Quoting Pali Rohár (2021-01-14 04:40:28) > When CPU frequency is at 250 MHz and set_rate() is called with 500 MHz (L1) > quickly followed by a call with 1 GHz (L0), the CPU does not necessarily > stay in L1 for at least 20ms as is required by Marvell errata. > > This situation happens frequently with the ondemand cpufreq governor and > can be also reproduced with userspace governor. In most cases it causes CPU > to crash. > > This change fixes the above issue and ensures that the CPU always stays in > L1 for at least 20ms when switching from any state to L0. > > Signed-off-by: Marek Behún <ka...@kernel.org> > Signed-off-by: Pali Rohár <p...@kernel.org> > Fixes: 61c40f35f5cd ("clk: mvebu: armada-37xx-periph: Fix switching CPU rate > from 300Mhz to 1.2GHz") > Cc: sta...@vger.kernel.org > ---
Acked-by: Stephen Boyd <sb...@kernel.org>