Re: [PATCH v3 2/3] gpiolib: Support 'gpio-reserved-ranges' property

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Quoting Andy Shevchenko (2018-03-21 10:59:10)
> On Wed, 2018-03-21 at 09:58 -0700, Stephen Boyd wrote:
> > From: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> > 
> > Some qcom platforms make some GPIOs or pins unavailable for use by
> > non-secure operating systems, and thus reading or writing the
> > registers
> > for those pins will cause access control issues. Add support for a DT
> > property to describe the set of GPIOs that are available for use so
> > that
> > higher level OSes are able to know what pins to avoid reading/writing.
> > Non-DT platforms can add support by directly updating the
> > chip->valid_mask.
> 
> > Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> > Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
> 
> Hmm...

Don't look closely! :P

> 
> > +     gpiochip->valid_mask = kcalloc(BITS_TO_LONGS(gpiochip-
> > >ngpio),
> > +                                    sizeof(long), GFP_KERNEL);
> 
> Just noticed that kcalloc is superfluous here.
> kmalloc_array() would be enough.
> 

Ok. I was copying the irqchip style. Should I fold them together into a
helper function and also update to kmalloc_array?
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux