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Mon, 18 Dec 2017 16:18:08 +0100 Received: from lmecxl0923.lme.st.com (10.48.0.237) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.352.0; Mon, 18 Dec 2017 16:18:08 +0100 From: Ludovic Barre To: Russell King , Rob Herring , Linus Walleij , Arnd Bergmann Subject: [PATCH V2 3/9] ARM: stm32: prepare stm32 family to welcome armv7 architecture Date: Mon, 18 Dec 2017 16:17:46 +0100 Message-ID: <1513610272-7824-4-git-send-email-ludovic.Barre@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513610272-7824-1-git-send-email-ludovic.Barre@st.com> References: <1513610272-7824-1-git-send-email-ludovic.Barre@st.com> MIME-Version: 1.0 X-Originating-IP: [10.48.0.237] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-12-18_11:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171218_071850_224097_DD56A4E6 X-CRM114-Status: GOOD ( 12.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Alexandre Torgue , linux-kernel@vger.kernel.org, Ludovic Barre , Maxime Coquelin , Gerald Baeza , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ludovic Barre 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 --- Documentation/arm/stm32/overview.rst | 21 +++++++++-------- arch/arm/mach-stm32/Kconfig | 27 ++++++++++++---------- arch/arm/mach-stm32/Makefile | 2 +- arch/arm/mach-stm32/{board-dt.c => board-mcu-dt.c} | 0 4 files changed, 28 insertions(+), 22 deletions(-) rename arch/arm/mach-stm32/{board-dt.c => board-mcu-dt.c} (100%) diff --git a/Documentation/arm/stm32/overview.rst b/Documentation/arm/stm32/overview.rst index 6be6059..3da6a8e 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 ------ @@ -22,10 +23,12 @@ Layout All the files for multiple machine families are located in the platform code contained in arch/arm/mach-stm32 -There is a generic board board-dt.c in the mach folder which support -Flattened Device Tree, which means, it works with any compatible board with -Device Trees. +There are generic boards board-mcu-dt.c and board-mpu-dt.c files in the mach +folder which support Flattened Device Tree, which means, they work with any +compatible board with Device Trees. :Authors: -Maxime Coquelin +- Maxime Coquelin +- Ludovic Barre +- Gerald Baeza diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig index 0d1889b..e0f744b 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 + config MACH_STM32F429 - bool "STMicrolectronics STM32F429" - depends on ARCH_STM32 + bool "STMicroelectronics STM32F429" + depends on ARM_SINGLE_ARMV7M default y config MACH_STM32F469 - bool "STMicrolectronics STM32F469" - depends on ARCH_STM32 + bool "STMicroelectronics STM32F469" + depends on ARM_SINGLE_ARMV7M default y config MACH_STM32F746 - bool "STMicrolectronics STM32F746" - depends on ARCH_STM32 + bool "STMicroelectronics STM32F746" + depends on ARM_SINGLE_ARMV7M default y config MACH_STM32H743 - bool "STMicrolectronics STM32H743" - depends on ARCH_STM32 + bool "STMicroelectronics STM32H743" + depends on ARM_SINGLE_ARMV7M default y + +endif diff --git a/arch/arm/mach-stm32/Makefile b/arch/arm/mach-stm32/Makefile index bd0b7b5..5940af1 100644 --- a/arch/arm/mach-stm32/Makefile +++ b/arch/arm/mach-stm32/Makefile @@ -1 +1 @@ -obj-y += board-dt.o +obj-$(CONFIG_ARM_SINGLE_ARMV7M) += board-mcu-dt.o diff --git a/arch/arm/mach-stm32/board-dt.c b/arch/arm/mach-stm32/board-mcu-dt.c similarity index 100% rename from arch/arm/mach-stm32/board-dt.c rename to arch/arm/mach-stm32/board-mcu-dt.c