Re: [RFC/RFT v3 12/14] arm64: dts: meson-g12a: enable DVFS on G12A boards
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: 2019-07-03 00:49:11
Also in:
linux-amlogic, linux-clk, linux-gpio, lkml
On Mon, Jul 1, 2019 at 11:13 AM Neil Armstrong [off-list ref] wrote:
Enable DVFS for the U200, SEI520 and X96-Max Amlogic G12A based board by setting the clock, OPP and supply for each CPU cores. The CPU cluster power supply can achieve 0.73V to 1.01V using a PWM output clocked at 800KHz with an inverse duty-cycle. DVFS has been tested by running the arm64 cpuburn at [1] and cycling between all the possible cpufreq translations and checking the final frequency using the clock-measurer, script at [2]. [1] https://github.com/ssvb/cpuburn-arm/blob/master/cpuburn-a53.S [2] https://gist.github.com/superna9999/d4de964dbc0f84b7d527e1df2ddea25f Signed-off-by: Neil Armstrong <redacted>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel