[PATCH v3 00/25] ARM: Initial Actions Semi S500 and S900 enablement

[Andreas Färber]

Hello,

This series adds initial support for Actions Semiconductor S500 (ARMv7) and
S900 (ARMv8) SoCs.

v3 has the serial driver working almost equally for both, still glitch on S900.
SMP support and power-gating for S500 are implemented, so both get 4 CPUs up.

https://github.com/afaerber/linux/commits/bg96-next

Booting from U-Boot is straightforward on both boards:

https://en.opensuse.org/HCL:Guitar
https://en.opensuse.org/HCL:Bubblegum-96

Have a lot of fun!

Cheers,
Andreas

v2 -> v3:
* Clocksource fix
* Clocksource cleanups (Daniel)
* Serial cleanups
* Add S500 CPU enable-method
* Add power domain driver
* Rework clocksource for S900 compatibility

v1 -> v2:
* S900 DT fixes (Mark)
* Kconfig name changes (Arnd)
* Bubblegum-96 .dts rename
* Vendor prefix rename
* Minor cleanups
* Add serial driver
* Add MAINTAINERS section
* Use SPDX-License-Identifier in DT (Rob)
* Add clocksource driver

Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Rob Herring <robh at kernel.org>
Cc: Daniel Lezcano <daniel.lezcano at linaro.org>
Cc: mp-cs at actions-semi.com
Cc: 96boards at ucrobotics.com
Cc: support at lemaker.org
Cc: linux-serial at vger.kernel.org
Cc: linux-doc at vger.kernel.org
Cc: devicetree at vger.kernel.org

Andreas Färber (25):
  dt-bindings: Add vendor prefix for Actions Semi
  dt-bindings: arm: Document Actions Semi S500
  dt-bindings: timer: Document Owl timer
  clocksource: Add Owl timer
  clocksource: owl: Add S900 support
  ARM: Prepare Actions Semi S500
  ARM64: Prepare Actions Semi S900
  dt-bindings: serial: Document Actions Semi Owl UARTs
  tty: serial: Add Actions Semi Owl UART earlycon
  Documentation: kernel-parameters: Document owl earlycon
  ARM: dts: Add Actions Semi S500 and LeMaker Guitar
  dt-bindings: Add vendor prefix for uCRobotics
  dt-bindings: arm: Document Actions Semi S900
  ARM64: dts: Add Actions Semi S900 and Bubblegum-96
  MAINTAINERS: Add Actions Semi Owl section
  tty: serial: owl: Implement console driver
  ARM64: dts: actions: s900-bubblegum-96: Add fake uart5 clock
  ARM: dts: s500-guitar-bb-rev-b: Add fake uart3 clock
  dt-bindings: arm: cpus: Add S500 enable-method
  ARM: owl: Implement CPU enable-method for S500
  ARM: dts: s500: Set CPU enable-method
  dt-bindings: power: Add Owl SPS power domains
  soc: actions: Add Owl SPS
  ARM: dts: s500: Add SPS node
  ARM: owl: smp: Reimplement SPS power-gating for CPU2 and CPU3

 Documentation/admin-guide/kernel-parameters.txt    |   6 +
 Documentation/devicetree/bindings/arm/actions.txt  |  39 ++
 Documentation/devicetree/bindings/arm/cpus.txt     |   1 +
 .../devicetree/bindings/power/actions,owl-sps.txt  |  17 +
 .../bindings/serial/actions,owl-uart.txt           |  16 +
 .../bindings/timer/actions,owl-timer.txt           |  20 +
 .../devicetree/bindings/vendor-prefixes.txt        |   2 +
 MAINTAINERS                                        |  10 +
 arch/arm/Kconfig                                   |   2 +
 arch/arm/Makefile                                  |   1 +
 arch/arm/boot/dts/Makefile                         |   2 +
 arch/arm/boot/dts/s500-guitar-bb-rev-b.dts         |  33 +
 arch/arm/boot/dts/s500-guitar.dtsi                 |  24 +
 arch/arm/boot/dts/s500.dtsi                        | 183 ++++++
 arch/arm/mach-actions/Kconfig                      |  15 +
 arch/arm/mach-actions/Makefile                     |   2 +
 arch/arm/mach-actions/headsmp.S                    |  68 ++
 arch/arm/mach-actions/owl.c                        |  28 +
 arch/arm/mach-actions/platsmp.c                    | 229 +++++++
 arch/arm64/Kconfig.platforms                       |   6 +
 arch/arm64/boot/dts/Makefile                       |   1 +
 arch/arm64/boot/dts/actions/Makefile               |   5 +
 arch/arm64/boot/dts/actions/s900-bubblegum-96.dts  |  42 ++
 arch/arm64/boot/dts/actions/s900.dtsi              | 164 +++++
 drivers/clocksource/Kconfig                        |   7 +
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/owl-timer.c                    | 205 ++++++
 drivers/soc/Kconfig                                |   1 +
 drivers/soc/Makefile                               |   1 +
 drivers/soc/actions/Kconfig                        |  12 +
 drivers/soc/actions/Makefile                       |   1 +
 drivers/soc/actions/owl-sps.c                      | 245 +++++++
 drivers/tty/serial/Kconfig                         |  19 +
 drivers/tty/serial/Makefile                        |   1 +
 drivers/tty/serial/owl-uart.c                      | 724 +++++++++++++++++++++
 include/dt-bindings/power/s500-powergate.h         |  19 +
 include/uapi/linux/serial_core.h                   |   3 +
 37 files changed, 2155 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/actions.txt
 create mode 100644 Documentation/devicetree/bindings/power/actions,owl-sps.txt
 create mode 100644 Documentation/devicetree/bindings/serial/actions,owl-uart.txt
 create mode 100644 Documentation/devicetree/bindings/timer/actions,owl-timer.txt
 create mode 100644 arch/arm/boot/dts/s500-guitar-bb-rev-b.dts
 create mode 100644 arch/arm/boot/dts/s500-guitar.dtsi
 create mode 100644 arch/arm/boot/dts/s500.dtsi
 create mode 100644 arch/arm/mach-actions/Kconfig
 create mode 100644 arch/arm/mach-actions/Makefile
 create mode 100644 arch/arm/mach-actions/headsmp.S
 create mode 100644 arch/arm/mach-actions/owl.c
 create mode 100644 arch/arm/mach-actions/platsmp.c
 create mode 100644 arch/arm64/boot/dts/actions/Makefile
 create mode 100644 arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
 create mode 100644 arch/arm64/boot/dts/actions/s900.dtsi
 create mode 100644 drivers/clocksource/owl-timer.c
 create mode 100644 drivers/soc/actions/Kconfig
 create mode 100644 drivers/soc/actions/Makefile
 create mode 100644 drivers/soc/actions/owl-sps.c
 create mode 100644 drivers/tty/serial/owl-uart.c
 create mode 100644 include/dt-bindings/power/s500-powergate.h

-- 
2.10.2