Hi Lee,
On Tue, Mar 28, 2017 at 11:27:16AM +0100, Lee Jones wrote:
> > +int cpcap_sense_virq(struct regmap *regmap, int virq)
> > +{
> > + struct regmap_irq_chip_data *d = irq_get_chip_data(virq);
> > + int base = regmap_irq_chip_get_base(d);
>
> What base is this?
This function takes an Linux irq number. That number is a virtual
irq number, which has nothing to do with the hardware. For example
a platform could look like this:
linux irq device base device irq
---------------------------------------------
0-63 SoC 0 0-63
64-127 SoC-GPIO 64 0-63
128-191 CPCAP 128 0-63
For the above example the function would map 128-191 to 0-63 as
used by the device.
> Could it be used to avoid some calculations in cpcap_sense_irq()?
No.
> > + return cpcap_sense_irq(regmap, virq - base);
> > +}
> > +EXPORT_SYMBOL_GPL(cpcap_sense_virq);
-- Sebastian
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