From: Leonard Crestez <leonard.crestez@nxp.com>
To: Stephen Boyd <sboyd@kernel.org>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Rob Herring <robh+dt@kernel.org>
Cc: "Shawn Guo" <shawnguo@kernel.org>,
"Michael Turquette" <mturquette@baylibre.com>,
"Chanwoo Choi" <cw00.choi@samsung.com>,
"Artur Świgoń" <a.swigon@partner.samsung.com>,
"Saravana Kannan" <saravanak@google.com>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Alexandre Bailon" <abailon@baylibre.com>,
"Georgi Djakov" <georgi.djakov@linaro.org>,
"Dong Aisheng" <aisheng.dong@nxp.com>,
"Abel Vesa" <abel.vesa@nxp.com>, "Jacky Bai" <ping.bai@nxp.com>,
"Anson Huang" <Anson.Huang@nxp.com>,
"Fabio Estevam" <fabio.estevam@nxp.com>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
"Will Deacon" <will@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
linux-imx@nxp.com, kernel@pengutronix.de,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 7/7] arm64: dts: imx8mm: Add devfreq nodes
Date: Mon, 12 Aug 2019 21:49:51 +0300 [thread overview]
Message-ID: <7fedd392f49dfd22b6365fdd1399ad362e5920b9.1565633880.git.leonard.crestez@nxp.com> (raw)
In-Reply-To: <cover.1565633880.git.leonard.crestez@nxp.com>
In-Reply-To: <cover.1565633880.git.leonard.crestez@nxp.com>
Add initial support for bus scaling on imx8m, starting with noc and ddrc
because they're the biggest power hogs.
Add a devfreq-event link to the PMU in order to support on-demand
scaling of ddrc based on measured dram bandwith usage. Make ddrc a
parent of the NOC because all traffic to ddrc goes through
Support for proactive scaling via interconnect and support for scaling
additional NICs will come later. The high-performance bus masters which
need that (display, vpu, gpu) are not yet enabled in upstream anyway.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8mm.dtsi | 51 ++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index e8560d15c130..a37d82133c06 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -122,10 +122,38 @@
clock-latency-ns = <150000>;
opp-suspend;
};
};
+ ddrc_opp_table: ddrc-opp-table {
+ compatible = "operating-points-v2";
+
+ opp-25M {
+ opp-hz = /bits/ 64 <25000000>;
+ };
+ opp-100M {
+ opp-hz = /bits/ 64 <100000000>;
+ };
+ opp-750M {
+ opp-hz = /bits/ 64 <750000000>;
+ };
+ };
+
+ noc_opp_table: noc-opp-table {
+ compatible = "operating-points-v2";
+
+ opp-150M {
+ opp-hz = /bits/ 64 <150000000>;
+ };
+ opp-375M {
+ opp-hz = /bits/ 64 <375000000>;
+ };
+ opp-750M {
+ opp-hz = /bits/ 64 <750000000>;
+ };
+ };
+
memory@40000000 {
device_type = "memory";
reg = <0x0 0x40000000 0 0x80000000>;
};
@@ -748,10 +776,18 @@
status = "disabled";
};
};
+ noc: noc@32700000 {
+ compatible = "fsl,imx8mm-noc", "fsl,imx8m-noc";
+ reg = <0x32700000 0x100000>;
+ clocks = <&clk IMX8MM_CLK_NOC>;
+ devfreq = <&ddrc>;
+ operating-points-v2 = <&noc_opp_table>;
+ };
+
aips4: bus@32c00000 {
compatible = "fsl,aips-bus", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x32c00000 0x32c00000 0x400000>;
@@ -832,11 +868,24 @@
#interrupt-cells = <3>;
interrupt-controller;
interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
};
- ddr-pmu@3d800000 {
+ ddrc: dram-controller@3d400000 {
+ compatible = "fsl,imx8mm-ddrc", "fsl,imx8m-ddrc";
+ reg = <0x3d400000 0x400000>;
+ clock-names = "dram_core", "dram_pll", "dram_alt_root", "dram_alt", "dram_apb";
+ clocks = <&clk IMX8MM_CLK_DRAM_CORE>,
+ <&clk IMX8MM_DRAM_PLL>,
+ <&clk IMX8MM_CLK_DRAM_ALT_ROOT>,
+ <&clk IMX8MM_CLK_DRAM_ALT>,
+ <&clk IMX8MM_CLK_DRAM_APB>;
+ devfreq-events = <&ddr_pmu>;
+ operating-points-v2 = <&ddrc_opp_table>;
+ };
+
+ ddr_pmu: ddr-pmu@3d800000 {
compatible = "fsl,imx8mm-ddr-pmu", "fsl,imx8m-ddr-pmu";
reg = <0x3d800000 0x400000>;
interrupt-parent = <&gic>;
interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
};
--
2.17.1
next prev parent reply other threads:[~2019-08-12 18:50 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-12 18:49 [PATCH 0/7] PM / devfreq: Add initial imx support Leonard Crestez
2019-08-12 18:49 ` [PATCH 1/7] clk: imx8m: Set CLK_GET_RATE_NOCACHE on dram_alt/apb Leonard Crestez
2019-08-12 18:49 ` [PATCH 2/7] dt-bindings: devfreq: Add bindings for generic imx buses Leonard Crestez
2019-08-12 19:46 ` Rob Herring
2019-08-13 1:32 ` Leonard Crestez
2019-08-13 14:06 ` Rob Herring
2019-08-13 14:59 ` Leonard Crestez
2019-08-12 18:49 ` [PATCH 3/7] PM / devfreq: Add generic imx bus driver Leonard Crestez
2019-08-12 18:49 ` [PATCH 4/7] dt-bindings: devfreq: Add bindings for imx ddr controller Leonard Crestez
2019-08-12 19:51 ` Rob Herring
2019-08-12 18:49 ` [PATCH 5/7] PM / devfreq: Add dynamic scaling " Leonard Crestez
2019-08-12 18:49 ` [PATCH 6/7] PM / devfreq: imx-ddrc: Measure bandwidth with perf Leonard Crestez
2019-08-12 18:49 ` Leonard Crestez [this message]
[not found] ` <CGME20190812185002epcas1p1c528b12d20771cf4887907fdfd716e22@epcms1p2>
2019-08-13 2:25 ` [PATCH 2/7] dt-bindings: devfreq: Add bindings for generic imx buses MyungJoo Ham
[not found] ` <CGME20190812185005epcas3p10a9a3dbb90489534222e093c63f27900@epcms1p3>
2019-08-13 2:33 ` [PATCH 3/7] PM / devfreq: Add generic imx bus driver MyungJoo Ham
2019-08-13 3:02 ` Leonard Crestez
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