Re: [dtc] Allow multipart property values
From: Jon Loeliger <hidden>
Date: 2007-02-07 14:35:25
So, like, the other day David Gibson mumbled:
At present each property definition in a dts file must give as the
value either a string ("abc..."), a bytestring ([12abcd...]) or a cell
list (<1 2 3 ...>). This patch allows a property value to be given as
several of these, comma-separated. The final property value is just
the components appended together. So a property could have a list of
cells followed by a string, or a bytestring followed by some cells.
Cells are always aligned, so if cells are given following a string or
bytestring which is not a multiple of 4 bytes long, zero bytes are
inserted to align the following cells.
The primary motivation for this feature, however, is to allow defining
a property as a list of several strings. This is what's needed for
defining OF 'compatible' properties, and is less ugly and fiddly than
using embedded \0s in the strings.David, I'd like a bit of clarification on the issue of null-padding. I'm not sure how it is supposed to work for OF originally, but I'm not sure the null-padding to mod 4 will be the same (or usable) semantics. In OF's original definition would "ab\0de" yield something different than a similar "ab", [0], "de" with your proposal? I could see that we might have: OF : a b \0 d e Yours: a b \0 \0 \0 d e Or does the OF spec say that it will also pad to mod 4? Or do all strings always start on mod 4 address? Thanks, jdl