This series enable DMA on several STM32 MCU based on cortex-M7. To make it possible, a dedicated dma pool memory area has to be created. This patchset activate also ARM_MPU flag which will configure MPU (Memory Protection Unit) according to devicetree information (mem and dma-pool). Note that on cortex-M7 DMA has to use a NO cache-able memory region. v2: -select ARM_MPU in mach-stm32 Kconfig instead of add it in stm32 defconfig -Remove XIP configuration from stm32_defconfig: ARM_MPU flag imposes XIP image to be aligned on 1MB. It is currently not the case. I had choice to either modify current XIP start address to be aligned on 1MB or to remove global configuration. I make choice to remove XIP configuration. Indeed, SD card support has been recently added for most of STM32 MCU boards (except for stm32f429-disco). As kernel is growing up for stm32 it will be more and more difficult to flash it in embeded flash (max size: 2MB). -fix typo in commit message Regards Alex Alexandre Torgue (4): ARM: dts: stm32: add DMA memory pool on MCU which embed a cortex-M7 ARM: configs: stm32: remove XIP configuration ARM: stm32: Select ARM_MPU for cortex-M7 machines ARM: dts: stm32: enable dma on MCU which embed a cortex-M7 arch/arm/boot/dts/stm32746g-eval.dts | 21 +++++++++++++++++++++ arch/arm/boot/dts/stm32f769-disco.dts | 21 +++++++++++++++++++++ arch/arm/boot/dts/stm32h743i-disco.dts | 21 +++++++++++++++++++++ arch/arm/boot/dts/stm32h743i-eval.dts | 21 +++++++++++++++++++++ arch/arm/configs/stm32_defconfig | 2 -- arch/arm/mach-stm32/Kconfig | 3 +++ 6 files changed, 87 insertions(+), 2 deletions(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
