[RFC,v2,00/13] arm: add support for SoC S5P4418

This patch adds support for SAMSUNG's/NEXELL's ARM Cortex-A9 based
S5P4418 SoC, especially FriendlyARM's NanoPi2 and NanoPC-T2 boards.
It is based on the following FriendlyARM's U-Boot version:
https://github.com/friendlyarm/u-boot/tree/nanopi2-v2016.01.

Main changes in relation to nanopi2-v2016.01:
- Cosmetic changes due to patman warnings/errors.
- MMC and Video drivers changed to DM.
- Configs reworked (e.g. "CONFIG_..." moved from s5p4418_nanopi2.h
  to s5p4418_nanopi2_defconfig)
- SPL related files are not included.
- MACH_TYPE_S5P4418 is not defined/used anymore.
- arch/arm/mach-nexell/include/mach/boot0.h added to generate the NSIH
  (Nexell System Information Header), substitudes tools/nexell.
- board/s5p4418/ renamed to board/friendlyarm/
- Only the NanoPi2 and NanoPC-T2 boards are supported yet because I
  do only have the NanoPC-T2 board to test the code (this board uses
  the NanoPi2 code).
- USB is not supported yet.

The patch-series has been checked by buildman (all arm boards and two
m68k boards = M5235EVB):
  buildman --step 0 -b master arm
  buildman --step 0 -b master M5235EVB
There have been no new warnings or errors.

Changes in v2:
- arch/arm/mach-nexell/serial.c removed because this is for the UARTs
  of the S5P6818 SoC which is not supported yet. S5P4418 UARTs are
  different, here the (existing) PL011-code is used.
- line '... += spl/' in in arch/arm/mach-nexell/Makefile deleted, this
  change has already been stated in the commit message but was missing
  nethertheless.
- commit "i2c: mmc: add nexell driver (gpio, i2c, mmc, pwm)" splitted
  into separate commits for gpio, i2c, mmc, pwm.
- cosmetic: line "obj-$(CONFIG_NX_GPIO) += nx_gpio.o" in
  drivers/gpio/Makefile moved up.
- several Bugfixes in nx_i2c.c.
- the i2c-driver has been for s5p6818 only. Code extended approriately
  in order s5p4418 is also working.
- "probe_chip" added to the i2c-driver.
- doc/device-tree-bindings/i2c/nx_i2c.txt added.
- Since drivers/pwm/pwm-nexell.c is an adapted version of
  s5p-common/pwm.c an appropriately changed version of s5p-common/pwm.c
  is used now. Therefore arch/arm/mach-s5pc1xx/include/mach/pwm.h
  copied to arch/arm/mach-nexell/include/mach and s5p-common/Makefile
  changed appropriately.
- i2c: "nexell,s5pxx18-i2c"-driver is used now instead of "i2c-gpio".
  i2c0 and i2c1 added. I.e. dts files changed appropriately.
- dts: gmac-, ehci- and dwc2otg-entries removed because the appropriate
  functionality is not supported yet.
- s5p4418-pinctrl.dtsi removed because there is no pinctrl-driver
  available.
- "obj-$(CONFIG_ARCH_NEXELL) += s5p-common/" added to
  arch/arm/cpu/armv7/Makefile since s5p-common/pwm.c is used now instead
  of drivers/pwm/pwm-nexell.c.
- cosmetic: additional GPL license text removed, SPDX-License-Identifier
  is enough. Furthermore file path removed (two files).
- USB related configs removed because USB is not supported yet.
- CONFIG_CMD_MEMTEST moved from s5p4418_nanopi2.h to
  s5p4418_nanopi2_defconfig.
- MAINTAINERS: "F: drivers/pwm/pwm-nexell*" deleted because
  arch/arm/cpu/armv7/s5p-common/pwm.c is used now. Furthermore double
  line "F: drivers/video/nexell/" deleted.

Stefan Bosch (13):
  arm: add mach-nexell (header files)
  arm: add mach-nexell (all files except header files)
  gpio: add nexell driver
  i2c: add nexell driver
  mmc: add nexell driver
  pwm: add driver for nexell
  video: add nexell video driver (soc: displaytop)
  video: add nexell video driver (soc: mlc, mipi)
  video: add nexell video driver (soc: lvds, hdmi)
  video: add nexell video driver (soc: dpc, makefile)
  video: add nexell video driver (display/video driver)
  arm: add support for SoC s5p4418 (cpu) / nanopi2 board
  arm: add (default) config for nanopi2 board

