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Consumption of phandles will be in the form of locating a functional
device (e.g. a GPIO device, or an I2C device, or a reset controller)
by phandle, rather than locating the device tree node to which the
phandle refers.
Repurpose fdt_phandle() to obtain the phandle value (instead of
searching by phandle), and record this value as the bus location
within the generic device structure.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Non-permitted name characters such as a colon are sometimes used to
separate alias names or paths from additional metadata, such as the
baud rate for a UART in the "/chosen/stdout-path" property.
Support the use of such alias names and paths by allowing any
character not permitted in a property name to terminate a property or
node name match. (This is a very relaxed matching rule that will
produce false positive matches on invalid input, but this is unlikely
to cause problems in practice.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Add fdt_cells() to read scalar values encoded within a cell array,
reimplement fdt_u64() as a wrapper around this, and add fdt_u32() for
completeness.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Refactor device tree traversal to operate on the basis of describing
the token at a given offset, with no separate notion of a device tree
cursor.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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