| commit | 5a5cfc474a22641c18eeb27c2f0b3d631f7758ff | [log] [tgz] |
|---|---|---|
| author | Rupert Swarbrick <rswarbrick@lowrisc.org> | Fri Apr 16 16:31:53 2021 +0100 |
| committer | Rupert Swarbrick <rswarbrick@gmail.com> | Sun Apr 18 16:31:48 2021 +0100 |
| tree | aa666ca464fa45bea315261b6b0e7081f286aff0 | |
| parent | 8ca4c447c6165767cdb9493c26f3cea6c0079a92 [diff] |
[clkmgr] Avoid generating unused root-gated clocks
In top_earlgrey, the "io" clock is only used for feeding clock
dividers and its gated version ("clk_io_root") is unused. Teach
topgen.py to be more careful when constructing rg_srcs, so that it
only adds a clock name if that clock is either exposed in clocks_o or
really is a source for some other clock.
While getting my head around the code, I also rejigged things a bit to
make them easier to understand (and easier to construct
"rg_srcs_set"), adding some comments about what the different
dictionaries mean.
Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>
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