RE: [Patch v1 4/7] DA9055 GPIO driver

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> -----Original Message-----
> From: Linus Walleij [mailto:linus.walleij@xxxxxxxxxx]
> Sent: Friday, September 14, 2012 7:44 PM
> To: Ashish Jangam; Mark Brown
> Cc: Grant Likely; Samuel Ortiz; linux-input@xxxxxxxxxxxxxxx; David Dajun
> Chen
> Subject: Re: [Patch v1 4/7] DA9055 GPIO driver
> 
> On Fri, Sep 14, 2012 at 3:30 PM, Ashish Jangam
> <ashish.jangam@xxxxxxxxxxxxxxx> wrote:
> 
> > This is the GPIO patch for the DA9055 PMIC. This patch has got
> > dependency on the DA9055 MFD core.
> >
> > This patch is functionally tested on SMDK6410 board.
> >
> > Signed-off-by: David Dajun Chen <dchen@xxxxxxxxxxx>
> > Signed-off-by: Ashish Jangam <ashish.jangam@xxxxxxxxxxxxxxx>
> 
> This looks OK
> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> 
> But I want Marks comment on this, for example:
> 
> > +static int da9055_gpio_get(struct gpio_chip *gc, unsigned offset)
> > +{
> > +       struct da9055_gpio *gpio = to_da9055_gpio(gc);
> > +       int gpio_direction = 0;
> > +       int ret;
> > +
> > +       /* Get GPIO direction */
> > +       ret = da9055_reg_read(gpio->da9055, (offset >> 1) +
> DA9055_REG_GPIO0_1);
> > +       if (ret < 0)
> > +               return ret;
> 
> So unique functions to read/write registers (as I'm used to).
> 
> But the parent driver is using regmap, sand you seem not to use the
> struct da9055
> for anything else than passing reads/writes, so isn't it simpler to just
> pass
> the struct regmap * and use update_bits etc directly and remove a layer of
> indirection?
> 
> I'm very uncertain but Mark will know the proper design pattern.
> 
As Mark was fine with this then will it be possible to upstream this patch?

> Yours,
> Linus Walleij


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