Re: [PATCH v5 2/4] iio: accel: adxl345: Use I2C regmap instead of direct I2C access

[Eva Rachel Retuya]

On Fri, Mar 03, 2017 at 06:44:27PM +0200, Andy Shevchenko wrote:
> On Tue, Feb 28, 2017 at 4:37 AM, Eva Rachel Retuya <eraretuya@xxxxxxxxx> wrote:
> > Convert the driver to use regmap instead of I2C-specific functions. This
> > is done in preparation for splitting this driver into core and
> > I2C-specific code as well as introduction of SPI driver.
> >
> > Signed-off-by: Eva Rachel Retuya <eraretuya@xxxxxxxxx>
> > Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> 
> Okay, my another set of comments.
> > @@ -70,6 +76,7 @@ static int adxl345_read_raw(struct iio_dev *indio_dev,
> >  {
> >         struct adxl345_data *data = iio_priv(indio_dev);
> 
> >         int ret;
> > +       __le16 regval;
> 
> Reverse tree order, please.
> 
>      __le16 regval;
>      int ret;
> 

Ack.

> > @@ -104,37 +112,50 @@ static int adxl345_probe(struct i2c_client *client,
> >  {
> >         struct adxl345_data *data;
> >         struct iio_dev *indio_dev;
> > +       struct device *dev;
> > +       struct regmap *regmap;
> 
> >         int ret;
> > +       u32 regval;
> 
> Ditto.
> 
> > +
> > +       regmap = devm_regmap_init_i2c(client, &adxl345_regmap_config);
> > +       if (IS_ERR(regmap)) {
> > +               dev_err(&client->dev, "Error initializing regmap: %d\n",
> > +                       (int)PTR_ERR(regmap));
> 
> I don't like explicit casting in such cases at all. Why not to use
> %ld? Same for the similar places in the series.
> 

OK. Will do that instead.

> > -       if (ret != ADXL345_DEVID) {
> > -               dev_err(&client->dev, "Invalid device ID: %d\n", ret);
> > +       if (regval != ADXL345_DEVID) {
> > +               dev_err(dev, "Invalid device ID: %x, expected %x\n",
> > +                       regval, ADXL345_DEVID);
> 
> So, originally it was in decimal form. Does hex looks better or what
> is behind the change?

Yes it looks better. I made the change to make it easily seen what it
read in hex compared to the known DEVID.

Thanks,
Eva

> 
> -- 
> With Best Regards,
> Andy Shevchenko