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author | Neil Armstrong <narmstrong@baylibre.com> | 2019-07-29 15:26:19 +0200 |
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committer | Kevin Hilman <khilman@baylibre.com> | 2019-08-09 11:06:49 -0700 |
commit | b190056fa9eecc016b6a6e41f89a04da14b78bf7 (patch) | |
tree | 5d2add88ef0764cbc30283b4baa0f532b05b27db /arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts | |
parent | cca30c891247fc35655bc24836f46094771d3d47 (diff) |
arm64: dts: meson-g12a: add cpus OPP table
Add the OPP table taken from the vendor u200 and u211 DTS.
The Amlogic G12A SoC seems to available in 3 types :
- low-speed: up to 1,8GHz
- mid-speed: up to 1,908GHz
- high-speed: up to 2.1GHz
And the S905X2 opp voltages are slightly higher than the S905D2
OPP voltages for the low-speed table.
This adds the conservative OPP table with the S905X2 higher voltages
and the maximum low-speed OPP frequency.
The values were tested to be stable on an Amlogic U200 Reference Board,
SeiRobotics SEI510 and X96 Max Set-Top-Boxes 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 <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Diffstat (limited to 'arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts')
0 files changed, 0 insertions, 0 deletions