From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Luca Weiss <luca.weiss@fairphone.com>, linux-input@vger.kernel.org
Cc: ~postmarketos/upstreaming@lists.sr.ht,
phone-devel@vger.kernel.org,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: input: Add bindings for Awinic AW8695 haptics
Date: Mon, 11 Apr 2022 14:52:26 +0200 [thread overview]
Message-ID: <60402ff3-db73-5fc0-bc2a-942d664085ec@linaro.org> (raw)
In-Reply-To: <CJ79EIW9Z89J.YZTZ6AU91TGE@otso>
On 11/04/2022 10:15, Luca Weiss wrote:
(...)
>>> + awinic,f0-detection-play-time:
>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>> + description: Drive waveform play times in the first period in the f0 detection
>>
>> Use standard unit suffixes for known units (e.g. time).
>
> While the datasheet doesn't mention any time unit, the value is used to
> calculate the f0_trace_ms variable (which is milliseconds) but the
> result also depends on the awinic,f0-preset value, so it's not a raw
> time value.
I see, ok.
>
>>
>>> +
>>> + awinic,f0-detection-wait-time:
>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>> + description: Waveform wait times in the f0 detection
>>
>> Ditto.
>>
>>> +
>>> + awinic,f0-detection-repeat:
>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>> + description: Repeat times in the f0 detection
>>> +
>>> + awinic,f0-detection-trace:
>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>> + description: Drive waveform play times in the second period and later in the f0 detection
>>> +
>>> + awinic,boost-debug:
>>> + $ref: /schemas/types.yaml#/definitions/uint8-array
>>> + minItems: 3
>>> + maxItems: 3
>>> + description: Values for BSTDBG1-3 registers
>>
>> Do not encode device programming model (registers) into the binding. You
>> need to define it as a property related to hardware itself, not its
>> registers (e.g. boost value in mV).
>
> Unfortunately I couldn't figure the meaning for this and the two values
> below.
>
> The datasheet doesn't mention these registers at all and the downstream
> driver doesn't do anything meaningful with them (other than setting them)
> nor has any comment to indicate what they do.
> In the datasheet there's only BSTDBG4 mentioned where bits [5:1] mean
> PVDD output voltage setting so for these registers it could really be
> anthing :(
>
> Maybe someone with more knowledge about LRAs might be able to decipher
> what tset and r_spare is at least? I unfortunately didn't manage.
Do you have to define them in such case in DT? Maybe it should be part
of driver?
Best regards,
Krzysztof
next prev parent reply other threads:[~2022-04-11 12:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-08 11:53 [PATCH 1/3] dt-bindings: input: Add bindings for Awinic AW8695 haptics Luca Weiss
2022-04-08 11:53 ` [PATCH 2/3] Input - aw8695: Add driver for " Luca Weiss
2022-04-08 17:25 ` kernel test robot
2022-04-09 21:15 ` Jeff LaBundy
2022-04-11 9:57 ` Luca Weiss
2022-04-12 2:44 ` Jeff LaBundy
2022-04-08 11:53 ` [PATCH 3/3] arm64: dts: qcom: sm7225-fairphone-fp4: Add " Luca Weiss
2022-04-08 19:49 ` kernel test robot
2022-04-08 15:05 ` [PATCH 1/3] dt-bindings: input: Add bindings for Awinic " Krzysztof Kozlowski
2022-04-11 8:15 ` Luca Weiss
2022-04-11 12:52 ` Krzysztof Kozlowski [this message]
2022-04-11 15:11 ` Luca Weiss
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