On Thu, 16 Mar 2017, Charles Keepax wrote:
> On Thu, Mar 16, 2017 at 02:00:19PM +0000, Lee Jones wrote:
> > On Wed, 15 Mar 2017, Charles Keepax wrote:
> >
> > > Add the basic ability to register the device through device tree, more
> > > work is needed to get each individual sub-driver functioning correctly
> > > but this is enough to get the device to probe from device tree.
> > >
> > > Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > > ---
> > > static int wm831x_i2c_probe(struct i2c_client *i2c,
> > > const struct i2c_device_id *id)
> > > {
> > > + struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
> > > struct wm831x *wm831x;
> > > + enum wm831x_parent type;
> > > int ret;
> > >
> > > + if (i2c->dev.of_node) {
> > > + const struct of_device_id *id = of_match_device(wm831x_of_match,
> > > + &i2c->dev);
> >
> > Not keen on this. Please declare the variable up with the others.
> >
>
> They are never going to be used anywhere else in the function.
> Again I can if you feel strongly but isn't it really better to
> limit the scope of the variables if they are only being used
> locally.
I understand the motivation, but if we did that all the time, the code
would look pretty dire IMHO.
> > > + unsigned long of_type = (unsigned long)id->data;
> >
> > And this one.
> >
> > > + type = (enum wm831x_parent)of_type;
> >
> > Looks like you don't even need of_type.
> >
> > Just cast id->data straight into wm81x_parent.
>
> Pretty sure you will get a warning on 64-bit systems if I do
> that.
What makes you think that?
> > > + } else {
> > > + type = (enum wm831x_parent)id->driver_data;
> > > + }
> >
> > No need for bracketing here.
> >
>
> Kernel coding standards if one side of the if has both should.
Yes, my bad. I retract this one.
/me has been working on Zephyr too much recently (where *everything*
has to be bracketed -- I guess I'm getting a bit sensitive to
over-bracketing) :)
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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