[PATCH 00/11] ARM: Initial Actions Semi S500 and S900 enablement

[Andreas Färber]

Hello,

Based on earlier work of mine for the LeMaker Guitar, this series adds initial
support for the Actions Semiconductor S500 (ARMv7) and S900 (ARMv8) SoCs.

Despite Actions Semi being a Linaro member since 2015, sadly I have not seen
a single upstream kernel patch submission since. Nor has the XApple community
taken any such initiative.

The GitHub LeMaker/linux-actions and xapp-le/kernel trees have 3.10 based S500
drivers in arch/arm/mach-owl/, whereas the 96boards-bubblegum/linux tree has
new-style but still 3.10 based S900 drivers. I also spotted GPLv2+ vs. GPLv2
license differences.

This series therefore provides a proof of concept for a combined S500 and S900
mainline implementation. Only earlycon serial output is available for now.

Focusing on Bubblegum-96, no S500 clocksource implementation is provided yet,
thus output on Guitar is less than on Bubblegum-96, but still it demonstrates
that a single driver can be shared for both, using compatible strings for
future differentiation.

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

Cc: mp-cs at actions-semi.com
Cc: info at ucrobotics.com
Cc: support at lemaker.org
Cc: contact at linux-xapple.org
Cc: devicetree at vger.kernel.org

Andreas Färber (11):
  Documentation: devicetree: Add vendor prefix for Actions Semi
  Documentation: devicetree: arm: Document Actions Semi S500
  ARM: Prepare Actions Semi S500
  ARM64: Prepare Actions Semi S900
  Documentation: devicetree: serial: Document Actions Semi Owl UARTs
  tty: serial: Add Actions Semi Owl UART earlycon
  Documentation: kernel-parameters: Document owl earlycon
  ARM: dts: Prepare Actions Semi S500 and LeMaker Guitar
  Documentation: devicetree: Add vendor prefix for uCRobotics
  Documentation: devicetree: arm: Document Actions Semi S900
  ARM64: dts: Prepare Actions Semi S900 and Bubblegum-96

 Documentation/admin-guide/kernel-parameters.txt    |   6 +
 Documentation/devicetree/bindings/arm/acts.txt     |  32 +++++
 .../devicetree/bindings/serial/acts,owl-uart.txt   |  16 +++
 .../devicetree/bindings/vendor-prefixes.txt        |   2 +
 arch/arm/Kconfig                                   |   2 +
 arch/arm/Makefile                                  |   1 +
 arch/arm/boot/dts/Makefile                         |   2 +
 arch/arm/boot/dts/s500-guitar-bb-rev-b.dts         |  63 ++++++++++
 arch/arm/boot/dts/s500-guitar.dtsi                 |  49 ++++++++
 arch/arm/boot/dts/s500.dtsi                        | 116 +++++++++++++++++
 arch/arm/mach-owl/Kconfig                          |   9 ++
 arch/arm/mach-owl/Makefile                         |   1 +
 arch/arm/mach-owl/owl.c                            |  28 +++++
 arch/arm64/Kconfig.platforms                       |   5 +
 arch/arm64/boot/dts/Makefile                       |   1 +
 arch/arm64/boot/dts/actions/Makefile               |   5 +
 arch/arm64/boot/dts/actions/s900-bubblegum96.dts   |  62 +++++++++
 arch/arm64/boot/dts/actions/s900.dtsi              | 140 +++++++++++++++++++++
 drivers/tty/serial/Kconfig                         |  19 +++
 drivers/tty/serial/Makefile                        |   1 +
 drivers/tty/serial/owl-uart.c                      | 135 ++++++++++++++++++++
 21 files changed, 695 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/acts.txt
 create mode 100644 Documentation/devicetree/bindings/serial/acts,owl-uart.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-owl/Kconfig
 create mode 100644 arch/arm/mach-owl/Makefile
 create mode 100644 arch/arm/mach-owl/owl.c
 create mode 100644 arch/arm64/boot/dts/actions/Makefile
 create mode 100644 arch/arm64/boot/dts/actions/s900-bubblegum96.dts
 create mode 100644 arch/arm64/boot/dts/actions/s900.dtsi
 create mode 100644 drivers/tty/serial/owl-uart.c

-- 
2.10.2