linux-kernel - Re: [PATCH v1 1/2] dt-bindings: power: Add the bq256xx dt bindings

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Date:   Tue, 18 Aug 2020 11:56:05 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Rob Herring <robh@...nel.org>,
        Ricardo Rivera-Matos <r-rivera-matos@...com>
CC:     <sre@...nel.org>, <linux-pm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/2] dt-bindings: power: Add the bq256xx dt bindings

Rob

On 8/18/20 11:43 AM, Rob Herring wrote:
> On Mon, Aug 17, 2020 at 02:17:22PM -0500, Ricardo Rivera-Matos wrote:
>> Add the bindings for the bq256xx series of battery charging ICs.
>>
>> Datasheets:
>> - https://www.ti.com/lit/ds/symlink/bq25600.pdf
>> - https://www.ti.com/lit/ds/symlink/bq25601.pdf
>> - https://www.ti.com/lit/ds/symlink/bq25600d.pdf
>> - https://www.ti.com/lit/ds/symlink/bq25601d.pdf
>> - https://www.ti.com/lit/ds/symlink/bq25611d.pdf
>> - https://www.ti.com/lit/ds/symlink/bq25618.pdf
>> - https://www.ti.com/lit/ds/symlink/bq25619.pdf
>>
>> Signed-off-by: Ricardo Rivera-Matos <r-rivera-matos@...com>
>> ---
>>   .../bindings/power/supply/bq256xx.yaml        | 99 +++++++++++++++++++
>>   1 file changed, 99 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/power/supply/bq256xx.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/power/supply/bq256xx.yaml b/Documentation/devicetree/bindings/power/supply/bq256xx.yaml
>> new file mode 100644
>> index 000000000000..67db4ba9fdb6
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/power/supply/bq256xx.yaml
>> @@ -0,0 +1,99 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> +# Copyright (C) 2020 Texas Instruments Incorporated
>> +%YAML 1.2
>> +---
>> +$id: "http://devicetree.org/schemas/power/supply/bq256xx.yaml#"
>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
>> +
>> +title: TI bq256xx Switch Mode Buck Charger
>> +
>> +maintainers:
>> +  - Ricardo Rivera-Matos <r-rivera-matos@...com>
>> +
>> +description: |
>> +  The bq256xx devices are a family of highly-integrated battery charge
>> +  management and system power management ICs for single cell Li-ion and Li-
>> +  polymer batteries.
>> +
>> +  Datasheets:
>> +    - https://www.ti.com/lit/ds/symlink/bq25600.pdf
>> +    - https://www.ti.com/lit/ds/symlink/bq25601.pdf
>> +    - https://www.ti.com/lit/ds/symlink/bq25600d.pdf
>> +    - https://www.ti.com/lit/ds/symlink/bq25601d.pdf
>> +    - https://www.ti.com/lit/ds/symlink/bq25611d.pdf
>> +    - https://www.ti.com/lit/ds/symlink/bq25618.pdf
>> +    - https://www.ti.com/lit/ds/symlink/bq25619.pdf
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - ti,bq25600
>> +      - ti,bq25601
>> +      - ti,bq25600d
>> +      - ti,bq25601d
>> +      - ti,bq25611d
>> +      - ti,bq25618
>> +      - ti,bq25619
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  ti,watchdog-timer:
> Poorly named since we have 'ti,watchdog-timers' already and is
> completely different.

I think you made a comment on my DT to make this ti,watchdog-timeout-ms 
and then we can remove the type.


>
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    description: |
>> +      Watchdog timer in milli seconds. 0 (default) disables the watchdog
> If you have units, then you should use standard unit suffix.
>
>> +    minimum: 0
>> +    maximum: 160000
>> +    enum: [ 0, 40000, 80000, 160000]
>> +
>> +  input-voltage-limit-microvolt:
>> +    description: |
>> +       Minimum input voltage limit in micro volts with a 100000 micro volt step
>> +    minimum: 3900000
>> +    maximum: 5400000
>> +
>> +  input-current-limit-microamp:
>> +    description: |
>> +       Maximum input current limit in micro amps with a 100000 micro amp step
>> +    minimum: 100000
>> +    maximum: 3200000
> Aren't these properties of the battery, not the charger?
>
>> +
>> +required:
>> +  - compatible
>> +  - reg
> monitored-battery not required?
>
> Add:
>
> additionalProperties: false

What about using

unevaluatedProperties: false

Dan