[0/2] arm64: dts: allwinner: Add BananaPi M4 Berry

The BananaPi M4 Berry is a development board with the Allwinner H618
SoC. It comes with 2GB DRAM and 8GB eMMC flash, with the usual suspects
like HDMI, SD card, GPIO headers. There are four USB ports connected
via an on-board hub chip, and a Gigabit Ethernet socket. Also there is
a USB WiFi chip soldered on the board.
More details: https://linux-sunxi.org/Sinovoip_Banana_Pi_M4_Berry

I don't have this board, so this is a "call for testing".
One thing to consider:
- The USB WiFi chip has a CHIP_EN pin, which can turn the chip off.
  It is pulled up by a resistor, so works out of the box, but is also
  connected to a GPIO (PC2), so the chip can be disabled or reset via
  this pin. Since this is a USB device, we don't have a DT node to
  announce this pin. Any ideas how this should be handled? At the moment
  I ignore it, but it could also be modelled as a USB VBUS regulator for
  USB port 1, to which it is connected.

When testing this, please have a look at:
- Does the eMMC work in HS200 mode? The vendor DT described that as a
  3.3V controlled eMMC only, but clearly the schematic uses 1.8V, which
  allows faster transfer modes. "hdparm -t" should suffice for a quick
  test.
- Do USB full-speed (aka USB v1.1) peripherals like keyboard or mouse
  work on the USB ports? I disabled the OHCI node, since the hub should
  not need this, but it would be good to double check.
- Similarly the USB WiFi chip probably doesn't need USB 1.1 modes, so
  please check this still works.

Apart from the missing audio and video support (which are due to missing
bindings for the H616/H618 SoC), most of the peripherals are supported.

Patch 1/2 adds the board compatible string to the bindings, patch 2/2
adds the actual .dts file.

Please have a look!

Thanks,
Andre

Andre Przywara (2):
  dt-bindings: arm: sunxi: document BananaPi M4 Berry board name
  arm64: dts: allwinner: h618: add BananaPi M4 Berry board

 .../devicetree/bindings/arm/sunxi.yaml        |   5 +
 arch/arm64/boot/dts/allwinner/Makefile        |   1 +
 .../sun50i-h618-bananapi-m4-berry.dts         | 229 ++++++++++++++++++
 3 files changed, 235 insertions(+)
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h618-bananapi-m4-berry.dts

On Mon, Dec 18, 2023 at 7:24 AM Andre Przywara <andre.przywara@arm.com> wrote:
>
> The BananaPi M4 Berry is a development board with the Allwinner H618
> SoC. It comes with 2GB DRAM and 8GB eMMC flash, with the usual suspects
> like HDMI, SD card, GPIO headers. There are four USB ports connected
> via an on-board hub chip, and a Gigabit Ethernet socket. Also there is
> a USB WiFi chip soldered on the board.
> More details: https://linux-sunxi.org/Sinovoip_Banana_Pi_M4_Berry
>
> I don't have this board, so this is a "call for testing".
> One thing to consider:
> - The USB WiFi chip has a CHIP_EN pin, which can turn the chip off.
>   It is pulled up by a resistor, so works out of the box, but is also
>   connected to a GPIO (PC2), so the chip can be disabled or reset via
>   this pin. Since this is a USB device, we don't have a DT node to
>   announce this pin. Any ideas how this should be handled? At the moment
>   I ignore it, but it could also be modelled as a USB VBUS regulator for
>   USB port 1, to which it is connected.

There was a talk on this topic at Plumbers:

https://lpc.events/event/17/contributions/1507/

So I'd say a proper solution is being worked on.

ChenYu

> When testing this, please have a look at:
> - Does the eMMC work in HS200 mode? The vendor DT described that as a
>   3.3V controlled eMMC only, but clearly the schematic uses 1.8V, which
>   allows faster transfer modes. "hdparm -t" should suffice for a quick
>   test.
> - Do USB full-speed (aka USB v1.1) peripherals like keyboard or mouse
>   work on the USB ports? I disabled the OHCI node, since the hub should
>   not need this, but it would be good to double check.
> - Similarly the USB WiFi chip probably doesn't need USB 1.1 modes, so
>   please check this still works.
>
> Apart from the missing audio and video support (which are due to missing
> bindings for the H616/H618 SoC), most of the peripherals are supported.
>
> Patch 1/2 adds the board compatible string to the bindings, patch 2/2
> adds the actual .dts file.
>
> Please have a look!
>
> Thanks,
> Andre
>
> Andre Przywara (2):
>   dt-bindings: arm: sunxi: document BananaPi M4 Berry board name
>   arm64: dts: allwinner: h618: add BananaPi M4 Berry board
>
>  .../devicetree/bindings/arm/sunxi.yaml        |   5 +
>  arch/arm64/boot/dts/allwinner/Makefile        |   1 +
>  .../sun50i-h618-bananapi-m4-berry.dts         | 229 ++++++++++++++++++
>  3 files changed, 235 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h618-bananapi-m4-berry.dts
>
> --
> 2.35.8
>