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arm64: dts: imx8mq: Add NOC node

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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>
This commit is contained in:
Leonard Crestez 2021-01-07 13:17:50 +01:00 committed by Shawn Guo
parent 642856097c
commit f18e6d573b
1 changed files with 24 additions and 0 deletions
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24
arch/arm64/boot/dts/freescale/imx8mq.dtsi
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@ -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>;