 MAINTAINERS                                        |   16 +
 arch/arm/Kconfig                                   |    7 +
 arch/arm/Makefile                                  |    1 +
 arch/arm/cpu/armv7/Makefile                        |    2 +
 arch/arm/cpu/armv7/s5p-common/Makefile             |    4 +
 arch/arm/cpu/armv7/s5p-common/pwm.c                |   56 +
 arch/arm/cpu/armv7/s5p4418/Makefile                |    6 +
 arch/arm/cpu/armv7/s5p4418/cpu.c                   |  120 ++
 arch/arm/dts/Makefile                              |    3 +
 arch/arm/dts/s5p4418-nanopi2.dts                   |  108 ++
 arch/arm/dts/s5p4418.dtsi                          |  148 ++
 arch/arm/mach-nexell/Kconfig                       |   67 +
 arch/arm/mach-nexell/Makefile                      |   13 +
 arch/arm/mach-nexell/clock.c                       |  869 +++++++++
 arch/arm/mach-nexell/cmd_boot_linux.c              |  145 ++
 arch/arm/mach-nexell/config.mk                     |   11 +
 arch/arm/mach-nexell/include/mach/boot0.h          |   40 +
 arch/arm/mach-nexell/include/mach/clk.h            |   24 +
 arch/arm/mach-nexell/include/mach/display.h        |  273 +++
 arch/arm/mach-nexell/include/mach/display_dev.h    |   37 +
 arch/arm/mach-nexell/include/mach/ehci.h           |  106 ++
 arch/arm/mach-nexell/include/mach/gpio.h           |   17 +
 arch/arm/mach-nexell/include/mach/mipi_display.h   |  215 +++
 arch/arm/mach-nexell/include/mach/nexell.h         |  352 ++++
 arch/arm/mach-nexell/include/mach/nx_gpio.h        |  103 ++
 arch/arm/mach-nexell/include/mach/pwm.h            |   54 +
 arch/arm/mach-nexell/include/mach/reset.h          |   19 +
 arch/arm/mach-nexell/include/mach/sec_reg.h        |   15 +
 arch/arm/mach-nexell/include/mach/tieoff.h         |  423 +++++
 arch/arm/mach-nexell/nx_gpio.c                     |  352 ++++
 arch/arm/mach-nexell/nx_sec_reg.c                  |   82 +
 arch/arm/mach-nexell/reg-call.S                    |   23 +
 arch/arm/mach-nexell/reset.c                       |   33 +
 arch/arm/mach-nexell/tieoff.c                      |  109 ++
 arch/arm/mach-nexell/timer.c                       |  297 ++++
 board/friendlyarm/Kconfig                          |   39 +
 board/friendlyarm/nanopi2/Kconfig                  |   12 +
 board/friendlyarm/nanopi2/MAINTAINERS              |    7 +
 board/friendlyarm/nanopi2/Makefile                 |    6 +
 board/friendlyarm/nanopi2/board.c                  |  567 ++++++
 board/friendlyarm/nanopi2/hwrev.c                  |  108 ++
 board/friendlyarm/nanopi2/hwrev.h                  |   15 +
 board/friendlyarm/nanopi2/lcds.c                   |  697 ++++++++
 board/friendlyarm/nanopi2/nxp-fb.h                 |   94 +
 board/friendlyarm/nanopi2/onewire.c                |  309 ++++
 board/friendlyarm/nanopi2/onewire.h                |   15 +
 configs/s5p4418_nanopi2_defconfig                  |  148 ++
 doc/README.s5p4418                                 |   63 +
 doc/device-tree-bindings/i2c/nx_i2c.txt            |   28 +
 drivers/gpio/Kconfig                               |    9 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/nx_gpio.c                             |  252 +++
 drivers/i2c/Kconfig                                |    9 +
 drivers/i2c/Makefile                               |    1 +
 drivers/i2c/nx_i2c.c                               |  649 +++++++
 drivers/mmc/Kconfig                                |    6 +
 drivers/mmc/Makefile                               |    1 +
 drivers/mmc/nexell_dw_mmc_dm.c                     |  350 ++++
 drivers/video/Kconfig                              |   10 +
 drivers/video/Makefile                             |    1 +
 drivers/video/nexell/Kconfig                       |   27 +
 drivers/video/nexell/Makefile                      |   12 +
 drivers/video/nexell/s5pxx18_dp.c                  |  338 ++++
 drivers/video/nexell/s5pxx18_dp_hdmi.c             |  543 ++++++
 drivers/video/nexell/s5pxx18_dp_lvds.c             |  274 +++
 drivers/video/nexell/s5pxx18_dp_mipi.c             |  677 +++++++
 drivers/video/nexell/s5pxx18_dp_rgb.c              |   69 +
 drivers/video/nexell/soc/Makefile                  |   11 +
 drivers/video/nexell/soc/s5pxx18_soc_disptop.c     |  185 ++
 drivers/video/nexell/soc/s5pxx18_soc_disptop.h     |  385 ++++
 drivers/video/nexell/soc/s5pxx18_soc_disptop_clk.c |  309 ++++
 drivers/video/nexell/soc/s5pxx18_soc_disptop_clk.h |   59 +
 drivers/video/nexell/soc/s5pxx18_soc_disptype.h    |   23 +
 drivers/video/nexell/soc/s5pxx18_soc_dpc.c         | 1569 +++++++++++++++++
 drivers/video/nexell/soc/s5pxx18_soc_dpc.h         |  444 +++++
