linux-kernel - [PATCH v3 13/15] [NOT FOR MERGE] arm64: dts: allwinner: a64: Add interrupt controller node

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Date:   Fri,  1 Mar 2019 22:29:49 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, Samuel Holland <samuel@...lland.org>
Subject: [PATCH v3 13/15] [NOT FOR MERGE] arm64: dts: allwinner: a64: Add interrupt controller node

In order to give firmware full access to r_intc, Linux needs to avoid
using it in the device tree. Most IRQ lines attached to r_intc are also
attached to the GIC. Unfortunately, the NMI is not. For it to be used in
Linux, we have to forward it in firmware over the mailbox.

Add a node representing this virtual interrupt controller.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 29ee8f0f833a..63e33215dea0 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -128,6 +128,14 @@
 		status = "disabled";
 	};
 
+	msgbox_intc: interrupt-controller {
+		compatible = "allwinner,sunxi-msgbox-intc";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		mboxes = <&msgbox 6>, <&msgbox 7>;
+		mbox-names = "tx", "rx";
+	};
+
 	osc24M: osc24M_clk {
 		#clock-cells = <0>;
 		compatible = "fixed-clock";
-- 
2.19.2