[alsa-devel] [PATCH 1/2] ASoC: p1022ds: fix incorrect referencing of device tree properties

Timur Tabi timur at freescale.com
Thu Jun 9 00:27:01 CEST 2011

Steve Calfee wrote:
>> Device tree integer properties are encoded in big-endian format, but some of
>> > the Freescale ASoC drivers were assuming that the host is in big-endian format
>> > as well.  Although this is true, it's better to use endian-safe accessors.
> Hi Timur,
> Can this be true?

Yes, it's true.  When the device tree compiler compiles a property that looks
like this:

	fsl,ssi-fifo-depth = <15>;

It writes the following bytes into the dtb:

	00 00 00 0f

> I would assume a software constructed data structure would be in
> host-endian mode.

I wouldn't assume that at all.  The device tree format is a defined binary
format.  It makes sense that the endianness of multi-byte integers is defined.

Timur Tabi
Linux kernel developer at Freescale

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