4e76ec796c
Iterating through subnodes with libfdt is a little painful to write as we
need something like this:
for (depth = 0, count = 0,
offset = fdt_next_node(fdt, parent_offset, &depth);
(offset >= 0) && (depth > 0);
offset = fdt_next_node(fdt, offset, &depth)) {
if (depth == 1) {
/* code body */
}
}
Using fdt_next_subnode() we can instead write this, which is shorter and
easier to get right:
for (offset = fdt_first_subnode(fdt, parent_offset);
offset >= 0;
offset = fdt_next_subnode(fdt, offset)) {
/* code body */
}
Also, it doesn't require two levels of indentation for the loop body.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
44 lines
761 B
Text
44 lines
761 B
Text
/dts-v1/;
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/ {
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#address-cells = <1>;
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#size-cells = <0>;
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test1 {
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subnodes = <2>;
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linux,phandle = <0x1>;
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#address-cells = <1>;
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#size-cells = <0>;
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PowerPC,970@0 {
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name = "PowerPC,970";
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device_type = "cpu";
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reg = <0x00000000>;
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clock-frequency = <1600000000>;
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timebase-frequency = <33333333>;
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linux,boot-cpu;
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i-cache-size = <65536>;
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d-cache-size = <32768>;
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another-sub-node {
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should-be-ignored;
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yet-another {
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should-also-be-ignored;
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};
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};
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};
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PowerPC,970@1 {
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name = "PowerPC,970";
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device_type = "cpu";
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reg = <0x00000001>;
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clock-frequency = <1600000000>;
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timebase-frequency = <33333333>;
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i-cache-size = <65536>;
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d-cache-size = <32768>;
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};
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};
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test2 {
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subnodes = <0>;
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};
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};
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