linux-kernel - Re: [PATCH v2 2/2] Input: pm8xxx-vib

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Date:   Tue, 18 Jul 2023 09:44:07 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Fenglin Wu <quic_fenglinw@...cinc.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...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>,
        linux-input@...r.kernel.org, quic_collinsd@...cinc.com,
        quic_subbaram@...cinc.com, quic_kamalw@...cinc.com,
        jestar@....qualcomm.com
Subject: Re: [PATCH v2 2/2] Input: pm8xxx-vib - Add support for more PMICs

On Tue, 18 Jul 2023 at 09:27, Fenglin Wu <quic_fenglinw@...cinc.com> wrote:
>
> Add support for vibrator module inside PMI632, PM7250B, PM7325B.
> It is very similar to vibrator inside PM8xxx but just the drive
> amplitude is controlled through 2 bytes registers.
>
> Signed-off-by: Fenglin Wu <quic_fenglinw@...cinc.com>
> ---
>  drivers/input/misc/pm8xxx-vibrator.c | 48 ++++++++++++++++++++++++++++
>  1 file changed, 48 insertions(+)
>
> diff --git a/drivers/input/misc/pm8xxx-vibrator.c b/drivers/input/misc/pm8xxx-vibrator.c
> index 04cb87efd799..213fdfd47c7f 100644
> --- a/drivers/input/misc/pm8xxx-vibrator.c
> +++ b/drivers/input/misc/pm8xxx-vibrator.c
> @@ -25,6 +25,9 @@ struct pm8xxx_regs {
>         unsigned int drv_addr;
>         unsigned int drv_mask;
>         unsigned int drv_shift;
> +       unsigned int drv_addr2;
> +       unsigned int drv_mask2;
> +       unsigned int drv_shift2;
>         unsigned int drv_en_manual_mask;
>  };
>
> @@ -44,6 +47,42 @@ static struct pm8xxx_regs pm8916_regs = {
>         .drv_en_manual_mask = 0,
>  };
>
> +static struct pm8xxx_regs pmi632_regs = {
> +       .enable_addr = 0x5746,
> +       .enable_mask = BIT(7),
> +       .drv_addr = 0x5740,
> +       .drv_mask = 0xff,
> +       .drv_shift = 0,
> +       .drv_addr2 = 0x5741,
> +       .drv_mask2 = 0x0f,
> +       .drv_shift2 = 8,

I see that you are just expanding what was done for SSBI PMICs and
later expanded to support pm8916. However it might be better to drop
the hardcoded .drv_addr (and drv_addr2) and read address from DT
instead.

> +       .drv_en_manual_mask = 0,
> +};
> +
> +static struct pm8xxx_regs pm7250b_regs = {
> +       .enable_addr = 0x5346,
> +       .enable_mask = BIT(7),
> +       .drv_addr = 0x5340,
> +       .drv_mask = 0xff,
> +       .drv_shift = 0,
> +       .drv_addr2 = 0x5341,
> +       .drv_mask2 = 0x0f,
> +       .drv_shift2 = 8,
> +       .drv_en_manual_mask = 0,
> +};
> +
> +static struct pm8xxx_regs pm7325b_regs = {
> +       .enable_addr = 0xdf46,
> +       .enable_mask = BIT(7),
> +       .drv_addr = 0xdf40,
> +       .drv_mask = 0xff,
> +       .drv_shift = 0,
> +       .drv_addr2 = 0xdf41,
> +       .drv_mask2 = 0x0f,
> +       .drv_shift2 = 8,
> +       .drv_en_manual_mask = 0,
> +};
> +
>  /**
>   * struct pm8xxx_vib - structure to hold vibrator data
>   * @vib_input_dev: input device supporting force feedback
> @@ -87,6 +126,12 @@ static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
>                 return rc;
>
>         vib->reg_vib_drv = val;
> +       if (regs->drv_addr2 != 0 && on) {
> +               val = (vib->level << regs->drv_shift2) & regs->drv_mask2;
> +               rc = regmap_write(vib->regmap, regs->drv_addr2, val);
> +               if (rc < 0)
> +                       return rc;
> +       }
>
>         if (regs->enable_mask)
>                 rc = regmap_update_bits(vib->regmap, regs->enable_addr,
> @@ -242,6 +287,9 @@ static const struct of_device_id pm8xxx_vib_id_table[] = {
>         { .compatible = "qcom,pm8058-vib", .data = &pm8058_regs },
>         { .compatible = "qcom,pm8921-vib", .data = &pm8058_regs },
>         { .compatible = "qcom,pm8916-vib", .data = &pm8916_regs },
> +       { .compatible = "qcom,pmi632-vib", .data = &pmi632_regs },
> +       { .compatible = "qcom,pm7250b-vib", .data = &pm7250b_regs },
> +       { .compatible = "qcom,pm7325b-vib", .data = &pm7325b_regs },
>         { }
>  };
>  MODULE_DEVICE_TABLE(of, pm8xxx_vib_id_table);
> --
> 2.25.1
>


-- 
With best wishes
Dmitry