From: Leonard Crestez <leonard.crestez@xxxxxxx>
Add initial support for dynamic frequency scaling of the main NOC
on imx8mq.
Make DDRC the parent of the NOC (using passive governor) so that the
main NOC is automatically scaled together with DDRC by default.
Support for proactive scaling via interconnect will come on top.
Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx>
Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxx>
---
arch/arm64/boot/dts/freescale/imx8mq.dtsi | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index a841a023e8e0..9c9d68a14e69 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1158,6 +1158,28 @@
};
};
+ noc: interconnect@32700000 {
+ compatible = "fsl,imx8mq-noc", "fsl,imx8m-noc";
+ reg = <0x32700000 0x100000>;
+ clocks = <&clk IMX8MQ_CLK_NOC>;
+ fsl,ddrc = <&ddrc>;
+ operating-points-v2 = <&noc_opp_table>;
+
+ noc_opp_table: opp-table {
+ compatible = "operating-points-v2";
+
+ opp-133M {
+ opp-hz = /bits/ 64 <133333333>;
+ };
+ opp-400M {
+ opp-hz = /bits/ 64 <400000000>;
+ };
+ opp-800M {
+ opp-hz = /bits/ 64 <800000000>;
+ };
+ };
+ };
+
bus@32c00000 { /* AIPS4 */
compatible = "fsl,aips-bus", "simple-bus";
reg = <0x32c00000 0x400000>;
--
2.20.1
