARM_MPU_NREGIONS=1
 CONFIG_ARM_MPU_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y
 CONFIG_CMSDK_UART0_BASE=0x50200000

@@ -33,6 +33,12 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 #define MPS_SYSTICK_CLOCK   (32 * 1000 * 1000)
 
 /****************************************************************************

@@ -76,6 +76,7 @@ CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_SYSTICK=y
 CONFIG_BOARDCTL_APP_SYMTAB=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILD_PIC=y
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y

@@ -95,6 +95,7 @@ CONFIG_ARCH_USE_SEPARATED_SECTION=y
 CONFIG_ARMV8M_SYSTICK=y
 CONFIG_BOARDCTL_APP_SYMTAB=y
 CONFIG_BOARDCTL_BOOT_IMAGE=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y
 CONFIG_CMSDK_UART0_BASE=0x49303000

diff --git a/boards/arm/mps/mps3-an547/configs/clang/defconfig b/boards/arm/mps/mps3-an547/configs/clang/defconfig
@@ -16,6 +16,7 @@ CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_SYSTICK=y
 CONFIG_ARM_TOOLCHAIN_CLANG=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_BUILTIN_COMPILER_RT=y
 CONFIG_CMSDK_UART0=y

diff --git a/boards/arm/mps/mps3-an547/configs/gcov/defconfig b/boards/arm/mps/mps3-an547/configs/gcov/defconfig
@@ -16,6 +16,7 @@ CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_SYSTICK=y
 CONFIG_ARM_TOOLCHAIN_CLANG=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y
 CONFIG_CMSDK_UART0_BASE=0x49303000

diff --git a/boards/arm/mps/mps3-an547/configs/gdbstub/defconfig b/boards/arm/mps/mps3-an547/configs/gdbstub/defconfig
@@ -15,6 +15,7 @@ CONFIG_ARCH_CHIP_MPS=y
 CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_SYSTICK=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BOARD_MEMORY_RANGE="{0,0x80000,0x5},{0x01000000,0x01200000,0x7},{0x22000000,0x22200000,0x7},{0x60000000,0xdffffff8,0x7},{0,0,0}"
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y

diff --git a/boards/arm/mps/mps3-an547/configs/knsh/defconfig b/boards/arm/mps/mps3-an547/configs/knsh/defconfig
@@ -17,6 +17,7 @@ CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_STACKCHECK_NONE=y
 CONFIG_ARMV8M_SYSTICK=y
 CONFIG_ARM_MPU=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILD_PROTECTED=y
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y

@@ -15,6 +15,7 @@ CONFIG_ARCH_CHIP_MPS=y
 CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_SYSTICK=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y
 CONFIG_CMSDK_UART0_BASE=0x49303000

diff --git a/boards/arm/mps/mps3-an547/configs/picostest/defconfig b/boards/arm/mps/mps3-an547/configs/picostest/defconfig
@@ -14,6 +14,7 @@ CONFIG_ARCH_CHIP_MPS=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV8M_SYSTICK=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_CMSDK_UART0=y
 CONFIG_CMSDK_UART0_BASE=0x49303000

@@ -33,6 +33,12 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 #define MPS_SYSTICK_CLOCK   (32 * 1000 * 1000)
 
 /****************************************************************************

@@ -19,6 +19,7 @@ CONFIG_ARCH_CHIP="phy62xx"
 CONFIG_ARCH_CHIP_PHY6222=y
 CONFIG_ARCH_CHIP_PHY62XX=y
 CONFIG_BOARD_LATE_INITIALIZE=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEFAULT_SMALL=y

@@ -40,6 +40,7 @@ CONFIG_ARCH_CHIP="phy62xx"
 CONFIG_ARCH_CHIP_PHY6222=y
 CONFIG_ARCH_CHIP_PHY62XX=y
 CONFIG_BOARD_LATE_INITIALIZE=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y

