* [PATCH v2] arm64: dts: rockchip: add more cpu operating points for RK3328
@ 2019-03-01 19:55 Leonidas P. Papadakos
[not found] ` <20190301195552.12562-1-papadakospan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Leonidas P. Papadakos @ 2019-03-01 19:55 UTC (permalink / raw)
To: Rob Herring
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner,
Leonidas P. Papadakos
This allows for greater max frequency on rk3328 boards,
increasing performance.
It has been included in Armbian (a linux distibution for ARM boards)
for a while now without any reported issues
https://github.com/armbian/build/blob/master/patch/kernel/rockchip64-default/enable-1392mhz-opp.patch
https://github.com/armbian/build/blob/master/patch/kernel/rockchip64-default/enable-1512mhz-opp.patch
Signed-off-by: Leonidas P. Papadakos <papadakospan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
arch/arm64/boot/dts/rockchip/rk3328.dtsi | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3328.dtsi b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
index 84f14b132..42a59f254 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
@@ -123,6 +123,16 @@
opp-microvolt = <1300000>;
clock-latency-ns = <40000>;
};
+ opp-1392000000 {
+ opp-hz = /bits/ 64 <1392000000>;
+ opp-microvolt = <1350000>;
+ clock-latency-ns = <40000>;
+ };
+ opp-1512000000 {
+ opp-hz = /bits/ 64 <1512000000>;
+ opp-microvolt = <1450000>;
+ clock-latency-ns = <40000>;
+ };
};
amba {
--
2.21.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] arm64: dts: rockchip: add more cpu operating points for RK3328
[not found] ` <20190301195552.12562-1-papadakospan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
@ 2019-03-12 14:28 ` Heiko Stuebner
0 siblings, 0 replies; 2+ messages in thread
From: Heiko Stuebner @ 2019-03-12 14:28 UTC (permalink / raw)
To: Leonidas P. Papadakos
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Rob Herring
Am Freitag, 1. März 2019, 20:55:53 CET schrieb Leonidas P. Papadakos:
> This allows for greater max frequency on rk3328 boards,
> increasing performance.
>
> It has been included in Armbian (a linux distibution for ARM boards)
> for a while now without any reported issues
>
> https://github.com/armbian/build/blob/master/patch/kernel/rockchip64-default/enable-1392mhz-opp.patch
> https://github.com/armbian/build/blob/master/patch/kernel/rockchip64-default/enable-1512mhz-opp.patch
>
> Signed-off-by: Leonidas P. Papadakos <papadakospan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
as per the response from Rockchip regarding the maximum specification,
we'll stay within the save area of frequencies - so not adding these
higher ones.
Overclocking a chip is a personal prerogative but should not be part
of the general mainline devicetree.
Heiko
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2019-03-01 19:55 [PATCH v2] arm64: dts: rockchip: add more cpu operating points for RK3328 Leonidas P. Papadakos
[not found] ` <20190301195552.12562-1-papadakospan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2019-03-12 14:28 ` Heiko Stuebner
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