On Wed, 3 May 2023 05:11:53 +0000
"Vaittinen, Matti" <Matti.Vaittinen@xxxxxxxxxxxxxxxxx> wrote:
> Hi Andy
>
> Thanks for the review.
>
> On 5/2/23 23:40, Andy Shevchenko wrote:
> > On Wed, Apr 26, 2023 at 11:08:17AM +0300, Matti Vaittinen wrote:
> >> The ROHM BU27008 is a sensor with 5 photodiodes (red, green, blue, clear
> >> and IR) with four configurable channels. Red and green being always
> >> available and two out of the rest three (blue, clear, IR) can be
> >> selected to be simultaneously measured. Typical application is adjusting
> >> LCD backlight of TVs, mobile phones and tablet PCs.
> >>
> >> Add initial support for the ROHM BU27008 color sensor.
> >> - raw_read() of RGB and clear channels
> >> - triggered buffer w/ DRDY interrtupt
> >
> > ...
> >
> >> +enum {
> >> + BU27008_RED, /* Always data0 */
> >> + BU27008_GREEN, /* Always data1 */
> >> + BU27008_BLUE, /* data2, configurable (blue / clear) */
> >> + BU27008_CLEAR, /* data2 or data3 */
> >> + BU27008_IR, /* data3 */
> >> + BU27008_NUM_CHANS
> >
> > Why not converting comments to a kernel-doc?
> >
> >> +};
> >> +
> >> +enum {
> >> + BU27008_DATA0, /* Always RED */
> >> + BU27008_DATA1, /* Always GREEN */
> >> + BU27008_DATA2, /* Blue or Clear */
> >> + BU27008_DATA3, /* IR or Clear */
> >> + BU27008_NUM_HW_CHANS
> >> +};
> >
> > Ditto.
>
> I see no value having entities which are not intended to be used outside
> this file documented in any "global" documentation. One who is ever
> going to use these or wonder what these are - will most likely be
> watching this file. My personal view is that the generated docs should
> be kept lean. In my opinion the problem of the day is the time we spend
> looking for a needle hidden in a haystack. In my opinion adding this to
> kernel-doc just adds hay :)
>
> I still can do this if no-one else objects. I almost never look at the
> generated docs myself. Usually I just look the docs from code files -
> and kernel-doc format is not any worse for me to read. Still, I can
> imagine including this type of stuff to generic doc just bloats them and
> my not serve well those who use them.
Unless someone specifically adds this doc to the main docs build, the
kernel-doc won't end up in the docs anyway. It just provides a nice
bit of consistent formatting. Even if they do add this for some reason,
there are controls on internal vs external (exported stuff) being added
to the docs.
>
> >
> > ...
> >
> >> + if (int_time < 0)
> >> + int_time = 400000;
> >
> > Adding 3 0:s to drop them below with a heavy division operation? Well done!
> > Or did I miss anything?
>
> No. You did not miss anything. This can be improved.
>
> >
> >> + msleep(int_time / 1000);
> >
> > USEC_PER_MSEC ?
>
> Ok.
>
> > ...
> >
> >> + ret = devm_iio_device_register(dev, idev);
> >> + if (ret)
> >> + return dev_err_probe(dev, ret,
> >> + "Unable to register iio device\n");
> >> +
> >> + return ret;
> >
> > return 0 will suffice.
>
> Ok.
>
> Thanks,
> -- Matti
>
