Quoting Shawn Guo (2021-09-13 19:55:52) > On QCM2290 platform, the clock xo_board runs at 38400000, while the > child clock bi_tcxo needs to run at 19200000. That said, > clk_smd_rpm_branch_ops needs the capability of setting rate. Add rate > hooks into clk_smd_rpm_branch_ops to make it possible. This doesn't sound right. The branch is a simple on/off. If xo_board is 38.4MHz, then there is an internal divider in the SoC that makes bi_tcxo (i.e. the root of the entire clk tree) be 19.2MHz. We don't model the divider, I guess because it isn't very important to. Instead, we tack on a divider field and implement recalc_rate op. See clk-rpmh.c in the qcom directory for this.
