This patchset adds a very basic initial support for TWR-K70F120M development kit which is based on ARM Cortex-M4 Freescale Kinetis K70 SoC. I've found this a very lovely piece of equipment which allowed me to explore mysterious world of noMMU Linux. Therefore I think it deserves proper support from upstream Linux kernel side. I based my work on K70 Sub-Family Reference Manual Rev. 3, K70P256M150SF3RM.pdf and commits published on Emcraft git repo: https://github.com/EmcraftSystems/linux-emcraft.git The BSP published by Emcraft is based on Linux 2.6.33, does not use OF Device Tree and implements its own NVIC, clock source, IOMUX and DMA controller support routines. I wrote clear remarks whenever I'd used parts of the code from their repository. I decided to make use of recent additions to linux-next whenever it was suitable, i.e.: o all devices are configured in .dts files o for NVIC I used in-tree driver o for systick I used recently added arm,armv7m-systick driver o for clock sources I implemented drivers that in shape are similar to efm32gg drivers (another ARM Cortex-M4 based platform - already supported by upstream kernel so I could use it as a reference on how things should possibly be done) o for IOMUX I implemented very simplified pinctrl OF-friendly driver (which is sufficient for now, at least to configure UART pins) o for DMA I extended existing Freescale eDMA driver o for UART I also extended existing Freescale lpuart driver You may find the first three patches a bit controversial. They intrude into sensitive parts of ARM support in kernel tree. You may not like it, but that's how it started to work for me. I tried to minimize the impact as much as I could, however any better proposals are more than welcome. Note that U-boot on my TWR-K70F120M is a bit modest and does not support DTBs. Therefore the only option for having bootable uImage is zImage with DTB attached at the end. In short it can be done like this: make uImage (this creates normal uImage along with zImage) make kinetis-twr-k70f120m.dtb cat arch/arm/boot/zImage arch/arm/boot/dts/kinetis-twr-k70f120m.dtb >Image mkimage -A arm -O linux -C none -T kernel -a 0x08008000 -e 0x08008001 \ -n 'Linux-next-with-dtb' -d Image uImage I'm booting this image over local network using TFTP. The userspace resides in initramfs and consists of busybox and a few very basic command line tools. This initial support is just a beginning. My TWR-K70F120M is equipped with many interesting features to which many drivers can be written. During my work I was using Segger J-Link PRO JTAG which works nicely with this development board - I can't imagine myself doing all this stuff without it. Paul Osmialowski (9): arm: select different compiler flags for ARM CortexM3 arm: do not place huge encoder tables on stack when it is too small arm: add call to CPU idle quirks handler arm: allow copying of vector table to internal SRAM memory arm: twr-k70f120m: basic support for Kinetis TWR-K70F120M arm: twr-k70f120m: clock source drivers for Kinetis SoC arm: twr-k70f120m: IOMUX driver for Kinetis SoC arm: twr-k70f120m: extend Freescale eDMA driver with ability to support Kinetis SoC arm: twr-k70f120m: extend Freescale lpuart driver with ability to support Kinetis SoC Documentation/devicetree/bindings/arm/fsl.txt | 6 + .../devicetree/bindings/clock/kinetis-clock.txt | 25 + Documentation/devicetree/bindings/dma/fsl-edma.txt | 38 +- .../bindings/pinctrl/fsl,kinetis-pinctrl.txt | 31 ++ .../devicetree/bindings/serial/fsl-lpuart.txt | 6 +- .../bindings/timer/fsl,kinetis-pit-timer.txt | 18 + arch/arm/Kconfig | 29 +- arch/arm/Kconfig-nommu | 16 + arch/arm/Makefile | 2 + arch/arm/boot/dts/kinetis-twr-k70f120m.dts | 43 ++ arch/arm/boot/dts/kinetis.dtsi | 215 +++++++++ arch/arm/kernel/entry-v7m.S | 3 + arch/arm/kernel/process.c | 7 + arch/arm/mach-kinetis/Kconfig | 15 + arch/arm/mach-kinetis/Makefile | 5 + arch/arm/mach-kinetis/Makefile.boot | 3 + arch/arm/mach-kinetis/include/mach/idle.h | 33 ++ arch/arm/mach-kinetis/include/mach/kinetis.h | 170 +++++++ arch/arm/mach-kinetis/include/mach/memory.h | 61 +++ arch/arm/mach-kinetis/include/mach/power.h | 83 ++++ arch/arm/mach-kinetis/kinetis_platform.c | 61 +++ arch/arm/mm/Kconfig | 12 +- arch/arm/mm/proc-v7m.S | 11 + arch/arm/tools/mach-types | 1 + drivers/clk/Makefile | 1 + drivers/clk/clk-kinetis.c | 297 ++++++++++++ drivers/clocksource/Kconfig | 5 + drivers/clocksource/Makefile | 1 + drivers/clocksource/timer-kinetis.c | 294 ++++++++++++ drivers/dma/fsl-edma.c | 81 +++- drivers/pinctrl/freescale/Kconfig | 8 + drivers/pinctrl/freescale/Makefile | 1 + drivers/pinctrl/freescale/pinctrl-kinetis.c | 529 +++++++++++++++++++++ drivers/tty/serial/fsl_lpuart.c | 90 +++- include/dt-bindings/clock/kinetis-mcg.h | 25 + lib/zlib_inflate/inflate.c | 5 + 36 files changed, 2210 insertions(+), 21 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/kinetis-clock.txt create mode 100644 Documentation/devicetree/bindings/pinctrl/fsl,kinetis-pinctrl.txt create mode 100644 Documentation/devicetree/bindings/timer/fsl,kinetis-pit-timer.txt create mode 100644 arch/arm/boot/dts/kinetis-twr-k70f120m.dts create mode 100644 arch/arm/boot/dts/kinetis.dtsi create mode 100644 arch/arm/mach-kinetis/Kconfig create mode 100644 arch/arm/mach-kinetis/Makefile create mode 100644 arch/arm/mach-kinetis/Makefile.boot create mode 100644 arch/arm/mach-kinetis/include/mach/idle.h create mode 100644 arch/arm/mach-kinetis/include/mach/kinetis.h create mode 100644 arch/arm/mach-kinetis/include/mach/memory.h create mode 100644 arch/arm/mach-kinetis/include/mach/power.h create mode 100644 arch/arm/mach-kinetis/kinetis_platform.c create mode 100644 drivers/clk/clk-kinetis.c create mode 100644 drivers/clocksource/timer-kinetis.c create mode 100644 drivers/pinctrl/freescale/pinctrl-kinetis.c create mode 100644 include/dt-bindings/clock/kinetis-mcg.h -- 2.3.6 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
