Re: [PATCH v4] drm/i915/hwmon: expose fan speed

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Hi Badal,

> > +static int
> > +hwm_fan_read(struct hwm_drvdata *ddat, u32 attr, long *val)
> > +{
> > +	struct i915_hwmon *hwmon = ddat->hwmon;
> > +	struct hwm_fan_info *fi = &ddat->fi;
> > +	u32 reg_val, pulses, time, time_now;
> > +	intel_wakeref_t wakeref;
> > +	long rotations;
> > +	int ret = 0;
> > +
> > +	if (attr != hwmon_fan_input)
> > +		return -EOPNOTSUPP;
> Using a switch case in rev3 is more logical here. It will also simplify
> adding more fan attributes in the future. This is why switch cases are used
> in other parts of the file.

it was my suggestion and to be honest I would rather prefer it
this way. I can understand it if we were expecting more cases in
the immediate, like it was in your case.

But I wouldn't have an ugly and unreadable one-case-switch in the
eventuality that something comes in the future. In that case, we
can always convert it.

Thanks,
Andi




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