[PATCH] ARM: /proc/atags: Export also for DT

Pavel Machek
2015-01-27T13:21:27Z

On Mon 2015-01-26 14:33:21, Rob Herring wrote:
> On Mon, Jan 26, 2015 at 1:16 PM, Pali Roh?r <pali.rohar@gmail.com> wrote:
> > This patch will cause that decompressor store full ATAG structure into DT tree ("/atags"):
> >

> > + /* include the terminating ATAG_NONE */
> > + atag_size = (char *)atag - (char *)atag_list + sizeof(struct tag_header);
> > + setprop(fdt, "/", "atags", atag_list, atag_size);
> > +
> > if (memcount) {
> > setprop(fdt, "/memory", "reg", mem_reg_property,
> > 4 * memcount * memsize);
> >
> >
> >
> > And this patch will export ATAG structure from DT tree ("/atags") into /proc/atags file:
>
> Please properly send your patches.

Actually, when sending patches for discussion, this is format easier
to read.

> > Some userspace applications needs access to ATAG structure where can be stored some information passed
> > from bootloader to kernel. Example is Nokia N900 device and NOLO bootloader which provides information
> > about bootreason (device was started by power button or by alarm or restarted...) and bootmode (normal
> > mode or device update mode).
>
> This goes in the commit message.
>
> These would be non-standard fields which are not upstream. I don't
> know that we care in that case...

Other devices are going to care about boot reason, too, and we might
as well be compatible...
Pavel

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