linux-kernel - Re: [PATCH 0/9] MIPS: CI20: Add WiFi / Bluetooth support

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Date:   Thu, 15 Jun 2023 09:00:04 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-mips@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        list@...ndingux.net
Subject: Re: [PATCH 0/9] MIPS: CI20: Add WiFi / Bluetooth support

Hi Paul,
I was in holidays and could not review this series earlier.


> Am 04.06.2023 um 16:56 schrieb Paul Cercueil <paul@...pouillou.net>:
> 
> Hi,
> 
> Here's a set of patches to add support for the WiFi / Bluetooth chip on
> the CI20.
> 
> WiFi works pretty well, provided it is used with the latest firmware
> provided by linux-firmware. Bluetooth does not work very well here, as
> I cannot get my wireless keyboard to pair; but it does detect it, and it
> does see they key presses when I type the pairing code.
> 
> I only tested with a somewhat recent (~2022) Buildroot-based userspace.
> I enabled WEXT compatibility because the CI20 is typically used with a
> very old userspace, but I did not try to use it with old tools like
> ifconfig/iwconfig.

^^^ great since not everyone is using memory hungry latest user-space and
ifconfig/iwconfig is also available on some other OS so users like me
can share scripts.


But I had quite some issues with this series.

1. I could not boot my CI20 V2a board after applying the full series to v6.4-rc6
2. bisecting failed because vcc_33v is used in a patch preceding its definition
   leading to DTC compile abort
3. after fixing I could bisect that "MIPS: DTS: CI20: Fix ACT8600 regulator node names"
   is the first bad commit - although I don't see immediately why

So this series seems to be severely broken and I could not even come to
a test of WiFi and/or Bluetooth which the series claims to support.

Comments to some individual patches follow.

Best regards and looking forward to a v2 for testing,
Nikolaus


> 
> Cheers,
> -Paul
> 
> Paul Cercueil (9):
>  MIPS: DTS: CI20: Fix regulators
>  MIPS: DTS: CI20: Fix ACT8600 regulator node names
>  MIPS: DTS: CI20: Add parent supplies to ACT8600 regulators

^^^ should IMHO be a separate series since it is not directly related to WiFi / Bluetooth

>  MIPS: DTS: CI20: Do not force-enable CIM and WiFi regulators
>  MIPS: DTS: CI20: Misc. cleanups

^^^ these two do not compile
The Misc. cleanups do not belong to this topic.

>  MIPS: DTS: CI20: Parent MSCMUX clock to MPLL

^^^ this is only loosely related to Wifi / Bluetooth

>  MIPS: DTS: CI20: Enable support for WiFi / Bluetooth
>  MIPS: configs: CI20: Regenerate defconfig
>  MIPS: configs: CI20: Enable WiFi / Bluetooth
> 
> arch/mips/boot/dts/ingenic/ci20.dts | 148 +++++++++++++++++++---------
> arch/mips/configs/ci20_defconfig    |  47 ++++++---
> 2 files changed, 133 insertions(+), 62 deletions(-)
> 
> -- 
> 2.39.2
>