From: Ludovic Barre <ludovic.ba...@st.com> This patch prepares the STM32 machine for the integration of Cortex-A based microprocessor (MPU), on top of the existing Cortex-M microcontroller family (MCU). Since both MCUs and MPUs are sharing common hardware blocks we can keep using ARCH_STM32 flag for most of them. If a hardware block is specific to one family we can use either ARM_SINGLE_ARMV7M or ARCH_MULTI_V7 flag.
Signed-off-by: Ludovic Barre <ludovic.ba...@st.com> --- Documentation/arm/stm32/overview.rst | 15 +++++++++------ arch/arm/mach-stm32/Kconfig | 27 +++++++++++++++------------ arch/arm/mach-stm32/board-dt.c | 4 +--- 3 files changed, 25 insertions(+), 21 deletions(-) diff --git a/Documentation/arm/stm32/overview.rst b/Documentation/arm/stm32/overview.rst index 6be6059..85cfc84 100644 --- a/Documentation/arm/stm32/overview.rst +++ b/Documentation/arm/stm32/overview.rst @@ -5,16 +5,17 @@ STM32 ARM Linux Overview Introduction ------------ -The STMicroelectronics family of Cortex-M based MCUs are supported by the -'STM32' platform of ARM Linux. Currently only the STM32F429 (Cortex-M4) -and STM32F746 (Cortex-M7) are supported. +The STMicroelectronics STM32 family of Cortex-A microprocessors (MPUs) and +Cortex-M microcontrollers (MCUs) are supported by the 'STM32' platform of +ARM Linux. Configuration ------------- -A generic configuration is provided for STM32 family, and can be used as the -default by +For MCUs, use the provided default configuration: make stm32_defconfig +For MPUs, use multi_v7 configuration: + make multi_v7_defconfig Layout ------ @@ -28,4 +29,6 @@ Device Trees. :Authors: -Maxime Coquelin <mcoquelin.st...@gmail.com> +- Maxime Coquelin <mcoquelin.st...@gmail.com> +- Ludovic Barre <ludovic.ba...@st.com> +- Gerald Baeza <gerald.ba...@st.com> diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig index 0d1889b..fb4b8b8 100644 --- a/arch/arm/mach-stm32/Kconfig +++ b/arch/arm/mach-stm32/Kconfig @@ -1,8 +1,7 @@ -config ARCH_STM32 - bool "STMicrolectronics STM32" - depends on ARM_SINGLE_ARMV7M +menuconfig ARCH_STM32 + bool "STMicroelectronics STM32 family" if ARM_SINGLE_ARMV7M || ARCH_MULTI_V7 + select ARMV7M_SYSTICK if ARM_SINGLE_ARMV7M select ARCH_HAS_RESET_CONTROLLER - select ARMV7M_SYSTICK select CLKSRC_STM32 select PINCTRL select RESET_CONTROLLER @@ -10,22 +9,26 @@ config ARCH_STM32 help Support for STMicroelectronics STM32 processors. +if ARCH_STM32 + +if ARM_SINGLE_ARMV7M + config MACH_STM32F429 - bool "STMicrolectronics STM32F429" - depends on ARCH_STM32 + bool "STMicroelectronics STM32F429" default y config MACH_STM32F469 - bool "STMicrolectronics STM32F469" - depends on ARCH_STM32 + bool "STMicroelectronics STM32F469" default y config MACH_STM32F746 - bool "STMicrolectronics STM32F746" - depends on ARCH_STM32 + bool "STMicroelectronics STM32F746" default y config MACH_STM32H743 - bool "STMicrolectronics STM32H743" - depends on ARCH_STM32 + bool "STMicroelectronics STM32H743" default y + +endif # ARMv7-M + +endif diff --git a/arch/arm/mach-stm32/board-dt.c b/arch/arm/mach-stm32/board-dt.c index e918686..4a258eb 100644 --- a/arch/arm/mach-stm32/board-dt.c +++ b/arch/arm/mach-stm32/board-dt.c @@ -1,11 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) Maxime Coquelin 2015 * Author: Maxime Coquelin <mcoquelin.st...@gmail.com> - * License terms: GNU General Public License (GPL), version 2 */ #include <linux/kernel.h> -#include <asm/v7m.h> #include <asm/mach/arch.h> static const char *const stm32_compat[] __initconst = { @@ -18,5 +17,4 @@ static const char *const stm32_compat[] __initconst = { DT_MACHINE_START(STM32DT, "STM32 (Device Tree Support)") .dt_compat = stm32_compat, - .restart = armv7m_restart, MACHINE_END -- 2.7.4