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- From 204b9dbd7c4bd5a223fd104b9cba56c12fe04add Mon Sep 17 00:00:00 2001
- From: Kapil Hali <kapilh@broadcom.com>
- Date: Wed, 19 Aug 2015 13:42:23 -0400
- Subject: [PATCH 130/134] 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@broadcom.com>
- ---
- .../bindings/arm/bcm/brcm,nsp-cpu-method.txt | 39 ++++++++++++++++++++++
- Documentation/devicetree/bindings/arm/cpus.txt | 1 +
- 2 files changed, 40 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
- --- /dev/null
- +++ b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
- @@ -0,0 +1,39 @@
- +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 which should hold the common
- +entry point for a secondary CPU. This entry is cpu node specific
- +and should be added per cpu. E.g., in case of NSP (BCM58625) which
- +is a dual core CPU SoC, this entry should be added to cpu1 node.
- +
- +
- +Example:
- + cpus {
- + #address-cells = <1>;
- + #size-cells = <0>;
- + enable-method = "brcm,bcm-nsp-smp";
- +
- + 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>;
- + secondary-boot-reg = <0xffff042c>;
- + };
- + };
- --- a/Documentation/devicetree/bindings/arm/cpus.txt
- +++ b/Documentation/devicetree/bindings/arm/cpus.txt
- @@ -190,6 +190,7 @@ nodes to be present and contain the prop
- "allwinner,sun6i-a31"
- "allwinner,sun8i-a23"
- "arm,psci"
- + "brcm,bcm-nsp-smp"
- "brcm,brahma-b15"
- "marvell,armada-375-smp"
- "marvell,armada-380-smp"
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