[v3,00/14] 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.
- pinctrl-driver/dt is used for mmc and i2c now instead of configuring
  the I/O-pins in the drivers.
- '#ifdef CONFIG...' changed to 'if (IS_ENABLED(CONFIG...))' where
  possible (and similar).
- livetree API (dev_read_...) is used instead of fdt one (fdt...).

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 v3:
- arch/arm/mach-nexell/Kconfig: "NEXELL_COMMON" removed, has not been
  used at all. NEXELL_ARMV7_COMMON and NEXELL_ARMV8_COMMON removed,
  has been used only in the Kconfig at ARCH_S5P4418 and ARCH_S5P6818.
  Used "select ..."-statements moved appropriately.
  Missing helps added.
- arch/arm/mach-nexell/timer.c: '#include <log.h>' inserted because
  it has been removed from common.h.
- '#ifdef...' changed to 'if (IS_ENABLED(CONFIG...))' where possible
  because of appropriate warnings of patman.
- Changed to livetree API as proposed by patman:
  fdtdec_get_int() --> dev_read_s32_default()
  fdt_getprop() --> dev_read_string()
- pinctrl-driver/dt is used now instead of configuring the i2c I/O-pins
  in the i2c-driver.
- drivers/i2c/nx_i2c.c: '#include <log.h>' inserted because it has been
  removed from common.h.
- Changed to livetree API as proposed by patman:
  fdtdec_get_int() --> dev_read_s32_default()
- nexell_dw_mmc_dm.c renamed (back) to nexell_dw_mmc.c
- pinctrl-driver/dt is used now instead of configuring the mmc I/O-pins
  in the mmc-driver.
- nexell_dwmmc_ofdata_to_platdata() reworked, i.e. valid default values
  are used now (where possible) and the appropriate if-blocks have
  been removed.
- "nexell," removed from dt-properties, e.g. "nexell,bus-width" changed
  to "bus-width".
- new dt-property "mmcboost" is used now instead of "CONFIG_BOOST_MMC"
  which was not defined anywhere.
- Boot error "Loading Environment from MMC... *** Warning - No block
  device, using default environment" after updating local repository.
  Bugfix in drivers/mmc/nexell_dw_mmc.c: "#include <clk.h>" changed to
  "#include <asm/arch/clk.h>". This Bug showed up now because of the
  commit "dm: clk: add stub when CONFIG_CLK is deactivated" where
  include/clk.h has been changed.
- drivers/mmc/nexell_dw_mmc.c: '#include <log.h>' inserted because it
  has been removed from common.h.
- Kconfig: Missing helps added.
- Changed to livetree API as proposed by patman:
  fdt_stringlist_count() --> dev_read_string_count()
  fdt_stringlist_get() --> dev_read_string_index()
  fdtdec_get_int() --> dev_read_s32_default()
- doc/device-tree-bindings/pinctrl/nexell,s5pxx18-pinctrl.txt added.
- Handling of Configs for LCD backlight control reworked because (among
  others) not setting CONFIG_S5P4418_ONEWIRE and/or CONFIG_PWM_NX has
  caused errors when compiling board/friendlyarm/nanopi2/onewire.c.
- pwm.h: () around macro argument x added to avoid precedence issues.
- drivers/video/nexell/s5pxx18_dp_hdmi.c: '#include <log.h>' and
  '#include <linux/delay.h>' inserted because it has been removed from
  common.h.
- drivers/video/nexell_display.c: '#include <command.h>' inserted because
  '#include <image.h>' (includes command.h) has been removed from common.h.
- Changed to livetree API as proposed by patman:
  fdtdec_get_int() --> ofnode_read_s32_default()
  for (node = ...) --> ofnode_for_each_subnode()
  fdt_get_name() --> ofnode_get_name()
  fdt_getprop() --> dev_read_string()
- nx_display_probe() removed, nx_display_dev_probe_uclass() renamed to
  nx_display_probe().
- dts: pinctrl is supported now, therefore s5p4418-pinctrl.dtsi added,
  mmc- and i2c-entries extended appropriately. New mmc-property
  "mmcboost" added.
- Handling of Configs for LCD backlight control reworked because (among
  others) not setting CONFIG_S5P4418_ONEWIRE and/or CONFIG_PWM_NX has
  caused errors when compiling board/friendlyarm/nanopi2/onewire.c.
- arch/arm/cpu/armv7/s5p4418/cpu.c: '#include <linux/delay.h>' inserted
  because it has been removed from common.h.
- board/friendlyarm/nanopi2/board.c: Several includes inserted because
  some includes have been removed from common.h.
- Several initialisations of static variables to 0 removed because of
  appropriate errors of patman.
- CONFIG_SYS_RESERVE_MEM_SIZE removed, has not been used anymore
- s5p4418_nanopi2_defconfig: "CONFIG_PINCTRL=y" added because pinctrl
  is supported now. "CONFIG_EFI_LOADER=n" removed (there have been
  boot errors "efi_runtime_relocate: Unknown relocation type 0" at a
  previous U-Boot Version without this). "CONFIG_DM_I2C_GPIO=y" removed
  because I2C-peripherial is used (Nexell I2C driver). Some configs
  moved down for cosmetic reason.
