linux-kernel - [PATCH 09/10] arm64: dts: rk3399: Add dfi and dmc nodes

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Date:   Fri,  7 Jan 2022 15:53:19 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        linux-arm-kernel@...ts.infradead.org,
        Lin Huang <hl@...k-chips.com>, devicetree@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-pm@...r.kernel.org,
        Derek Basehore <dbasehore@...omium.org>,
        linux-kernel@...r.kernel.org,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Gaël PORTAY <gael.portay@...labora.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Brian Norris <briannorris@...omium.org>
Subject: [PATCH 09/10] arm64: dts: rk3399: Add dfi and dmc nodes

From: Lin Huang <hl@...k-chips.com>

These are required to support DDR DVFS on RK3399 platforms.

Signed-off-by: Lin Huang <hl@...k-chips.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Signed-off-by: Gaël PORTAY <gael.portay@...labora.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Brian Norris <briannorris@...omium.org>
---
This is based on a v5 posting from various authors:
https://lore.kernel.org/lkml/20210308233858.24741-3-daniel.lezcano@linaro.org/
Much of that series was already merged, so I start over with the
numbering.

Change since Daniel's posting: reordered by unit address, per existing
style

 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index d3cdf6f42a30..86e2d87e008a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -1295,6 +1295,25 @@ pwm3: pwm@...20030 {
 		status = "disabled";
 	};
 
+	dfi: dfi@...30000 {
+		reg = <0x00 0xff630000 0x00 0x4000>;
+		compatible = "rockchip,rk3399-dfi";
+		rockchip,pmu = <&pmugrf>;
+		interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH 0>;
+		clocks = <&cru PCLK_DDR_MON>;
+		clock-names = "pclk_ddr_mon";
+		status = "disabled";
+	};
+
+	dmc: dmc {
+		compatible = "rockchip,rk3399-dmc";
+		rockchip,pmu = <&pmugrf>;
+		devfreq-events = <&dfi>;
+		clocks = <&cru SCLK_DDRC>;
+		clock-names = "dmc_clk";
+		status = "disabled";
+	};
+
 	vpu: video-codec@...50000 {
 		compatible = "rockchip,rk3399-vpu";
 		reg = <0x0 0xff650000 0x0 0x800>;
-- 
2.34.1.575.g55b058a8bb-goog