| commit | 190bdd28f9c9d7446f8e63e9050ba6f873a7f214 | [log] [tgz] |
|---|---|---|
| author | Timothy Chen <timothytim@google.com> | Sat Apr 10 00:23:54 2021 -0700 |
| committer | tjaychen <timothytim@google.com> | Mon Apr 12 17:47:07 2021 -0700 |
| tree | 4a072e34a57cca240e303b4345dc428f0698c5f6 | |
| parent | 7b60d05434b91c92573be680269c9f7bb72f1773 [diff] |
[spi_dev] Attempt to fix combo loop A combo loop was observed through the following path data_i -> dp_sel -> data_o, which then loops back to data_i. The issue is because in cmdparse the upload case immediately selects a new datapath because there are no more guaranteed clocks for certain commands. However, this same combo selection does not have to be used for the read return path, so the fix just flops the read return on spi_clk_out (spi_clk_in might also be okay) Signed-off-by: Timothy Chen <timothytim@google.com>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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