[v3,00/20] Add minimal Tensor/GS101 SoC support and Oriole/Pixel6 board

Hi folks,

Firstly, thanks to everyone who reviewed the v2/V1 series! V3 incorporates
all the review feedback received so far.

As this series spans multiple subsytems the expectation is that Krzysztof
will apply the whole series through the Samsung SoC tree. If the relevant
subsystem maintainers can give a acked-by or reviewed-by on the relevant
patches that would be most appreciated!

This series adds initial SoC support for the GS101 SoC and also initial board
support for Pixel 6 phone (Oriole).

The gs101 / Tensor SoC is also used in Pixel6a (bluejay) and Pixel 6 Pro
(raven) phones. Currently DT is added for the gs101 SoC and Oriole.
As you can see from the patches the SoC is based on a Samsung Exynos SoC,
and therefore lots of the low level Exynos drivers and bindings can be
re-used.

The support added in this series consists of:
* cpus
* pinctrl
* some CCF implementation
* watchdog
* uart
* gpio

This is enough to boot through to a busybox initramfs and shell using an
upstream kernel though :) More platform support will be added over the
following weeks and months.

For further information on how to build and flash the upstream kernel on your
Pixel 6, with a prebuilt busybox initramfs please refer to the script and
README.md here:

https://git.codelinaro.org/linaro/googlelt/pixelscripts

Note 1: I've removed the dtbo overlay from v2 and later submissions and
will re-submit once I have appropriate documentation for it.

Note 2: I've left the bootargs in dts with earlycon for now, for two reasons.
1) The bootloader hangs if bootargs isn't present in the dtb as it tries to
re-write this with additional bootargs.
2) there is a issue whereby the full serial console doesn't come up properly
if earlycon isn't also specified. This issue needs further investigation.

kind regards,

Peter.

Changes since v2:
 - Fixup pinctrl@174d0000: interrupts: [..] is too long DTC warning (Tudor)
 - Add missing windowed watchdog code (Guenter)
 - Fixup UART YAML bindings error (Krzysztof)
 - gs101.dtsi add missing serial_0 alias (me)
 - samsung_tty.c: fixup gs101_serial_drv_data so fifosize os obtained from DT
 
Changes since v1:
 - Remove irq/gs101.h and replace macros with irq numbers globally
 - exynos-pmu - keep alphabetical order
 - add cmu_apm to clock bindings documentation
 - sysreg bindings - remove superfluous `google,gs101-sysreg`
 - watchdog bindings - Alphanumerical order, update gs201 comment
 - samsung,pinctrl.yaml - add new "if:then:else:" to narrow for google SoC
 - samsung,pinctrl-wakeup-interrupt.yaml - Alphanumerical order
 - samsung,pinctrl- add google,gs101-wakeup-eint compatible
 - clk-pll: fixup typos
 - clk-gs101: fix kernel test robot warnings (add 2 new clocks,dividers,gate)
 - clk-gs101: fix alphabetical order
 - clk-gs101: cmu_apm: fixup typo and missing empty entry
 - clk-gs101: cmu_misc: remove clocks that were being registerred twice
 - pinctrl: filter sel: rename/reorder variables, add comment for FLTCON bitfield
 - pinctrl: filter sel: avoid setting reserved bits by loop over FLTCON1 pins as well
 - pinctrl: gs101: rename bank_type_6/7 structs to be more specific, split from filter
 - watchdog: s3c2410_wdt: remove dev_info prints
 - gs101.dtsi/oriole.dts: order by unit node, remove underscores from node name, blank lines
   add SoC node, split dts and dtsi into separate patches, remove 'DVT' suffix
 - gs101-oriole.dtso: Remove overlay until board_id is documented properly
 - Add GS101_PIN_* macros to gs101-pinctrl.h instead of using Exynos ones
 - gpio-keys: update linux,code to use input-event-code macros
 - add dedicated gs101-uart compatible

