[PATCH v4 0/7] Add rt-thread art-pi board support

[dillon.minfei at gmail.com]

From: dillon min <dillon.minfei at gmail.com>

These patches aim to adds u-boot support on art-pi board.

the board resources:
- stm32h750xbh6 128k flash, 1024k sram
- 32MiB sdram
- 16MiB spi flash
- 8MiB qspi flash
- onboard wifi, bt, fm

the detail board information can be found at:
https://art-pi.gitee.io/website/

---
changes in v4:
- sync with kernel side device tree submit
- use strlcpy in stm32_sdram.c
- update CONFIG_BOOTARGS, remove rdinit=/linuxrc, to use kernel's devtmpfs
- remove unused st,stm32h750-pinctrl from patch v3

changes in v3:
two mirror changes in [PATCH v3 2/6], others same to version 2
- remove "for STMicroelectronics." from arch/arm/dts/stm32h750-pinctrl.dtsi
- correct misspelling parameters
you can found detail patch v2 information at link:
https://patchwork.ozlabs.org/project/uboot/list/?series=236009

changes in v2:
- fix wrong author/date in previous submit
- sync with kernel device tree files
- add st,stm32h750-pinctrl in doc and pinctrl driver

*** BLURB HERE ***

dillon min (7):
  ARM: dts: stm32: split sdram pin & timing parameter into specific
    board dts
  ARM: dts: stm32: introduce stm32h7-pinctrl.dtsi to support stm32h750
  ARM: dts: stm32: add new instances for stm32h743 MCU
  ARM: dts: stm32: fix i2c node typo in stm32h743, update dmamux1
    register
  ARM: dts: stm32: add support for art-pi board based on stm32h750xbh6
  ram: stm32: fix strsep failed on read only memory
  board: Add rt-thread art-pi board support

 arch/arm/dts/Makefile                        |   3 +-
 arch/arm/dts/stm32h7-pinctrl.dtsi            | 274 ++++++++++++++++++++++++
 arch/arm/dts/stm32h7-u-boot.dtsi             | 100 +--------
 arch/arm/dts/stm32h743-pinctrl.dtsi          | 306 ---------------------------
 arch/arm/dts/stm32h743.dtsi                  | 178 +++++++++++++++-
 arch/arm/dts/stm32h743i-disco-u-boot.dtsi    |  98 +++++++++
 arch/arm/dts/stm32h743i-disco.dts            |   2 +-
 arch/arm/dts/stm32h743i-eval-u-boot.dtsi     |  98 +++++++++
 arch/arm/dts/stm32h743i-eval.dts             |   2 +-
 arch/arm/dts/stm32h750.dtsi                  |   5 +
 arch/arm/dts/stm32h750i-art-pi-u-boot.dtsi   |  81 +++++++
 arch/arm/dts/stm32h750i-art-pi.dts           | 188 ++++++++++++++++
 arch/arm/mach-stm32/stm32h7/Kconfig          |   4 +
 board/st/stm32h750-art-pi/Kconfig            |  19 ++
 board/st/stm32h750-art-pi/MAINTAINERS        |   7 +
 board/st/stm32h750-art-pi/Makefile           |   6 +
 board/st/stm32h750-art-pi/stm32h750-art-pi.c |  58 +++++
 configs/stm32h750-art-pi_defconfig           |  51 +++++
 drivers/ram/stm32_sdram.c                    |   3 +
 include/configs/stm32h750-art-pi.h           |  48 +++++
 include/dt-bindings/memory/stm32-sdram.h     |   2 +
 21 files changed, 1126 insertions(+), 407 deletions(-)
 create mode 100644 arch/arm/dts/stm32h7-pinctrl.dtsi
 delete mode 100644 arch/arm/dts/stm32h743-pinctrl.dtsi
 create mode 100644 arch/arm/dts/stm32h750.dtsi
 create mode 100644 arch/arm/dts/stm32h750i-art-pi-u-boot.dtsi
 create mode 100644 arch/arm/dts/stm32h750i-art-pi.dts
 create mode 100644 board/st/stm32h750-art-pi/Kconfig
 create mode 100644 board/st/stm32h750-art-pi/MAINTAINERS
 create mode 100644 board/st/stm32h750-art-pi/Makefile
 create mode 100644 board/st/stm32h750-art-pi/stm32h750-art-pi.c
 create mode 100644 configs/stm32h750-art-pi_defconfig
 create mode 100644 include/configs/stm32h750-art-pi.h

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2.7.4