linux-kernel - Re: [PATCH 00/12] riscv: Allwinner D1 platform support

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Message-ID: <6d54da3f-d4fc-7c40-38d6-4f02c7346458@sholland.org>
Date:   Mon, 15 Aug 2022 21:42:07 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Conor.Dooley@...rochip.com, wens@...e.org,
        jernej.skrabec@...il.com, linux-sunxi@...ts.linux.dev,
        palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/12] riscv: Allwinner D1 platform support

On 8/15/22 12:12 PM, Conor.Dooley@...rochip.com wrote:
> On 15/08/2022 08:05, Conor Dooley wrote:
>> Hey Samuel,
>> Apologies for the last email, the first 5 patches in this series
>> didn't correctly land in my inbox and I skimmed & replied to the
>> wrong cover letter... I blame it being pre 8 AM ;)
>>
>> On 15/08/2022 06:08, Samuel Holland wrote:
>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>
>>> This series adds the Kconfig/defconfig plumbing and devicetrees for a
>>> range of Allwinner D1-based boards. Many features are already enabled,
>>> including USB, Ethernet, and WiFi.
>>>
>>> The SoC devicetree uses bindings from the following series which have
>>> not yet been merged:
>>> - SRAM controller:
>>>    https://lore.kernel.org/lkml/20220815041248.53268-1-samuel@sholland.org/
>>> - NVMEM cell bits property change:
>>>    https://lore.kernel.org/lkml/20220814173656.11856-1-samuel@sholland.org/
>>> - In-package LDO regulators:
>>>    https://lore.kernel.org/lkml/20220815043436.20170-1-samuel@sholland.org/
>>>
>>> All three of these are required to set the correct I/O domain voltages
>>> in the pin controller, which I would consider important to have in the
>>> initial version of the devicetree.
>>>
>>> The SoC devicetree does contain one small hack to avoid a dependency on
>>> the audio codec binding, since that is not ready yet: the codec node
>>> uses a bare "simple-mfd", "syscon" compatible.
>>
>>
>> I tried this series on top of both 6.0-rc1 & next, but I saw a shed
>> load of errors from dtbs_check. I'll take a look at the rest of the
>> series later on, but just FYI. This time I did at least read the
>> right cover letter and actually applied your dependent series..
>> /facepalm
>>
>> I have been trying to get riscv down to 0 warnings and would not be
>> in favour of accepting patches that go in the other direction.
>> (This patchset currently produces about 47 new warnings)

Only 4 unique ones :)

Thanks for checking this. I had done a couple of passes cleaning things up. The
remaining warnings are the ones I was unsure how to fix.

> FWIW this is what I see, LMK if I am missing something.
> allwinner/sun20i-d1-lichee-rv.dtb: i2c@...2000: Unevaluated properties are not allowed ('dma-names', 'dmas' were unexpected)

This one is new with dt-schema 2022.08.1 (I was previously on d1f3102e locally).
I'm not sure if it is a bug in the binding or in the dt-schema tool. The
warnings go away if I do:

--- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
@@ -72,6 +72,7 @@ required:
   - interrupts

 allOf:
+  - $ref: /schemas/dma/dma.yaml#
   - $ref: /schemas/i2c/i2c-controller.yaml#
   - if:
       properties:

But I wouldn't expect this to be necessary, since dma.yaml has "select: true".
Compare the this with the UARTs. Neither serial/snps-dw-apb-uart.yaml nor
serial/serial.yaml references any DMA properties, yet there is no warning for those.

> allwinner/sun20i-d1-clockworkpi-v3.14.dtb: pmic@34: compatible: 'oneOf' conditional failed, one must be fixed:
> allwinner/sun20i-d1-devterm-v3.14.dtb: pmic@34: compatible: 'oneOf' conditional failed, one must be fixed:

The new compatible is in linux-next. I can add it to the cover letter for v2:
https://lore.kernel.org/linux-devicetree/20220810013430.27061-1-samuel@sholland.org/
https://git.kernel.org/lee/mfd/c/97ecda0f615e

> allwinner/sun20i-d1-lichee-rv.dtb: ethernet@...0000: Unevaluated properties are not allowed ('mdio', 'reset-names', 'resets' were unexpected)

This showed up with a dt-schema update in the last year or so. This may be a bug
in the binding? allwinner,sun8i-a83t-emac.yaml picks up these three properties
from snps,dwmac.yaml, but does not have them in its own "properties" block.
(resets and reset-names are even in "required"!)

> allwinner/sun20i-d1-lichee-rv-86-panel-720p.dtb: ethernet@...0000: Unevaluated properties are not allowed ('phy-supply' was unexpected)
> allwinner/sun20i-d1-dongshan-nezha-stu.dtb: ethernet@...0000: Unevaluated properties are not allowed ('phy-supply' was unexpected)

I think this one is just flat out missing from the binding. It is present in the
other two Allwinner Ethernet MAC bindings, but not this one.

Regards,
Samuel