linux-kernel - Re: [PATCH 1/3] dt-bindings: power: Add power sequence for Amloigc WCN chips

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Message-ID: <25ead9fe-0747-47fe-bf7b-0958706377c8@amlogic.com>
Date: Mon, 8 Jul 2024 14:12:50 +0800
From: Yang Li <yang.li@...ogic.com>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: power: Add power sequence for Amloigc
 WCN chips

Dear Bartosz

Thanks for your careful guidance and suggestions.

> On Fri, Jul 5, 2024 at 1:13 PM Yang Li via B4 Relay
> <devnull+yang.li.amlogic.com@...nel.org> wrote:
>> From: Yang Li <yang.li@...ogic.com>
>>
>> Add binding document to introduce power sequence of
>> Amlogic WCN chips.
>>
> Hi! Thanks for the interest in this new subsystem.
>
>> Signed-off-by: Yang Li <yang.li@...ogic.com>
>> ---
>>   .../bindings/power/amlogic,w155s2-pwrseq.yaml      | 62 ++++++++++++++++++++++
>>   1 file changed, 62 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/power/amlogic,w155s2-pwrseq.yaml b/Documentation/devicetree/bindings/power/amlogic,w155s2-pwrseq.yaml
>> new file mode 100644
>> index 000000000000..f99a775fcf9b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/power/amlogic,w155s2-pwrseq.yaml
>> @@ -0,0 +1,62 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/power/amlogic,w155s2-pwrseq.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Amlogic power sequence for WCN chips
>> +
>> +maintainers:
>> +  - Yang Li <yang.li@...ogic.com>
>> +
>> +description:
>> +  The Amlogic WCN chip contains discrete modules for WLAN and Bluetooth. Power on
>> +  Bluetooth and Wi-Fi respectively, including chip_en pull-up and bt_en pull-up,
>> +  and generation of the 32.768KHz clock.
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - const: amlogic,w155s2-pwrseq
>> +      - items:
>> +          - enum:
>> +              - amlogic,w265s1-pwrseq
>> +              - amlogic,w265p1-pwrseq
>> +              - amlogic,w265s2-pwrseq
>> +          - const: amlogic,w155s2-pwrseq
> The name is wrong. There's no such device as 'pwrseq'. There's most
> likely some kind of a Power Management Unit and the compatible string
> must reflect this.

Yes, I got it!

I will change "pwrseq" to "pmu".

>> +
>> +  clocks:
>> +    maxItems: 1
>> +    description: clock provided to the controller (32.768KHz)
>> +
>> +  clock-names:
>> +    items:
>> +      - const: ext_clock
>> +
>> +  amlogic,chip-enable-gpios:
>> +    maxItems: 1
>> +    description: gpio specifier used to enable chipset
> Why not simply: chip-enable-gpios or even enable-gpios?
Well, I will do. "amlogic,chip-enable-gpios" => "enable-gpios"
>
>> +
>> +  amlogic,bt-enable-gpios:
>> +    maxItems: 1
>> +    description: gpio specifier used to enable BT
>> +
> Same here: should be simply bt-enable-gpios.
>
> Bart
Well, I well change "amlogic,bt-enable-gpios" to "bt-enable-gpios".
>> +required:
>> +  - compatible
>> +  - clocks
>> +  - clock-names
>> +  - amlogic,chip-enable-gpios
>> +  - amlogic,bt-enable-gpios
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +    wcn_pwrseq {
>> +        compatible = "amlogic,w155s2-pwrseq";
>> +        clocks = <&extclk>;
>> +        clock-names = "ext_clock";
>> +        amlogic,chip-enable-gpios = <&gpio 7 GPIO_ACTIVE_HIGH>;
>> +        amlogic,bt-enable-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
>> +    };
>>
>> --
>> 2.42.0
>>
>>