linux-kernel - [PATCH 3/3] arm64: dts: imx8mm: properly describe IRQ hierarchy

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Date:   Wed,  1 Jan 2020 17:31:36 +0100
From:   Michael Trimarchi <michael@...rulasolutions.com>
To:     Shawn Guo <shawnguo@...nel.org>
Cc:     Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Fabio Estevam <festevam@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-amarula@...rulasolutions.com
Subject: [PATCH 3/3] arm64: dts: imx8mm: properly describe IRQ hierarchy

The GPCv2 sits between most of the peripherals and the GIC and
functions as a wakeup controller for the CPU cores. Add already
two power domains. Those domains was tested on imx8mm board

Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 31 ++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 6edbdfe2d0d7..7360dc0685eb 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/clock/imx8mm-clock.h>
+#include <dt-bindings/power/imx8mm-power.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -12,7 +13,7 @@
 #include "imx8mm-pinfunc.h"
 
 / {
-	interrupt-parent = <&gic>;
+	interrupt-parent = <&gpc>;
 	#address-cells = <2>;
 	#size-cells = <2>;
 
@@ -197,6 +198,7 @@
 		interrupts = <GIC_PPI 7
 			     (GIC_CPU_MASK_SIMPLE(6) | IRQ_TYPE_LEVEL_HIGH)>;
 		interrupt-affinity = <&A53_0>, <&A53_1>, <&A53_2>, <&A53_3>;
+		interrupt-parent = <&gic>;
 	};
 
 	timer {
@@ -206,6 +208,7 @@
 			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(6) | IRQ_TYPE_LEVEL_LOW)>, /* Virtual */
 			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(6) | IRQ_TYPE_LEVEL_LOW)>; /* Hypervisor */
 		clock-frequency = <8000000>;
+		interrupt-parent = <&gic>;
 		arm,no-tick-in-suspend;
 	};
 
@@ -498,6 +501,29 @@
 				interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
 				#reset-cells = <1>;
 			};
+
+			gpc: gpc@...a0000 {
+				compatible = "fsl,imx8mm-gpc";
+				reg = <0x303a0000 0x10000>;
+				interrupt-parent = <&gic>;
+				interrupt-controller;
+				#interrupt-cells = <3>;
+
+				pgc {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					pgc_otg1: power-domain@2 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_USB_OTG1>;
+					};
+
+					pgc_otg2: power-domain@3 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_USB_OTG2>;
+					};
+				};
+			};
 		};
 
 		aips2: bus@...00000 {
@@ -790,6 +816,7 @@
 				assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_500M>;
 				fsl,usbphy = <&usbphynop1>;
 				fsl,usbmisc = <&usbmisc1 0>;
+				power-domains = <&pgc_otg1>;
 				status = "disabled";
 			};
 
@@ -809,6 +836,7 @@
 				assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_500M>;
 				fsl,usbphy = <&usbphynop2>;
 				fsl,usbmisc = <&usbmisc2 0>;
+				power-domains = <&pgc_otg2>;
 				status = "disabled";
 			};
 
@@ -856,6 +884,7 @@
 			#interrupt-cells = <3>;
 			interrupt-controller;
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&gic>;
 		};
 
 		ddr-pmu@...00000 {
-- 
2.17.1