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

Arnd Bergmann
2015-11-04T10:09:58Z

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