linux-kernel - Re: [PATCH v2 2/6] soc: mediatek: pwrap: Move PMIC read test sequence in function

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Message-ID: <CAFGrd9oyOz8-gf10-1QkaBzZwTvm9V7b63BZeoUbbM45CO8E1Q@mail.gmail.com>
Date:   Tue, 28 Mar 2023 11:19:52 +0200
From:   Alexandre Mergnat <amergnat@...libre.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, flora.fu@...iatek.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, kernel@...labora.com,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v2 2/6] soc: mediatek: pwrap: Move PMIC read test sequence
 in function

Le ven. 24 mars 2023 à 10:42, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> a écrit :
>
> The PMIC read test is performed in two places: pwrap_init_dual_io()
> and pwrap_init_sidly().
> In preparation for adding support for PMICs requiring a companion
> part, move this sequence to a new function pwrap_pmic_read_test().
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  drivers/soc/mediatek/mtk-pmic-wrap.c | 32 +++++++++++++++++-----------
>  1 file changed, 20 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index 15789a03e6c6..5c500be48f7c 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -1455,6 +1455,18 @@ static int pwrap_regmap_write(void *context, u32 adr, u32 wdata)
>         return pwrap_write(context, adr, wdata);
>  }
>
> +static bool pwrap_pmic_read_test(struct pmic_wrapper *wrp, const u32 *dew_regs,
> +                                u16 read_test_val)
> +{
> +       bool is_success;
> +       u32 rdata;
> +
> +       pwrap_read(wrp, dew_regs[PWRAP_DEW_READ_TEST], &rdata);
> +       is_success = ((rdata & U16_MAX) == read_test_val);
> +
> +       return is_success;
> +}
> +
>  static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
>  {
>         bool tmp;
> @@ -1498,18 +1510,18 @@ static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
>   */
>  static int pwrap_init_sidly(struct pmic_wrapper *wrp)
>  {
> -       u32 rdata;
>         u32 i;
>         u32 pass = 0;
> +       bool read_ok;
>         signed char dly[16] = {
>                 -1, 0, 1, 0, 2, -1, 1, 1, 3, -1, -1, -1, 3, -1, 2, 1
>         };
>
>         for (i = 0; i < 4; i++) {
>                 pwrap_writel(wrp, i, PWRAP_SIDLY);
> -               pwrap_read(wrp, wrp->slave->dew_regs[PWRAP_DEW_READ_TEST],
> -                          &rdata);
> -               if (rdata == PWRAP_DEW_READ_TEST_VAL) {
> +               read_ok = pwrap_pmic_read_test(wrp, wrp->slave->dew_regs,
> +                                              PWRAP_DEW_READ_TEST_VAL);
> +               if (read_ok) {
>                         dev_dbg(wrp->dev, "[Read Test] pass, SIDLY=%x\n", i);
>                         pass |= 1 << i;
>                 }
> @@ -1529,8 +1541,7 @@ static int pwrap_init_sidly(struct pmic_wrapper *wrp)
>  static int pwrap_init_dual_io(struct pmic_wrapper *wrp)
>  {
>         int ret;
> -       bool tmp;
> -       u32 rdata;
> +       bool read_ok, tmp;
>
>         /* Enable dual IO mode */
>         pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_DIO_EN], 1);
> @@ -1546,12 +1557,9 @@ static int pwrap_init_dual_io(struct pmic_wrapper *wrp)
>         pwrap_writel(wrp, 1, PWRAP_DIO_EN);
>
>         /* Read Test */
> -       pwrap_read(wrp,
> -                  wrp->slave->dew_regs[PWRAP_DEW_READ_TEST], &rdata);
> -       if (rdata != PWRAP_DEW_READ_TEST_VAL) {
> -               dev_err(wrp->dev,
> -                       "Read failed on DIO mode: 0x%04x!=0x%04x\n",
> -                       PWRAP_DEW_READ_TEST_VAL, rdata);
> +       read_ok = pwrap_pmic_read_test(wrp, wrp->slave->dew_regs, PWRAP_DEW_READ_TEST_VAL);
> +       if (!read_ok) {
> +               dev_err(wrp->dev, "Read failed on DIO mode.\n");
>                 return -EFAULT;
>         }

Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>

Regards,
Alexandre