@@ -33,6 +33,16 @@
 #  include <stdint.h>
 #endif
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 #define HCLK_FREQUENCY    32000000ul       /* HSI48 for USB, only some STM32F0xx */
 
 #endif /* __BOARDS_ARM_PHY62XX_PHY6222_INCLUDE_BOARD_H */
@@ -19,6 +19,7 @@ CONFIG_ARCH_RAMVECTORS=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV7M_LIBM=y
 CONFIG_ARMV7M_MEMCPY=y
+CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_DEBUG_FEATURES=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_INIT_ENTRYPOINT="nsh_main"

@@ -19,6 +19,7 @@ CONFIG_ARCH_RAMVECTORS=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV7M_LIBM=y
 CONFIG_ARMV7M_MEMCPY=y
+CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_FEATURES=y
 CONFIG_DEBUG_SYMBOLS=y

diff --git a/boards/arm/stm32wl5/nucleo-wl55jc/configs/demo/defconfig b/boards/arm/stm32wl5/nucleo-wl55jc/configs/demo/defconfig
@@ -31,6 +31,7 @@ CONFIG_ARCH_CHIP="stm32wl5"
 CONFIG_ARCH_CHIP_STM32WL55JC_CPU1=y
 CONFIG_ARCH_CHIP_STM32WL5=y
 CONFIG_ARCH_IRQBUTTONS=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_EXAMPLES_BUTTONS=y
 CONFIG_EXAMPLES_LEDS=y

@@ -15,6 +15,7 @@ CONFIG_ARCH_CHIP="stm32wl5"
 CONFIG_ARCH_CHIP_STM32WL55JC_CPU1=y
 CONFIG_ARCH_CHIP_STM32WL5=y
 CONFIG_BOARD_LATE_INITIALIZE=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DRIVERS_VIDEO=y
 CONFIG_EXAMPLES_FB=y

diff --git a/boards/arm/stm32wl5/nucleo-wl55jc/configs/nsh/defconfig b/boards/arm/stm32wl5/nucleo-wl55jc/configs/nsh/defconfig
@@ -13,6 +13,7 @@ CONFIG_ARCH_BUTTONS=y
 CONFIG_ARCH_CHIP="stm32wl5"
 CONFIG_ARCH_CHIP_STM32WL55JC_CPU1=y
 CONFIG_ARCH_CHIP_STM32WL5=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_INIT_ENTRYNAME="main"
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_LPUART1_SERIAL_CONSOLE=y

@@ -32,6 +32,16 @@
 #  include <stdint.h>
 #endif
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 /* Clocking *****************************************************************/
 
 /* nucleo-wl55jc has installed 32Mhz HSE oscillator */
@@ -117,10 +127,6 @@
 #define BOARD_LPTIM2_FREQUENCY       STM32WL5_HCLK_FREQUENCY
 #define BOARD_LPTIM3_FREQUENCY       STM32WL5_HCLK_FREQUENCY
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
 /* Alternate function pin selections ****************************************/
 
 /* USART1:

@@ -17,6 +17,7 @@ CONFIG_ARCH_INTERRUPTSTACK=2048
 CONFIG_ARCH_IRQBUTTONS=y
 CONFIG_ARCH_LOWVECTORS=y
 CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_ELF=y
 CONFIG_FAT_LCNAMES=y

@@ -38,6 +38,12 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 /* Clocking *****************************************************************/
 
 /* The tms570ls31x-usb-kit has a 16 MHz external crystal. */

@@ -43,6 +43,7 @@ CONFIG_ARCH_USE_MMU=y
 CONFIG_ARM64_STRING_FUNCTION=y
 CONFIG_BOARDCTL_ROMDISK=y
 CONFIG_BOARD_LATE_INITIALIZE=y
+CONFIG_BOARD_LOOPSPERMSEC=201847
 CONFIG_BUILD_KERNEL=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_ASSERTIONS_EXPRESSION=y

