[PATCH v5 0/7] Add EcoNet EN751221 MIPS platform support

[Thomas Bogendoerfer]

On Wed, May 07, 2025 at 01:44:53PM +0000, Caleb James DeLisle wrote:
> EcoNet MIPS SoCs are big endian machines based on 34Kc and 1004Kc
> processors. They are found in xDSL and xPON modems, and contain PCM
> (VoIP), Ethernet, USB, GPIO, I2C, SPI (Flash), UART, and PCIe.
> 
> The EcoNet MIPS SoCs are divided broadly into two families, the
> EN751221 family based on the 34Kc, and the EN751627 family based on
> the 1004Kc. Individual SoCs within a family are very similar, only
> with different peripherals.
> 
> This patchset adds basic "boots to a console" support for the EN751221
> family and adds SmartFiber XP8421-B, a low cost commercially available
> board that is useful for testing and development.
> 
> Note that Airoha (AN7523, AN7581) is similar to EcoNet in terms of
> peripherals, and for historical reasons Airoha chips are sometimes
> referred to with the EN75xx prefix. However this is a different
> platform because Airoha chips are ARM based.
> 
> This patchset is against mips-next.
> 
> v4 -> v5
> * 2/7 clocksource/drivers: Add EcoNet Timer HPT driver:
>   * Improve explanation of HPT timer in changelog
>   * Move pr_info to pr_debug per recommendation
>   * Remove pointless debug on spurious interrupt
>   * Small code-style change
> 
> v3 -> v4
> * Rebase to 3b3704261e851e25983860e4c352f1f73786f4ab
> * Omit already accepted patches (thanks guys!):
>   - https://patchwork.kernel.org/project/linux-mips/patch/20250330170306.2584136-2-cjd@cjdns.fr/
>   - https://patchwork.kernel.org/project/linux-mips/patch/20250330170306.2584136-3-cjd@cjdns.fr/
>   - https://patchwork.kernel.org/project/linux-mips/patch/20250330170306.2584136-4-cjd@cjdns.fr/
> 
> v2 -> v3
> * econet,en751221-timer.yaml -> Improve code style
> * vendor-prefixes.yaml -> Correct alphabetic order
> * en751221.dtsi
>   - interrupt-controller code style
>   - serial: Explain reason for clock-frequency = <1843200>
> * v3->v3 diff provided for reference
>   - https://gist.github.com/cjdelisle/21c9f0cd225f499bdff3c574c7f185f2
> * CC: linux-mediatek at lists.infradead.org who may be interested.
> 
> v1 -> v2
> * Codestyle
>   - Apply codestyle from "The tip tree handbook" and recommendations
>   - Remove "_rai" and "_m" symbol suffixes which are not standard
> * irq-econet-en751221.c
>   - Use cleanup.h _guard() and _free()
>   - Separate irq_domain_ops from irq_chip, eliminating econet_intc struct
>   - Remove irqsave in econet_wreg, irqs are already disabled in mask/unmask
>   - Add explainatory comments
>   - Refactor shadow logic for clarity, e.g. INTC_NO_SHADOW -> NOT_PERCPU
>   - Improve error handling in case of invalid DTS
> * econet,timer-hpt.yaml
>   - Rename to econet,timer-en751221.yaml
>   - Impose rule: "reg" must have 1 item on EN751221 and 2 on EN751627
> * timer-econet-hpt.c
>   - Rename to timer-econet-en751221.c to follow naming scheme from DT
> * econet,en751221-intc.yaml
>   - Fix validation error from required: interrupt-parent
>   - shadow-interrupts -> switch to uint32-matrix for list of pairs
> * MAINTAINERS -> Fixed accidental F: MAINTAINERS
> * Replace "test image" with device SmartFiber-XP8421-B
> * Restructure arch/mips/econet/Kconfig per arch/mips/ralink example
> * v1->v2 diff is offered for reference:
>   - https://gist.github.com/cjdelisle/bb3acab78b5f70dcdfe5dd6338293efe
> 
> 
> Caleb James DeLisle (7):
>   dt-bindings: timer: Add EcoNet EN751221 "HPT" CPU Timer
>   clocksource/drivers: Add EcoNet Timer HPT driver
>   dt-bindings: mips: Add EcoNet platform binding
>   mips: Add EcoNet MIPS platform support
>   dt-bindings: vendor-prefixes: Add SmartFiber
>   mips: dts: Add EcoNet DTS with EN751221 and SmartFiber XP8421-B board
>   MAINTAINERS: Add entry for newly added EcoNet platform.
> 
>  .../devicetree/bindings/mips/econet.yaml      |  26 +++
>  .../bindings/timer/econet,en751221-timer.yaml |  80 +++++++
>  .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
>  MAINTAINERS                                   |  12 +
>  arch/mips/Kbuild.platforms                    |   1 +
>  arch/mips/Kconfig                             |  25 ++
>  arch/mips/boot/compressed/uart-16550.c        |   5 +
>  arch/mips/boot/dts/Makefile                   |   1 +
>  arch/mips/boot/dts/econet/Makefile            |   2 +
>  arch/mips/boot/dts/econet/en751221.dtsi       |  67 ++++++
>  .../econet/en751221_smartfiber_xp8421-b.dts   |  19 ++
>  arch/mips/econet/Kconfig                      |  48 ++++
>  arch/mips/econet/Makefile                     |   2 +
>  arch/mips/econet/Platform                     |   5 +
>  arch/mips/econet/init.c                       |  78 +++++++
>  drivers/clocksource/Kconfig                   |   8 +
>  drivers/clocksource/Makefile                  |   1 +
>  drivers/clocksource/timer-econet-en751221.c   | 216 ++++++++++++++++++
>  18 files changed, 598 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mips/econet.yaml
>  create mode 100644 Documentation/devicetree/bindings/timer/econet,en751221-timer.yaml
>  create mode 100644 arch/mips/boot/dts/econet/Makefile
>  create mode 100644 arch/mips/boot/dts/econet/en751221.dtsi
>  create mode 100644 arch/mips/boot/dts/econet/en751221_smartfiber_xp8421-b.dts
>  create mode 100644 arch/mips/econet/Kconfig
>  create mode 100644 arch/mips/econet/Makefile
>  create mode 100644 arch/mips/econet/Platform
>  create mode 100644 arch/mips/econet/init.c
>  create mode 100644 drivers/clocksource/timer-econet-en751221.c

applied patches 3-7 to mips-next

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]