linux-kernel - Re: [PATCH v3 1/6] mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

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Date:   Wed, 2 Jun 2021 13:53:26 +0200
From:   Robert Marko <robert.marko@...tura.hr>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>, robh+dt@...nel.org,
        devicetree@...r.kernel.org, Luka Perkov <luka.perkov@...tura.hr>,
        jmp@...phyte.org, Paul Menzel <pmenzel@...gen.mpg.de>,
        Donald Buczek <buczek@...gen.mpg.de>
Subject: Re: [PATCH v3 1/6] mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

On Wed, Jun 2, 2021 at 12:49 PM Lee Jones <lee.jones@...aro.org> wrote:
>
> On Mon, 31 May 2021, Robert Marko wrote:
> 65;6200;1c
> > Delta TN48M switches have a Lattice CPLD that serves
> > multiple purposes including being a GPIO expander.
> >
> > So, lets use the simple I2C MFD driver to provide the MFD core.
> >
> > Also add a virtual symbol which pulls in the simple-mfd-i2c driver and
> > provide a common symbol on which the subdevice drivers can depend on.
> >
> > Signed-off-by: Robert Marko <robert.marko@...tura.hr>
> > ---
> > Changes in v2:
> > * Drop the custom MFD driver and header
> > * Use simple I2C MFD driver
> >
> >  drivers/mfd/Kconfig          | 10 ++++++++++
> >  drivers/mfd/simple-mfd-i2c.c |  1 +
> >  2 files changed, 11 insertions(+)
> >
> > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> > index b74efa469e90..2b5ad314125d 100644
> > --- a/drivers/mfd/Kconfig
> > +++ b/drivers/mfd/Kconfig
> > @@ -297,6 +297,16 @@ config MFD_ASIC3
> >         This driver supports the ASIC3 multifunction chip found on many
> >         PDAs (mainly iPAQ and HTC based ones)
> >
> > +config MFD_TN48M_CPLD
> > +     tristate "Delta Networks TN48M switch CPLD driver"
> > +     depends on I2C
> > +     select MFD_SIMPLE_MFD_I2C
> > +     help
> > +       Select this option to enable support for Delta Networks TN48M switch
> > +       CPLD. It consists of MFD and GPIO drivers. CPLD provides GPIOS-s
>
> Not entirely sure what MFD means in this context.
>
> Please replace the MFD mention with Reset.
Sure, that is a leftover from before.

>
> > +       for the SFP slots as well as power supply related information.
> > +       SFP support depends on the GPIO driver being selected.
> > +
> >  config PMIC_DA903X
> >       bool "Dialog Semiconductor DA9030/DA9034 PMIC Support"
> >       depends on I2C=y
> > diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
> > index 87f684cff9a1..af8e91781417 100644
> > --- a/drivers/mfd/simple-mfd-i2c.c
> > +++ b/drivers/mfd/simple-mfd-i2c.c
> > @@ -39,6 +39,7 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c)
> >
> >  static const struct of_device_id simple_mfd_i2c_of_match[] = {
> >       { .compatible = "kontron,sl28cpld" },
> > +     { .compatible = "delta,tn48m-cpld" },
> >       {}
> >  };
> >  MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
>
> Once fixed, please apply my:
>
> For my own reference (apply this as-is to your sign-off block):
>
>   Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>

Sure, will do.
Regards,
Robert
>
> --
> Lee Jones [李琼斯]
> Senior Technical Lead - Developer Services
> Linaro.org │ Open source software for Arm SoCs
> Follow Linaro: Facebook | Twitter | Blog



-- 
Robert Marko
Staff Embedded Linux Engineer
Sartura Ltd.
Lendavska ulica 16a
10000 Zagreb, Croatia
Email: robert.marko@...tura.hr
Web: www.sartura.hr