linux-kernel - Re: [PATCH v8 08/10] mfd: mt6360: Fix flow which is used to check ic exist

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Date:   Wed, 9 Jun 2021 18:21:21 +0800
From:   Fei Shao <fshao@...omium.org>
To:     Gene Chen <gene.chen.richtek@...il.com>
Cc:     lee.jones@...aro.org, Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        gene_chen@...htek.com, Wilma.Wu@...iatek.com,
        shufan_lee@...htek.com, cy_huang@...htek.com
Subject: Re: [PATCH v8 08/10] mfd: mt6360: Fix flow which is used to check ic exist

On Wed, Jun 9, 2021 at 6:02 PM Fei Shao <fshao@...omium.org> wrote:
>
> On Tue, May 18, 2021 at 1:36 AM Gene Chen <gene.chen.richtek@...il.com> wrote:
> >
> > From: Gene Chen <gene_chen@...htek.com>
> >
> > Fix flow which is used to check ic exist.
> >
> > Signed-off-by: Gene Chen <gene_chen@...htek.com>
> > Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>
> > ---
> >  drivers/mfd/mt6360-core.c | 32 +++++++++++++++++++++-----------
> >  1 file changed, 21 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/mfd/mt6360-core.c b/drivers/mfd/mt6360-core.c
> > index 50a170065a98..cdd99770f94a 100644
> > --- a/drivers/mfd/mt6360-core.c
> > +++ b/drivers/mfd/mt6360-core.c
> > @@ -293,6 +293,25 @@ static const struct mfd_cell mt6360_devs[] = {
> >                     NULL, 0, 0, "mediatek,mt6360-tcpc"),
> >  };
> >
> > +static int mt6360_check_vendor_info(struct mt6360_ddata *ddata)
> > +{
> > +       u32 info;
> > +       int ret;
> > +
> > +       ret = regmap_read(ddata->regmap, MT6360_PMU_DEV_INFO, &info);
> > +       if (ret < 0)
>
> A dev_err() to indicate the read info error? (it used to be there)

Oops sorry I didn't realize that the patches are applied. Will send
another one for the minor fixes.

>
> > +               return ret;
> > +
> > +       if ((info & CHIP_VEN_MASK) != CHIP_VEN_MT6360) {
> > +               dev_err(ddata->dev, "Device not supported\n");
> > +               return -ENODEV;
> > +       }
> > +
> > +       ddata->chip_rev = info & CHIP_REV_MASK;
> > +
> > +       return 0;
> > +}
> > +
> >  static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] = {
> >         MT6360_PMU_SLAVEID,
> >         MT6360_PMIC_SLAVEID,
> > @@ -303,7 +322,6 @@ static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] = {
> >  static int mt6360_probe(struct i2c_client *client)
> >  {
> >         struct mt6360_ddata *ddata;
> > -       unsigned int reg_data;
> >         int i, ret;
> >
> >         ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
> > @@ -319,17 +337,9 @@ static int mt6360_probe(struct i2c_client *client)
> >                 return PTR_ERR(ddata->regmap);
> >         }
> >
> > -       ret = regmap_read(ddata->regmap, MT6360_PMU_DEV_INFO, &reg_data);
> > -       if (ret) {
> > -               dev_err(&client->dev, "Device not found\n");
> > +       ret = mt6360_check_vendor_info(ddata);
> > +       if (ret)
> >                 return ret;
> > -       }
> > -
> > -       ddata->chip_rev = reg_data & CHIP_REV_MASK;
> > -       if (ddata->chip_rev != CHIP_VEN_MT6360) {
> > -               dev_err(&client->dev, "Device not supported\n");
> > -               return -ENODEV;
> > -       }
> >
> >         ret = devm_regmap_add_irq_chip(&client->dev, ddata->regmap, client->irq,
> >                                        0, 0, &mt6360_irq_chip,
> > --
> > 2.25.1
> >
> >
> > _______________________________________________
> > Linux-mediatek mailing list
> > Linux-mediatek@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-mediatek

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