Peter Griffin (20):
  dt-bindings: soc: samsung: exynos-pmu: Add gs101 compatible
  dt-bindings: clock: Add Google gs101 clock management unit bindings
  dt-bindings: soc: google: exynos-sysreg: add dedicated SYSREG
    compatibles to GS101
  dt-bindings: watchdog: Document Google gs101 & gs201 watchdog bindings
  dt-bindings: arm: google: Add bindings for Google ARM platforms
  dt-bindings: pinctrl: samsung: add google,gs101-pinctrl compatible
  dt-bindings: pinctrl: samsung: add gs101-wakeup-eint compatible
  dt-bindings: serial: samsung: Add google-gs101-uart compatible
  clk: samsung: clk-pll: Add support for pll_{0516,0517,518}
  clk: samsung: clk-gs101: Add cmu_top registers, plls, mux and gates
  clk: samsung: clk-gs101: add CMU_APM support
  clk: samsung: clk-gs101: Add support for CMU_MISC clock unit
  pinctrl: samsung: Add filter selection support for alive banks
  pinctrl: samsung: Add gs101 SoC pinctrl configuration
  watchdog: s3c2410_wdt: Add support for Google tensor SoCs
  tty: serial: samsung: Add gs101 compatible and SoC data
  arm64: dts: google: Add initial Google gs101 SoC support
  arm64: dts: google: Add initial Oriole/pixel 6 board support
  arm64: defconfig: Enable Google Tensor SoC
  MAINTAINERS: add entry for Google Tensor SoC

 .../devicetree/bindings/arm/google.yaml       |   46 +
 .../bindings/clock/google,gs101-clock.yaml    |  125 +
 .../samsung,pinctrl-wakeup-interrupt.yaml     |    2 +
 .../bindings/pinctrl/samsung,pinctrl.yaml     |   22 +-
 .../bindings/serial/samsung_uart.yaml         |    1 +
 .../bindings/soc/samsung/exynos-pmu.yaml      |    2 +
 .../soc/samsung/samsung,exynos-sysreg.yaml    |    6 +
 .../bindings/watchdog/samsung-wdt.yaml        |   10 +-
 MAINTAINERS                                   |   10 +
 arch/arm64/Kconfig.platforms                  |    6 +
 arch/arm64/boot/dts/Makefile                  |    1 +
 arch/arm64/boot/dts/google/Makefile           |    4 +
 arch/arm64/boot/dts/google/gs101-oriole.dts   |   79 +
 arch/arm64/boot/dts/google/gs101-pinctrl.dtsi | 1275 ++++++++++
 arch/arm64/boot/dts/google/gs101-pinctrl.h    |   32 +
 arch/arm64/boot/dts/google/gs101.dtsi         |  504 ++++
 arch/arm64/configs/defconfig                  |    1 +
 drivers/clk/samsung/Kconfig                   |    9 +
 drivers/clk/samsung/Makefile                  |    2 +
 drivers/clk/samsung/clk-gs101.c               | 2164 +++++++++++++++++
 drivers/clk/samsung/clk-pll.c                 |    9 +-
 drivers/clk/samsung/clk-pll.h                 |    3 +
 .../pinctrl/samsung/pinctrl-exynos-arm64.c    |  163 ++
 drivers/pinctrl/samsung/pinctrl-exynos.c      |   84 +-
 drivers/pinctrl/samsung/pinctrl-exynos.h      |   41 +
 drivers/pinctrl/samsung/pinctrl-samsung.c     |    4 +
 drivers/pinctrl/samsung/pinctrl-samsung.h     |   24 +
 drivers/tty/serial/samsung_tty.c              |   13 +
 drivers/watchdog/s3c2410_wdt.c                |  127 +-
 include/dt-bindings/clock/google,gs101.h      |  232 ++
 30 files changed, 4985 insertions(+), 16 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/google.yaml
 create mode 100644 Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
 create mode 100644 arch/arm64/boot/dts/google/Makefile
 create mode 100644 arch/arm64/boot/dts/google/gs101-oriole.dts
 create mode 100644 arch/arm64/boot/dts/google/gs101-pinctrl.dtsi
 create mode 100644 arch/arm64/boot/dts/google/gs101-pinctrl.h
 create mode 100644 arch/arm64/boot/dts/google/gs101.dtsi
 create mode 100644 drivers/clk/samsung/clk-gs101.c
 create mode 100644 include/dt-bindings/clock/google,gs101.h