Re: [PATCH v5 4/5] power: supply: Add support for mps mp2629 battery charger

[saravanan sekar]

Hi Andy,

On 28/03/20 12:02 pm, Andy Shevchenko wrote:
> On Sat, Mar 28, 2020 at 2:12 AM Saravanan Sekar <sravanhome@xxxxxxxxx> wrote:
> > The mp2629 provides switching-mode battery charge management for
> > single-cell Li-ion or Li-polymer battery. Driver supports the
> > access/control input source and battery charging parameters.
> ...
>
> > +#include <linux/module.h>
> > +#include <linux/of_device.h>
> Missed header bits.h.
>
> ...
>
> > +       ret = iio_read_channel_processed(charger->iiochan[ch], &chval);
> > +       if (ret < 0)
> Is it possible to get positive returned value?
Really not for processed
> > +               return ret;
> ...
>
> > +       val->intval = (rval * props[fld].step) + props[fld].min;
> Too many parentheses.
>
> ...
>
> > +       return ((psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) ||
> > +               (psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) ||
> > +               (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
> > +               (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE));
> Ditto.
I think I misunderstood you previous review comment "Redundant 
parentheses", no sure what is the expectation
> ...
>
> > +       return ((psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) ||
> > +               (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT));
> Ditto.
>
> ...
>
> > +       return sprintf(buf, "%d mohm\n", rval);
> Hmm... For units we usually have separate node, but it is up to
> maintainer, I dunno what the common practice is there.
>
> ...
>
> > +       int val;
> > +       int ret;
> > +
> > +       ret = kstrtoint(buf, 10, &val);
> > +       if (ret)
> > +               return ret;
> > +
> > +       if (val < 0 && val > 140)
> What the point to convert negative values in the first place? kstrtouint()
Done
> > +               return -ERANGE;
> ...
>
> > +       struct power_supply_config psy_cfg = {NULL};
> { 0 }
NULL to make compiler happy.