Xing, On Tue, Aug 2, 2016 at 6:13 AM, Xing Zheng <zhengx...@rock-chips.com> wrote: > From: Elaine Zhang <zhangq...@rock-chips.com> > > The suggestion that is from IC designer, the correct pll sequence setting > should be like these: > ---- > set pll to slow mode or other plls > set pll down > set pll params > set pll up > wait pll lock status > set pll to normal mode > ---- > > Hence, there are potential risks that we need to fix: > rockchip_rk3399_wait_pll_lock - timeout waiting for pll to lock > rockchip_rk3399_pll_set_params - pll update unsucessful, trying to restore > old params
I still don't understand how that groks with the statement in the TRM: > In most cases the PLL programming can be changed on-the-fly and the PLL will > simply slew to the new frequency That makes it sound like these PLLs are super great at dynamic updates.
