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Commit 31bda09d authored by Chris Brand's avatar Chris Brand Committed by Florian Fainelli
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Documentation: devicetree: Document BCM23550 bindings 



Add binding document for Broadcom BCM23550 SoC.

BCM23550 has a Cluster Dormant Control IP block that holds cores
in an idle state. Introduce a new CPU enable method in which the CDC is
accessed to bring the core online.

Signed-off-by: default avatarChris Brand <chris.brand@broadcom.com>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
parent 5f79985d

Documentation/devicetree/bindings/arm/bcm/brcm,bcm23550-cpu-method.txt

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Broadcom Kona Family CPU Enable Method

--------------------------------------

This binding defines the enable method used for starting secondary

CPUs in the following Broadcom SoCs:

  BCM23550



The enable method is specified by defining the following required

properties in the "cpu" device tree node:

  - enable-method = "brcm,bcm23550";

  - 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.  The value written to the register is

formed by encoding the target CPU id into the low bits of the

physical start address it should jump to.



Example:

	cpus {

		#address-cells = <1>;

		#size-cells = <0>;



		cpu0: cpu@0 {

			device_type = "cpu";

			compatible = "arm,cortex-a9";

			reg = <0>;

		};



		cpu1: cpu@1 {

			device_type = "cpu";

			compatible = "arm,cortex-a9";

			reg = <1>;

			enable-method = "brcm,bcm23550";

			secondary-boot-reg = <0x3500417c>;

		};

	};

Documentation/devicetree/bindings/arm/bcm/brcm,bcm23550.txt

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Broadcom BCM23550 device tree bindings

--------------------------------------



This document describes the device tree bindings for boards with the BCM23550

SoC.



Required root node property:

  - compatible: brcm,bcm23550



Example:

	/ {

		model = "BCM23550 SoC";

		compatible = "brcm,bcm23550";

		[...]

	}

Documentation/devicetree/bindings/arm/cpus.txt

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@@ -194,6 +194,7 @@ nodes to be present and contain the properties described below. 
			    "allwinner,sun8i-a23"

			    "arm,realview-smp"

			    "brcm,bcm11351-cpu-method"

			    "brcm,bcm23550"

			    "brcm,bcm-nsp-smp"

			    "brcm,brahma-b15"

			    "marvell,armada-375-smp"