Re: [PATCH 2/2] drivers/gpio: Port gpio driver to layerscape platform

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

 




On Wednesday 04 November 2015 03:17:38 Scott Wood wrote:
> > I guess this is fixed per architecture, so you could also do this as
> > 
> > static inline void gpio_out32(u32 val, void __iomem *addr)
> > {
> >       if (IS_ENABLED(CONFIG_ARM))
> >               iowrite32(val, addr);
> >       else if (IS_ENABLED(CONFIG_PPC))
> >               iowrite32be(val, addr);
> >       else
> >               BUG();
> > }
> 
> Unfortunately that guess is wrong.  Some of our ARM chips have big-endian I/O 
> and some have little-endian I/O.

Ok, I see. In that case, using run-time detection everywhere is
probably best.

	Arnd
--
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