linux-kernel - Re: [PATCH v9 3/5] mfd: Add support for the MediaTek MT6358 PMIC

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Message-ID: <1583898520.17060.1.camel@mtksdaap41>
Date:   Wed, 11 Mar 2020 11:48:40 +0800
From:   Hsin-hsiung Wang <hsin-hsiung.wang@...iatek.com>
To:     Nicolas Boichat <drinkcat@...omium.org>
CC:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Sean Wang <sean.wang@...iatek.com>,
        Sebastian Reichel <sre@...nel.org>,
        Eddie Huang <eddie.huang@...iatek.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        "Frank Wunderlich" <frank-w@...lic-files.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Richard Fontana <rfontana@...hat.com>,
        Josef Friedl <josef.friedl@...ed.at>,
        Ran Bi <ran.bi@...iatek.com>,
        Devicetree List <devicetree@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        "open list:THERMAL" <linux-pm@...r.kernel.org>,
        <linux-rtc@...r.kernel.org>,
        srv_heupstream <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v9 3/5] mfd: Add support for the MediaTek MT6358 PMIC

Hi,
Thanks for the review.
I will fix the mistake in the next version.

On Wed, 2020-03-11 at 11:24 +0800, Nicolas Boichat wrote:
> Thanks, much better. Just one issue left.
> 
> On Tue, Mar 10, 2020 at 6:10 PM Hsin-Hsiung Wang
> <hsin-hsiung.wang@...iatek.com> wrote:
> >
> > This adds support for the MediaTek MT6358 PMIC. This is a
> > multifunction device with the following sub modules:
> >
> > - Regulator
> > - RTC
> > - Codec
> > - Interrupt
> >
> > It is interfaced to the host controller using SPI interface
> > by a proprietary hardware called PMIC wrapper or pwrap.
> > MT6358 MFD is a child device of the pwrap.
> >
> > Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
> > ---
> >  drivers/mfd/Makefile                 |   2 +-
> >  drivers/mfd/mt6358-irq.c             | 238 +++++++++++++++++++++++++++++
> >  drivers/mfd/mt6397-core.c            |  55 ++++++-
> >  include/linux/mfd/mt6358/core.h      | 158 ++++++++++++++++++++
> >  include/linux/mfd/mt6358/registers.h | 282 +++++++++++++++++++++++++++++++++++
> >  include/linux/mfd/mt6397/core.h      |   3 +
> >  6 files changed, 733 insertions(+), 5 deletions(-)
> >  create mode 100644 drivers/mfd/mt6358-irq.c
> >  create mode 100644 include/linux/mfd/mt6358/core.h
> >  create mode 100644 include/linux/mfd/mt6358/registers.h
> >
> > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> > index b83f172..9af1414 100644
> > --- a/drivers/mfd/Makefile
> > +++ b/drivers/mfd/Makefile
> > @@ -238,7 +238,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC)        += intel-soc-pmic.o
> >  obj-$(CONFIG_INTEL_SOC_PMIC_BXTWC)     += intel_soc_pmic_bxtwc.o
> >  obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC)     += intel_soc_pmic_chtwc.o
> >  obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)  += intel_soc_pmic_chtdc_ti.o
> > -mt6397-objs    := mt6397-core.o mt6397-irq.o
> > +mt6397-objs                    := mt6397-core.o mt6397-irq.o mt6358-irq.o
> >  obj-$(CONFIG_MFD_MT6397)       += mt6397.o
> >  obj-$(CONFIG_INTEL_SOC_PMIC_MRFLD)     += intel_soc_pmic_mrfld.o
> >
> > diff --git a/drivers/mfd/mt6358-irq.c b/drivers/mfd/mt6358-irq.c
> > new file mode 100644
> > index 0000000..0b99a39
> > --- /dev/null
> > +++ b/drivers/mfd/mt6358-irq.c
> > @@ -0,0 +1,238 @@
> > [snip]
> > +static irqreturn_t mt6358_irq_handler(int irq, void *data)
> > +{
> > +       struct mt6397_chip *chip = data;
> > +       struct pmic_irq_data *mt6358_irq_data = chip->irq_data;
> > +       unsigned int bit, i, top_irq_status;
> > +       int ret;
> > +
> > +       ret = regmap_read(chip->regmap,
> > +                         mt6358_irq_data->top_int_status_reg,
> > +                         &top_irq_status);
> > +       if (ret) {
> > +               dev_err(chip->dev,
> > +                       "Failed to read status from the device, ret=%d\n", ret);
> > +               return IRQ_NONE;
> > +       }
> > +
> > +       for (i = 0; i < mt6358_irq_data->num_top; i++) {
> > +               for (i = 0; i < mt6358_irq_data->num_top; i++) {
> 
> Only one loop needed.
> 
> > +                       bit = BIT(mt6358_ints[i].top_offset);
> > +                       if (top_irq_status & bit) {
> > +                               mt6358_irq_sp_handler(chip, i);
> > +                               top_irq_status &= ~bit;
> > +                               if (!top_irq_status)
> > +                                       break;
> > +                       }
> > +               }
> > +       }
> > +
> > +       return IRQ_HANDLED;
> > +}
> > +
> > +static int pmic_irq_domain_map(struct irq_domain *d, unsigned int irq,
> > +                              irq_hw_number_t hw)
> > +{
> > +       struct mt6397_chip *mt6397 = d->host_data;
> > +
> > +       irq_set_chip_data(irq, mt6397);
> > +       irq_set_chip_and_handler(irq, &mt6358_irq_chip, handle_level_irq);
> > +       irq_set_nested_thread(irq, 1);
> > +       irq_set_noprobe(irq);
> > +
> > +       return 0;
> > +}
> > [snip]