linux-kernel - Re: [v4 1/5] dt-bindings: mfd: Add aspeed pwm-tach binding

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Date:   Wed, 23 Nov 2022 09:27:17 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Billy Tsai <billy_tsai@...eedtech.com>, jdelvare@...e.com,
        linux@...ck-us.net, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, joel@....id.au, andrew@...id.au,
        lee@...nel.org, thierry.reding@...il.com,
        u.kleine-koenig@...gutronix.de, corbet@....net,
        p.zabel@...gutronix.de, linux-hwmon@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-pwm@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [v4 1/5] dt-bindings: mfd: Add aspeed pwm-tach binding

On 23/11/2022 09:24, Krzysztof Kozlowski wrote:
> On 23/11/2022 07:16, Billy Tsai wrote:
>> Add device binding for aspeed pwm-tach device which is a multi-function
>> device include pwm and tach function.
> 
> Subject: drop second, redundant "bindings".
> Also use proper PATCH prefix.
> 
>>
>> Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
>> ---
>>  .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 73 +++++++++++++++++++
>>  1 file changed, 73 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
>> new file mode 100644
>> index 000000000000..e2a7be2e0a18
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
>> @@ -0,0 +1,73 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +# Copyright (C) 2021 Aspeed, Inc.
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/aspeed,ast2600-pwm-tach.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: PWM Tach controller
>> +
>> +description: |
>> +  The PWM Tach controller is represented as a multi-function device which
>> +  includes:
>> +    PWM
>> +    Tach
>> +
>> +maintainers:
>> +  - Billy Tsai <billy_tsai@...eedtech.com>
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - enum:
>> +          - aspeed,ast2600-pwm-tach
>> +      - const: syscon
>> +      - const: simple-mfd
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  resets:
>> +    maxItems: 1
> 
> If this is simple-mfd then it cannot take clocks or resets.  Usually the
> recommendation for such case is: This is not simple-mfd, drop it. Drop
> also syscon and make a proper device.
> 
> However I am surprised to see such change, so I have no clue why this
> was done.

Actually now I see it was like that in previous patch, I just missed it
during previous review. Anyway this must be fixed.

Best regards,
Krzysztof