@@ -14,6 +14,7 @@ CONFIG_ARCH_CHIP_FVP_ARMV8R=y
 CONFIG_ARCH_CHIP_FVP_R82=y
 CONFIG_ARCH_EARLY_PRINT=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -14,6 +14,7 @@ CONFIG_ARCH_CHIP_FVP_ARMV8R=y
 CONFIG_ARCH_CHIP_FVP_R82=y
 CONFIG_ARCH_EARLY_PRINT=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -15,6 +15,7 @@ CONFIG_ARCH_CHIP_FVP_R82=y
 CONFIG_ARCH_EARLY_PRINT=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
 CONFIG_ARM64_STRING_FUNCTION=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -17,6 +17,7 @@ CONFIG_ARCH_INTERRUPTSTACK=4096
 CONFIG_ARM64_SMP_BUSY_WAIT=y
 CONFIG_ARM64_SMP_BUSY_WAIT_FLAG_ADDR=0x60000
 CONFIG_ARM64_STRING_FUNCTION=y
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -33,4 +33,10 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 #endif /* __BOARDS_ARM64_FVP_V8R_FVP_ARMV8R_INCLUDE_BOARD_H */
@@ -14,6 +14,7 @@ CONFIG_ARCH_CHIP_IMX8=y
 CONFIG_ARCH_CHIP_IMX8_QUADMAX=y
 CONFIG_ARCH_EARLY_PRINT=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
+CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -20,8 +20,8 @@
  *
  ****************************************************************************/
 
-#ifndef __BOARDS_ARM64_IMX8_IMX8QM-MEK_INCLUDE_BOARD_H
-#define __BOARDS_ARM64_IMX8_IMX8QM-MEK_INCLUDE_BOARD_H
+#ifndef __BOARDS_ARM64_IMX8_IMX8QM_MEK_INCLUDE_BOARD_H
+#define __BOARDS_ARM64_IMX8_IMX8QM_MEK_INCLUDE_BOARD_H
 
 /****************************************************************************
  * Included Files
@@ -33,6 +33,12 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#warning "CONFIG_BOARD_LOOPSPERMSEC is set to 0 to prevent CI build errors." \
+"up_udelay() and similar delay functions will not work correctly." \
+"If you use this board, please determine an appropriate value using the" \
+"calib_udelay application in nuttx-apps. It would be appreciated if you" \
+"submit a patch with the new value to apache/nuttx and remove this warning."
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -58,4 +64,4 @@ extern "C"
 #endif
 
 #endif /* __ASSEMBLY__ */
-#endif /* __BOARDS_ARM64_IMX8_IMX8QM-MEK_INCLUDE_BOARD_H */
+#endif /* __BOARDS_ARM64_IMX8_IMX8QM_MEK_INCLUDE_BOARD_H */
@@ -13,6 +13,7 @@ CONFIG_ARCH_CHIP="qemu"
 CONFIG_ARCH_CHIP_QEMU=y
 CONFIG_ARCH_CHIP_QEMU_A53=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
+CONFIG_BOARD_LOOPSPERMSEC=354375
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

@@ -13,6 +13,7 @@ CONFIG_ARCH_CHIP="qemu"
 CONFIG_ARCH_CHIP_QEMU=y
 CONFIG_ARCH_CHIP_QEMU_A53=y
 CONFIG_ARCH_INTERRUPTSTACK=8192
+CONFIG_BOARD_LOOPSPERMSEC=354375
 CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y

diff --git a/boards/arm64/qemu/qemu-armv8a/configs/fastboot/defconfig b/boards/arm64/qemu/qemu-armv8a/configs/fastboot/defconfig
@@ -16,6 +16,7 @@ CONFIG_ARCH_CHIP_QEMU=y
 CONFIG_ARCH_CHIP_QEMU_A53=y
 CONFIG_ARCH_INTERRUPTSTACK=4096
 CONFIG_AUDIO=y
+CONFIG_BOARD_LOOPSPERMSEC=354375
 CONFIG_BUILTIN=y
 CONFIG_CODECS_HASH_MD5=y
 CONFIG_DEBUG_FULLOPT=y