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ARM: dts: rockchip: remove GPU 500 MHz OPP on rk3288

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The NPLL is the only safe way to generate 500 MHz for the GPU. The
downstream Chrome OS 3.14 kernel ('official' kernel for veyron
devices) re-purposes NPLL to HDMI and hence disables the OPP for
the GPU (see https://crrev.com/c/1574579). Disable it here as well
to keep in sync and avoid problems in case someone decides to
re-purpose NPLL.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
[moved from veyron to general rk3288, as tying up the NPLL for a
 not-that-helpful opp (not really fast but will still generate
 quite a bit of heat) doesn't make so much sense when it will
 keep us from supporting other display modes  in the future]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Matthias Kaehlcke 2019-05-20 15:00:49 -07:00 committed by Heiko Stuebner
parent ae2b6ba865
commit 75481833c6
1 changed files with 0 additions and 4 deletions
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4
arch/arm/boot/dts/rk3288.dtsi
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@ -1307,10 +1307,6 @@ opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
opp-microvolt = <1100000>;
};
opp-500000000 {
opp-hz = /bits/ 64 <500000000>;
opp-microvolt = <1200000>;
};
opp-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-microvolt = <1250000>;