linux-kernel - Re: [PATCH RESEND v7 0/3] Add support for vibrator in multiple PMICs

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Date:   Wed, 29 Nov 2023 12:22:06 +0800
From:   Fenglin Wu <quic_fenglinw@...cinc.com>
To:     <linux-arm-msm@...r.kernel.org>, Andy Gross <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <quic_collinsd@...cinc.com>,
        <quic_subbaram@...cinc.com>, <quic_kamalw@...cinc.com>,
        <jestar@....qualcomm.com>, Luca Weiss <luca.weiss@...rphone.com>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH RESEND v7 0/3] Add support for vibrator in multiple PMICs

Hi Dmitry Torokhov,

Can you help to review the series of the changes?
I knew that you left comment in patch V6 about moving shift and mask 
into a chip-specific data structure to avoid defining 'hw_type'. 
Actually 'hw_type' is added here to differentiate the SSBI vibrator 
module which doesn't need to read the base address from the DT and add 
it up in register read/write access, while SPMI vibrators in different 
PMICs may be the same HW but just with different base address, and we 
can use device compatibles instead of adding the chip-specific data 
structure for each of them by just updating the base address. See 
discussion here for more details:
https://lore.kernel.org/linux-arm-msm/20230718062639.2339589-3-quic_fenglinw@quicinc.com/

I also responded here that having 'hw_type' would help us with a cleaner 
code logic instead of checking specific reg/mask for particular 
operations: 
https://lore.kernel.org/linux-arm-msm/8697d115-9aa7-2a1c-4d96-25b15adb5cca@quicinc.com/

Let me know what's your final suggestion, if you insist that I should 
move the reg/mask/shift in the chip-specific data structure, I can 
update it even it won't be as clean as what it looks right now.
Thanks

Fenglin

On 11/8/2023 3:36 PM, Fenglin Wu via B4 Relay wrote:
> Add SW support for the vibrator module inside PMI632, PM7250B, PM7325B, PM7550BA.
> It is very similar to the vibrator module inside PM8916 which is supported in
> pm8xxx-vib driver but just the drive amplitude is controlled with 2 registers,
> and the register base offset in each PMIC is different.
> 
> Changes in v7;
>    1. Fix a typo: SSBL_VIB_DRV_REG --> SSBI_VIB_DRV_REG
>    2. Move the hw_type switch case in pm8xxx_vib_set() to the refactoring
>       change.
> 
> Changes in v6:
>    1. Add "qcom,pmi632-vib" as a standalone compatible string.
> 
> Changes in v5:
>    1. Drop "qcom,spmi-vib-gen2" generic compatible string as requested
>       and use device specific compatible strings only.
> 
> Changes in v4:
>    1. Update to use the combination of the HW type and register offset
>       as the constant match data, the register base address defined in
>       'reg' property will be added when accessing SPMI registers using
>       regmap APIs.
>    2. Remove 'qcom,spmi-vib-gen1' generic compatible string.
> 
> Changes in v3:
>    1. Refactor the driver to support different type of the vibrators with
>      better flexibility by introducing the HW type with corresponding
>      register fields definitions.
>    2. Add 'qcom,spmi-vib-gen1' and 'qcom,spmi-vib-gen2' compatible
>      strings, and add PMI632, PM7250B, PM7325B, PM7550BA as compatbile as
>      spmi-vib-gen2.
> 
> Changes in v2:
>    Remove the "pm7550ba-vib" compatible string as it's compatible with pm7325b.
> 
> Fenglin Wu (3):
>    input: pm8xxx-vib: refactor to easily support new SPMI vibrator
>    dt-bindings: input: qcom,pm8xxx-vib: add new SPMI vibrator module
>    input: pm8xxx-vibrator: add new SPMI vibrator support
> 
>   .../bindings/input/qcom,pm8xxx-vib.yaml       |  16 +-
>   drivers/input/misc/pm8xxx-vibrator.c          | 171 ++++++++++++------
>   2 files changed, 132 insertions(+), 55 deletions(-)
> 
> --
> 2.25.1
> 
> ---
> Fenglin Wu (3):
>        input: pm8xxx-vib: refactor to easily support new SPMI vibrator
>        dt-bindings: input: qcom,pm8xxx-vib: add new SPMI vibrator module
>        input: pm8xxx-vibrator: add new SPMI vibrator support
> 
>   .../devicetree/bindings/input/qcom,pm8xxx-vib.yaml |  16 +-
>   drivers/input/misc/pm8xxx-vibrator.c               | 170 ++++++++++++++-------
>   2 files changed, 131 insertions(+), 55 deletions(-)
> ---
> base-commit: 650cda2ce25f08e8fae391b3ba6be27e7296c6a5
> change-id: 20230925-pm8xxx-vibrator-62df3df46a6c
> 
> Best regards,