From 7327c3fd72dcba251d01e7ab75dc9e6baeb952c6 Mon Sep 17 00:00:00 2001
From: Nickey Yang <nickey.yang@rock-chips.com>
Date: Tue, 15 May 2018 16:37:56 +0800
Subject: [PATCH] arm: dts: rk3288: add dfi and dmc device nodes in linux

Add dfi and dmc nodes in the device tree for the ARM rk3288 SoC.
To support ddr frequency scaling function, we need enable dmc and
dfi nodes.

Change-Id: I2ec7c216647443ec4354d282fd8f321f9d399929
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
 arch/arm/boot/dts/rk3288-linux.dtsi | 64 +++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288-linux.dtsi b/arch/arm/boot/dts/rk3288-linux.dtsi
index c6db1d34a5af..3b63eedf93c5 100644
--- a/arch/arm/boot/dts/rk3288-linux.dtsi
+++ b/arch/arm/boot/dts/rk3288-linux.dtsi
@@ -3,12 +3,76 @@
  *
  * SPDX-License-Identifier: (GPL-2.0+ OR MIT).
  */
+#include <dt-bindings/soc/rockchip-system-status.h>
+#include "rk3288-dram-default-timing.dtsi"
 
 / {
 	chosen {
 		bootargs = "earlyprintk console=tty1 console=ttyS2,115200n8 rw root=PARTUUID=614e0000-0000 rootfstype=ext4 rootwait";
 	};
 
+	/delete-node/ dmc@ff610000;
+
+	dfi: dfi {
+		compatible = "rockchip,rk3288-dfi";
+		rockchip,pmu = <&pmu>;
+		rockchip,grf = <&grf>;
+		status = "disabled";
+	};
+
+	dmc: dmc {
+		compatible = "rockchip,rk3288-dmc";
+		devfreq-events = <&dfi>;
+		clocks = <&cru SCLK_DDRCLK>, <&cru PCLK_PUBL0>,
+			 <&cru PCLK_DDRUPCTL0>, <&cru PCLK_PUBL1>,
+			 <&cru PCLK_DDRUPCTL1>;
+		clock-names = "dmc_clk", "pclk_phy0", "pclk_upctl0",
+			      "pclk_phy1", "pclk_upctl1";
+		upthreshold = <55>;
+		downdifferential = <10>;
+		operating-points-v2 = <&dmc_opp_table>;
+		vop-dclk-mode = <0>;
+		min-cpu-freq = <600000>;
+		rockchip,ddr_timing = <&ddr_timing>;
+		system-status-freq = <
+			/*system status		freq(KHz)*/
+			SYS_STATUS_NORMAL	396000
+			SYS_STATUS_REBOOT	396000
+			SYS_STATUS_SUSPEND	192000
+			SYS_STATUS_VIDEO_1080P	300000
+			SYS_STATUS_VIDEO_4K	396000
+			SYS_STATUS_VIDEO_4K_10B	528000
+			SYS_STATUS_PERFORMANCE	528000
+			SYS_STATUS_BOOST	396000
+			SYS_STATUS_DUALVIEW	396000
+			SYS_STATUS_ISP		396000
+		>;
+		auto-min-freq = <396000>;
+		auto-freq-en = <0>;
+		status = "diasbled";
+	};
+
+	dmc_opp_table: opp_table2 {
+		compatible = "operating-points-v2";
+
+		opp-192000000 {
+			opp-hz = /bits/ 64 <192000000>;
+			opp-microvolt = <1100000>;
+		};
+		opp-300000000 {
+			opp-hz = /bits/ 64 <300000000>;
+			opp-microvolt = <1100000>;
+		};
+		opp-396000000 {
+			opp-hz = /bits/ 64 <396000000>;
+			opp-microvolt = <1100000>;
+		};
+		opp-528000000 {
+			opp-hz = /bits/ 64 <528000000>;
+			opp-microvolt = <1150000>;
+		};
+	};
+
 	psci {
 		compatible = "arm,psci-1.0";
 		method = "smc";