From: Neil Armstrong <narmstrong@baylibre.com>
To: khilman@baylibre.com
Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Neil Armstrong <narmstrong@baylibre.com>
Subject: [PATCH 3/6] arm64: dts: meson-g12a: add cpus OPP table
Date: Mon, 29 Jul 2019 15:26:19 +0200 [thread overview]
Message-ID: <20190729132622.7566-4-narmstrong@baylibre.com> (raw)
In-Reply-To: <20190729132622.7566-1-narmstrong@baylibre.com>
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>
---
arch/arm64/boot/dts/amlogic/meson-g12a.dtsi | 60 +++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
index ac15967bb7fa..733a9d46fc4b 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
@@ -48,6 +48,66 @@
compatible = "cache";
};
};
+
+ cpu_opp_table: opp-table {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-100000000 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <731000>;
+ };
+
+ opp-250000000 {
+ opp-hz = /bits/ 64 <250000000>;
+ opp-microvolt = <731000>;
+ };
+
+ opp-500000000 {
+ opp-hz = /bits/ 64 <500000000>;
+ opp-microvolt = <731000>;
+ };
+
+ opp-667000000 {
+ opp-hz = /bits/ 64 <666666666>;
+ opp-microvolt = <731000>;
+ };
+
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <731000>;
+ };
+
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <731000>;
+ };
+
+ opp-1398000000 {
+ opp-hz = /bits/ 64 <1398000000>;
+ opp-microvolt = <761000>;
+ };
+
+ opp-1512000000 {
+ opp-hz = /bits/ 64 <1512000000>;
+ opp-microvolt = <791000>;
+ };
+
+ opp-1608000000 {
+ opp-hz = /bits/ 64 <1608000000>;
+ opp-microvolt = <831000>;
+ };
+
+ opp-1704000000 {
+ opp-hz = /bits/ 64 <1704000000>;
+ opp-microvolt = <861000>;
+ };
+
+ opp-1800000000 {
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <981000>;
+ };
+ };
};
&sd_emmc_a {
--
2.22.0
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next prev parent reply other threads:[~2019-07-29 13:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 13:26 [PATCH 0/6] arm64: g12a: add support for DVFS Neil Armstrong
2019-07-29 13:26 ` [PATCH 1/6] arm64: dts: move common G12A & G12B modes to meson-g12-common.dtsi Neil Armstrong
2019-07-29 13:26 ` [PATCH 2/6] arm64: dts: meson-g12-common: add pwm_a on GPIOE_2 pinmux Neil Armstrong
2019-07-29 13:26 ` Neil Armstrong [this message]
2019-07-29 13:26 ` [PATCH 4/6] arm64: dts: meson-g12a: enable DVFS on G12A boards Neil Armstrong
2019-07-29 13:26 ` [PATCH 5/6] arm64: dts: meson-g12b: add cpus OPP tables Neil Armstrong
2019-07-29 13:26 ` [PATCH 6/6] arm64: dts: meson-g12b-odroid-n2: enable DVFS Neil Armstrong
2019-08-05 19:07 ` [PATCH 0/6] arm64: g12a: add support for DVFS Kevin Hilman
2019-08-08 23:56 ` Kevin Hilman
2019-08-09 18:21 ` Kevin Hilman
2019-08-12 20:54 ` Kevin Hilman
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