arm64: dts: imx8mq: Add NOC node

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@nxp.com>
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Acked-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 9fcb001b8dde7b02a6c703f0bb6d0ca8e6c27c89..efabd7bb88cf378a7cd9353024ccdec60eec9571 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1169,6 +1169,30 @@
                        };
                };
 
+               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>;