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2011-10-11dtc: Add support for variable sized elementsAnton Staaf1-11/+23
Elements of size 8, 16, 32, and 64 bits are supported. The new /bits/ syntax was selected so as to not pollute the reserved keyword space with uint8/uint16/... type names. With this patch the following property assignment: property = /bits/ 16 <0x1234 0x5678 0x0 0xffff>; is equivalent to: property = <0x12345678 0x0000ffff>; It is now also possible to directly specify a 64 bit literal in a cell list, also known as an array using: property = /bits/ 64 <0xdeadbeef00000000>; It is an error to attempt to store a literal into an element that is too small to hold the literal, and the compiler will generate an error when it detects this. For instance: property = /bits/ 8 <256>; Will fail to compile. It is also an error to attempt to place a reference in a non 32-bit element. The documentation has been changed to reflect that the cell list is now an array of elements that can be of sizes other than the default 32-bit cell size. The sized_cells test tests the creation and access of 8, 16, 32, and 64-bit sized elements. It also tests that the creation of two properties, one with 16 bit elements and one with 32 bit elements result in the same property contents. Signed-off-by: Anton Staaf <robotboy@chromium.org> Acked-by: David Gibson <david@gibson.dropbear.id.au>
2011-09-22dtc: Support character literals in cell listsAnton Staaf1-1/+1
With this patch the following property assignment: property = <0x12345678 'a' '\r' 100>; is equivalent to: property = <0x12345678 0x00000061 0x0000000D 0x00000064> Signed-off-by: Anton Staaf <robotboy@chromium.org> Acked-by: David Gibson <david@gibson.dropbear.id.au>
2008-03-23dtc: Add some documentation for the dts formtaDavid Gibson1-0/+110
This patch adds a dts-format.txt in the Documentation directory, with an introduction to the dtc source format. Note that this documentation is also going into the upcoming ePAPR specification. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>