clk: starfive: pll: Fix lower rate of CPUfreq by setting PLL0 rate to 1.5GHz #815
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… 1.5GHz CPUfreq supports 4 cpu frequency loads on 375/500/750/1500MHz. But now PLL0 rate is 1GHz and the cpu frequency loads become 333/500/500/1000MHz in fact. So PLL0 rate should be default set to 1.5GHz. But setting the PLL0 rate need certain steps: 1. Change the parent of cpu_root clock to OSC clock. 2. Change the divider of cpu_core if PLL0 rate is higher than 1.25GHz before CPUfreq boot. 3. Change the parent of cpu_root clock back to PLL0 clock. Reviewed-by: Hal Feng <hal.feng@starfivetech.com> Fixes: e2c510d ("riscv: dts: starfive: Add cpu scaling for JH7110 SoC") Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com> Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
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Upstream branch: 4cece76 |
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At least one diff in series https://patchwork.kernel.org/project/linux-riscv/list/?series=840524 irrelevant now. Closing PR. |
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Pull request for series with
subject: clk: starfive: pll: Fix lower rate of CPUfreq by setting PLL0 rate to 1.5GHz
version: 3
url: https://patchwork.kernel.org/project/linux-riscv/list/?series=840524