On 08/14/2017 09:12 AM, Eugeniy Paltsev wrote:
Set cpu frequency explicitly via "cpu-freq" param in cpu 0 node
in device tree.
We add "cpu-freq" only to cpu 0 as all cpus are clocking from same
clock source (same pll in our case).
We override cpus node in skeleton as we don't need this change for
nsim.
Given that you added a generic feature as part of 1/5 - do other platforms
abilis/nps need corresponding fixups as this one !
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
---
arch/arc/boot/dts/axc003.dtsi | 13 +++++++++++++
arch/arc/boot/dts/axc003_idu.dtsi | 35 +++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+)
diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
index dca7e39..7c7411c 100644
--- a/arch/arc/boot/dts/axc003.dtsi
+++ b/arch/arc/boot/dts/axc003.dtsi
@@ -17,6 +17,19 @@
#address-cells = <2>;
#size-cells = <2>;
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "snps,archs38";
+ reg = <0>;
+ cpu-freq = <100000000>;
+ clocks = <&core_clk>;
+ };
+ };
+
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
index 5b56bef..44bc01e 100644
--- a/arch/arc/boot/dts/axc003_idu.dtsi
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -17,6 +17,41 @@
#address-cells = <2>;
#size-cells = <2>;
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /*
+ * "cpu-freq" was added only to cpu 0 as all cpus are clocking
+ * from same clock source (same pll (core_clk) in our case).
+ */
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "snps,archs38";
+ reg = <0>;
+ cpu-freq = <100000000>;
+ clocks = <&core_clk>;
+ };
+ cpu@1 {
+ device_type = "cpu";
+ compatible = "snps,archs38";
+ reg = <1>;
+ clocks = <&core_clk>;
+ };
+ cpu@2 {
+ device_type = "cpu";
+ compatible = "snps,archs38";
+ reg = <2>;
+ clocks = <&core_clk>;
+ };
+ cpu@3 {
+ device_type = "cpu";
+ compatible = "snps,archs38";
+ reg = <3>;
+ clocks = <&core_clk>;
+ };
+ };
+
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
--
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