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67 lines
1.6 KiB
Diff
67 lines
1.6 KiB
Diff
One functionality provided by the SCPI handler is frequency scaling,
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which allows to switch the one CPU cluster between several operating
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points, each specifying a matching frequency and CPU voltage.
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The actual table is specified in firmware and can be queried by Linux
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using standardised SCPI calls.
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Signed-off-by: Andre Przywara <andre.p...@arm.com>
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---
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arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
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index ef6f10e..58c3675 100644
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--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
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+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
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@@ -61,6 +61,7 @@
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device_type = "cpu";
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reg = <0>;
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enable-method = "psci";
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+ clocks = <&scpi_dvfs 0>;
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};
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cpu1: cpu@1 {
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@@ -68,6 +69,7 @@
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device_type = "cpu";
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reg = <1>;
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enable-method = "psci";
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+ clocks = <&scpi_dvfs 0>;
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};
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cpu2: cpu@2 {
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@@ -75,6 +77,7 @@
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device_type = "cpu";
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reg = <2>;
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enable-method = "psci";
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+ clocks = <&scpi_dvfs 0>;
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};
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cpu3: cpu@3 {
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@@ -82,6 +85,7 @@
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device_type = "cpu";
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reg = <3>;
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enable-method = "psci";
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+ clocks = <&scpi_dvfs 0>;
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};
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};
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@@ -148,6 +152,17 @@
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compatible = "arm,scpi";
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mboxes = <&mailbox 0>;
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shmem = <&cpu_scp_mem>;
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+
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+ scpi-clocks {
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+ compatible = "arm,scpi-clocks";
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+
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+ scpi_dvfs: scpi_dvfs_clocks {
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+ compatible = "arm,scpi-dvfs-clocks";
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+ #clock-cells = <1>;
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+ clock-indices = <0>;
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+ clock-output-names = "cpu_clk";
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+ };
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+ };
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};
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soc {
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--
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2.9.0
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