 drivers/video/nexell/soc/s5pxx18_soc_hdmi.c        |   50 +
 drivers/video/nexell/soc/s5pxx18_soc_hdmi.h        |  488 +++++
 drivers/video/nexell/soc/s5pxx18_soc_lvds.c        |  278 +++
 drivers/video/nexell/soc/s5pxx18_soc_lvds.h        |   83 +
 drivers/video/nexell/soc/s5pxx18_soc_mipi.c        |  580 ++++++
 drivers/video/nexell/soc/s5pxx18_soc_mipi.h        |  291 +++
 drivers/video/nexell/soc/s5pxx18_soc_mlc.c         | 1861 ++++++++++++++++++++
 drivers/video/nexell/soc/s5pxx18_soc_mlc.h         |  429 +++++
 drivers/video/nexell_display.c                     |  665 +++++++
 include/configs/s5p4418_nanopi2.h                  |  265 +++
 85 files changed, 17462 insertions(+)
 create mode 100644 arch/arm/cpu/armv7/s5p4418/Makefile
 create mode 100644 arch/arm/cpu/armv7/s5p4418/cpu.c
 create mode 100644 arch/arm/dts/s5p4418-nanopi2.dts
 create mode 100644 arch/arm/dts/s5p4418.dtsi
 create mode 100644 arch/arm/mach-nexell/Kconfig
 create mode 100644 arch/arm/mach-nexell/Makefile
 create mode 100644 arch/arm/mach-nexell/clock.c
 create mode 100644 arch/arm/mach-nexell/cmd_boot_linux.c
 create mode 100644 arch/arm/mach-nexell/config.mk
 create mode 100644 arch/arm/mach-nexell/include/mach/boot0.h
 create mode 100644 arch/arm/mach-nexell/include/mach/clk.h
 create mode 100644 arch/arm/mach-nexell/include/mach/display.h
 create mode 100644 arch/arm/mach-nexell/include/mach/display_dev.h
 create mode 100644 arch/arm/mach-nexell/include/mach/ehci.h
 create mode 100644 arch/arm/mach-nexell/include/mach/gpio.h
 create mode 100644 arch/arm/mach-nexell/include/mach/mipi_display.h
 create mode 100644 arch/arm/mach-nexell/include/mach/nexell.h
 create mode 100644 arch/arm/mach-nexell/include/mach/nx_gpio.h
 create mode 100644 arch/arm/mach-nexell/include/mach/pwm.h
 create mode 100644 arch/arm/mach-nexell/include/mach/reset.h
 create mode 100644 arch/arm/mach-nexell/include/mach/sec_reg.h
 create mode 100644 arch/arm/mach-nexell/include/mach/tieoff.h
 create mode 100644 arch/arm/mach-nexell/nx_gpio.c
 create mode 100644 arch/arm/mach-nexell/nx_sec_reg.c
 create mode 100644 arch/arm/mach-nexell/reg-call.S
 create mode 100644 arch/arm/mach-nexell/reset.c
 create mode 100644 arch/arm/mach-nexell/tieoff.c
 create mode 100644 arch/arm/mach-nexell/timer.c
 create mode 100644 board/friendlyarm/Kconfig
 create mode 100644 board/friendlyarm/nanopi2/Kconfig
 create mode 100644 board/friendlyarm/nanopi2/MAINTAINERS
 create mode 100644 board/friendlyarm/nanopi2/Makefile
 create mode 100644 board/friendlyarm/nanopi2/board.c
 create mode 100644 board/friendlyarm/nanopi2/hwrev.c
 create mode 100644 board/friendlyarm/nanopi2/hwrev.h
 create mode 100644 board/friendlyarm/nanopi2/lcds.c
 create mode 100644 board/friendlyarm/nanopi2/nxp-fb.h
 create mode 100644 board/friendlyarm/nanopi2/onewire.c
 create mode 100644 board/friendlyarm/nanopi2/onewire.h
 create mode 100644 configs/s5p4418_nanopi2_defconfig
 create mode 100644 doc/README.s5p4418
 create mode 100644 doc/device-tree-bindings/i2c/nx_i2c.txt
 create mode 100644 drivers/gpio/nx_gpio.c
 create mode 100644 drivers/i2c/nx_i2c.c
 create mode 100644 drivers/mmc/nexell_dw_mmc_dm.c
 create mode 100644 drivers/video/nexell/Kconfig
 create mode 100644 drivers/video/nexell/Makefile
 create mode 100644 drivers/video/nexell/s5pxx18_dp.c
 create mode 100644 drivers/video/nexell/s5pxx18_dp_hdmi.c
 create mode 100644 drivers/video/nexell/s5pxx18_dp_lvds.c
 create mode 100644 drivers/video/nexell/s5pxx18_dp_mipi.c
 create mode 100644 drivers/video/nexell/s5pxx18_dp_rgb.c
 create mode 100644 drivers/video/nexell/soc/Makefile
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_disptop.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_disptop.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_disptop_clk.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_disptop_clk.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_disptype.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_dpc.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_dpc.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_hdmi.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_hdmi.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_lvds.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_lvds.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_mipi.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_mipi.h
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_mlc.c
 create mode 100644 drivers/video/nexell/soc/s5pxx18_soc_mlc.h
 create mode 100644 drivers/video/nexell_display.c
 create mode 100644 include/configs/s5p4418_nanopi2.h