linux-kernel - [PATCH 3/6] arm64: dts: Add syscon based reboot in DT for NS2

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Date:	Fri, 2 Oct 2015 23:24:20 +0530
From:	Anup Patel <anup.patel@...adcom.com>
To:	<linux-arm-kernel@...ts.infradead.org>
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	"Mark Rutland" <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"Catalin Marinas" <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>, Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vikram Prakash <vikramp@...adcom.com>,
	Anup Patel <anup.patel@...adcom.com>,
	Pramod KUMAR <pramodku@...adcom.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<bcm-kernel-feedback-list@...adcom.com>
Subject: [PATCH 3/6] arm64: dts: Add syscon based reboot in DT for NS2

To reset NS2, we simply have to write '0' to BIT[1] at offset 0x90
of CRMU space.

The above can be easily achieved by writing 0xfffffffd at offset 0x90
using syscon-reboot driver. We don't need to have separate driver for
rebooting NS2.

This patch enables syscon-reboot driver for NS2 using DT.

Signed-off-by: Anup Patel <anup.patel@...adcom.com>
Reviewed-by: Ray Jui <rjui@...adcom.com>
Reviewed-by: Scott Branden <sbranden@...adcom.com>
---
 arch/arm64/boot/dts/broadcom/ns2.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/ns2.dtsi b/arch/arm64/boot/dts/broadcom/ns2.dtsi
index c5d90e4..5d2ac6b 100644
--- a/arch/arm64/boot/dts/broadcom/ns2.dtsi
+++ b/arch/arm64/boot/dts/broadcom/ns2.dtsi
@@ -144,6 +144,18 @@
 			mmu-masters;
 		};
 
+		crmu: crmu@...24000 {
+			compatible = "syscon";
+			reg = <0x65024000 0x100>;
+		};
+
+		reboot@...24000 {
+			compatible ="syscon-reboot";
+			regmap = <&crmu>;
+			offset = <0x90>;
+			mask = <0xfffffffd>;
+		};
+
 		gic: interrupt-controller@...10000 {
 			compatible = "arm,gic-400";
 			#interrupt-cells = <3>;
-- 
1.9.1

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