- Handling of Configs for LCD backlight control reworked because (among
  others) not setting CONFIG_S5P4418_ONEWIRE and/or CONFIG_PWM_NX has
  caused errors when compiling board/friendlyarm/nanopi2/onewire.c.
- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END, CONFIG_CMDLINE_TAG
  and CONFIG_CMD_BMP moved from s5p4418_nanopi2.h to
  s5p4418_nanopi2_defconfig.
- "#undef CONFIG_CMD_IMLS" removed in s5p4418_nanopi2.h

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 (14):
  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
  pinctrl: 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                                        |   17 +
 arch/arm/Kconfig                                   |    7 +
 arch/arm/Makefile                                  |    1 +
 arch/arm/cpu/armv7/Makefile                        |    2 +
 arch/arm/cpu/armv7/s5p-common/Makefile             |   13 +-
 arch/arm/cpu/armv7/s5p-common/pwm.c                |   57 +-
 arch/arm/cpu/armv7/s5p4418/Makefile                |    6 +
 arch/arm/cpu/armv7/s5p4418/cpu.c                   |  121 ++
 arch/arm/dts/Makefile                              |    3 +
 arch/arm/dts/s5p4418-nanopi2.dts                   |  110 ++
 arch/arm/dts/s5p4418-pinctrl.dtsi                  |  135 ++
 arch/arm/dts/s5p4418.dtsi                          |  170 ++
 arch/arm/mach-nexell/Kconfig                       |   58 +
 arch/arm/mach-nexell/Makefile                      |   13 +
 arch/arm/mach-nexell/clock.c                       |  869 +++++++++
 arch/arm/mach-nexell/cmd_boot_linux.c              |  144 ++
 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                      |  107 ++
 arch/arm/mach-nexell/timer.c                       |  299 ++++
 board/friendlyarm/Kconfig                          |   37 +
 board/friendlyarm/nanopi2/Kconfig                  |   12 +
 board/friendlyarm/nanopi2/MAINTAINERS              |    7 +
 board/friendlyarm/nanopi2/Makefile                 |    7 +
 board/friendlyarm/nanopi2/board.c                  |  575 ++++++
 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                |  307 ++++
 board/friendlyarm/nanopi2/onewire.h                |   15 +
 configs/s5p4418_nanopi2_defconfig                  |  147 ++
 doc/README.s5p4418                                 |   63 +
 doc/device-tree-bindings/i2c/nx_i2c.txt            |   28 +
 .../pinctrl/nexell,s5pxx18-pinctrl.txt             |   78 +
 drivers/gpio/Kconfig                               |    9 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/nx_gpio.c                             |  250 +++
 drivers/i2c/Kconfig                                |    9 +
 drivers/i2c/Makefile                               |    1 +
 drivers/i2c/nx_i2c.c                               |  624 +++++++
 drivers/mmc/Kconfig                                |    8 +
 drivers/mmc/Makefile                               |    1 +
 drivers/mmc/nexell_dw_mmc.c                        |  237 +++
 drivers/pinctrl/Kconfig                            |    1 +
 drivers/pinctrl/Makefile                           |    1 +
 drivers/pinctrl/nexell/Kconfig                     |   18 +
 drivers/pinctrl/nexell/Makefile                    |    7 +
 drivers/pinctrl/nexell/pinctrl-nexell.c            |   66 +
 drivers/pinctrl/nexell/pinctrl-nexell.h            |   68 +
 drivers/pinctrl/nexell/pinctrl-s5pxx18.c           |  220 +++
 drivers/pinctrl/nexell/pinctrl-s5pxx18.h           |   53 +
 drivers/video/Kconfig                              |   10 +
 drivers/video/Makefile                             |    1 +
 drivers/video/nexell/Kconfig                       |   27 +
 drivers/video/nexell/Makefile                      |   12 +
 drivers/video/nexell/s5pxx18_dp.c                  |  341 ++++
 drivers/video/nexell/s5pxx18_dp_hdmi.c             |  545 ++++++
 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                     |  651 +++++++
 include/configs/s5p4418_nanopi2.h                  |  257 +++
 95 files changed, 17979 insertions(+), 5 deletions(-)
 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-pinctrl.dtsi
 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 doc/device-tree-bindings/pinctrl/nexell,s5pxx18-pinctrl.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.c
 create mode 100644 drivers/pinctrl/nexell/Kconfig
 create mode 100644 drivers/pinctrl/nexell/Makefile
 create mode 100644 drivers/pinctrl/nexell/pinctrl-nexell.c
 create mode 100644 drivers/pinctrl/nexell/pinctrl-nexell.h
 create mode 100644 drivers/pinctrl/nexell/pinctrl-s5pxx18.c
 create mode 100644 drivers/pinctrl/nexell/pinctrl-s5pxx18.h
 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