2021-01-07 12:21:02

by Martin Kepplinger

Subject: [PATCH v4 1/5] arm64: dts: imx8mq: Add NOC node

From: Leonard Crestez <[email protected]>

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 <[email protected]>
Signed-off-by: Martin Kepplinger <[email protected]>
Acked-by: Georgi Djakov <[email protected]>
---
arch/arm64/boot/dts/freescale/imx8mq.dtsi | 24 +++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index a841a023e8e0..dbe480a76aa1 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1158,6 +1158,30 @@
};
};

+ 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>;
--
2.20.1

2021-01-15 11:10:15

by Shawn Guo

Subject: Re: [PATCH v4 1/5] arm64: dts: imx8mq: Add NOC node

On Thu, Jan 07, 2021 at 01:17:50PM +0100, Martin Kepplinger wrote:
> From: Leonard Crestez <[email protected]>
>
> 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 <[email protected]>
> Signed-off-by: Martin Kepplinger <[email protected]>
> Acked-by: Georgi Djakov <[email protected]>

Applied, thanks.