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Message-Id: <20181129230044.21358-2-martin.blumenstingl@googlemail.com>
Date: Fri, 30 Nov 2018 00:00:43 +0100
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: linux-amlogic@...ts.infradead.org, khilman@...libre.com,
carlo@...one.org
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 1/2] ARM: dts: meson: meson8: add the CPU OPP table
The values are taken from Amlogic's 3.10 kernel sources. Their sources
have a "meson8m2_n200_2G.dtd" which defines a different voltage table:
- 0.86V for 96MHz
- (values in between omitted)
- 1.14V for 1.992GHz
The reason for this is simply the hardware design because the voltage
regulator on this board is has a minimum output of 0.86V and a maximum
output of 1.14V. The recommended settings are added with this patch
instead of using the values that are only valid for one board.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
arch/arm/boot/dts/meson8.dtsi | 72 +++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index 2575a5835567..e5cd325d7ea8 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -64,6 +64,8 @@
reg = <0x200>;
enable-method = "amlogic,meson8-smp";
resets = <&clkc CLKC_RESET_CPU0_SOFT_RESET>;
+ operating-points-v2 = <&cpu_opp_table>;
+ clocks = <&clkc CLKID_CPUCLK>;
};
cpu1: cpu@201 {
@@ -73,6 +75,8 @@
reg = <0x201>;
enable-method = "amlogic,meson8-smp";
resets = <&clkc CLKC_RESET_CPU1_SOFT_RESET>;
+ operating-points-v2 = <&cpu_opp_table>;
+ clocks = <&clkc CLKID_CPUCLK>;
};
cpu2: cpu@202 {
@@ -82,6 +86,8 @@
reg = <0x202>;
enable-method = "amlogic,meson8-smp";
resets = <&clkc CLKC_RESET_CPU2_SOFT_RESET>;
+ operating-points-v2 = <&cpu_opp_table>;
+ clocks = <&clkc CLKID_CPUCLK>;
};
cpu3: cpu@203 {
@@ -91,6 +97,72 @@
reg = <0x203>;
enable-method = "amlogic,meson8-smp";
resets = <&clkc CLKC_RESET_CPU3_SOFT_RESET>;
+ operating-points-v2 = <&cpu_opp_table>;
+ clocks = <&clkc CLKID_CPUCLK>;
+ };
+ };
+
+ cpu_opp_table: opp-table {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-96000000 {
+ opp-hz = /bits/ 64 <96000000>;
+ opp-microvolt = <825000>;
+ };
+ opp-192000000 {
+ opp-hz = /bits/ 64 <192000000>;
+ opp-microvolt = <825000>;
+ };
+ opp-312000000 {
+ opp-hz = /bits/ 64 <312000000>;
+ opp-microvolt = <825000>;
+ };
+ opp-408000000 {
+ opp-hz = /bits/ 64 <408000000>;
+ opp-microvolt = <825000>;
+ };
+ opp-504000000 {
+ opp-hz = /bits/ 64 <504000000>;
+ opp-microvolt = <825000>;
+ };
+ opp-600000000 {
+ opp-hz = /bits/ 64 <600000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-720000000 {
+ opp-hz = /bits/ 64 <720000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-816000000 {
+ opp-hz = /bits/ 64 <816000000>;
+ opp-microvolt = <875000>;
+ };
+ opp-1008000000 {
+ opp-hz = /bits/ 64 <1008000000>;
+ opp-microvolt = <925000>;
+ };
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <975000>;
+ };
+ opp-1416000000 {
+ opp-hz = /bits/ 64 <1416000000>;
+ opp-microvolt = <1025000>;
+ };
+ opp-1608000000 {
+ opp-hz = /bits/ 64 <1608000000>;
+ opp-microvolt = <1100000>;
+ };
+ opp-1800000000 {
+ status = "disabled";
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <1125000>;
+ };
+ opp-1992000000 {
+ status = "disabled";
+ opp-hz = /bits/ 64 <1992000000>;
+ opp-microvolt = <1150000>;
};
};
--
2.19.2
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