linux-kernel - [PATCH RESEND v2 1/4] dt-bindings: add SMP enable-method for Broadcom NSP

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Message-ID: <1446839371-22601-2-git-send-email-kapilh@broadcom.com>
Date:	Fri, 6 Nov 2015 14:49:28 -0500
From:	Kapil Hali <kapilh@...adcom.com>
To:	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>,
	"Russell King" <linux@....linux.org.uk>,
	Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Jon Mason <jonmason@...adcom.com>,
	Florian Fainelli <f.fainelli@...il.com>
CC:	Gregory Fong <gregory.0xf0@...il.com>, Lee Jones <lee@...nel.org>,
	"Hauke Mehrtens" <hauke@...ke-m.de>,
	Heiko Stuebner <heiko@...ech.de>,
	Kever Yang <kever.yang@...k-chips.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Olof Johansson <olof@...om.net>,
	"Paul Walmsley" <paul@...an.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Chen-Yu Tsai <wens@...e.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	<bcm-kernel-feedback-list@...adcom.com>,
	Kapil Hali <kapilh@...adcom.com>
Subject: [PATCH RESEND v2 1/4] dt-bindings: add SMP enable-method for Broadcom NSP

Add a compatible string "brcm,bcm-nsp-smp" for Broadcom's
Northstar Plus CPU to the 32-bit ARM CPU device tree binding
documentation file and create a new binding documentation for
Northstar Plus CPU.

Signed-off-by: Kapil Hali <kapilh@...adcom.com>
---
 .../bindings/arm/bcm/brcm,nsp-cpu-method.txt       | 36 ++++++++++++++++++++++
 Documentation/devicetree/bindings/arm/cpus.txt     |  1 +
 2 files changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt

diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
new file mode 100644
index 0000000..8506da7
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
@@ -0,0 +1,36 @@
+Broadcom Northstar Plus SoC CPU Enable Method
+---------------------------------------------
+This binding defines the enable method used for starting secondary
+CPUs in the following Broadcom SoCs:
+  BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312
+
+The enable method is specified by defining the following required
+properties in the "cpus" device tree node:
+  - enable-method = "brcm,bcm-nsp-smp";
+  - secondary-boot-reg = <...>;
+
+The secondary-boot-reg property is a u32 value that specifies the
+physical address of the register used to request the ROM holding pen
+code release a secondary CPU.
+
+Example:
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		enable-method = "brcm,bcm-nsp-smp";
+		secondary-boot-reg = <0xffff042c>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			next-level-cache = <&L2>;
+			reg = <0>;
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			next-level-cache = <&L2>;
+			reg = <1>;
+		};
+	};
diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index 91e6e5c..6abe3f3 100644
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ b/Documentation/devicetree/bindings/arm/cpus.txt
@@ -191,6 +191,7 @@ nodes to be present and contain the properties described below.
 			    "allwinner,sun8i-a23"
 			    "arm,psci"
 			    "brcm,brahma-b15"
+			    "brcm,bcm-nsp-smp"
 			    "marvell,armada-375-smp"
 			    "marvell,armada-380-smp"
 			    "marvell,armada-390-smp"
-- 
2.1.0

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