| Subject | Re: [PATCH mvebu v2 06/10] clk: mvebu: armada-37xx-periph: Fix workaround for switching from L1 to L0 | From | Stephen Boyd <> | Date | Tue, 09 Feb 2021 17:58:31 -0800 |
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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 <kabel@kernel.org> > Signed-off-by: Pali Rohár <pali@kernel.org> > Fixes: 61c40f35f5cd ("clk: mvebu: armada-37xx-periph: Fix switching CPU rate from 300Mhz to 1.2GHz") > Cc: stable@vger.kernel.org > ---
Acked-by: Stephen Boyd <sboyd@kernel.org>
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