Commit 7418111f authored by Kapil Hali's avatar Kapil Hali Committed by Florian Fainelli

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: default avatarKapil Hali <kapilh@broadcom.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
parent ea2d8975
Broadcom Northstar Plus SoC CPU Enable Method
---------------------------------------------
This binding defines the enable method used for starting secondary
CPU 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 corresponding secondary "cpu" 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>;
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>;
enable-method = "brcm,bcm-nsp-smp";
secondary-boot-reg = <0xffff042c>;
reg = <1>;
};
};
...@@ -190,6 +190,7 @@ nodes to be present and contain the properties described below. ...@@ -190,6 +190,7 @@ nodes to be present and contain the properties described below.
"allwinner,sun6i-a31" "allwinner,sun6i-a31"
"allwinner,sun8i-a23" "allwinner,sun8i-a23"
"arm,psci" "arm,psci"
"brcm,bcm-nsp-smp"
"brcm,brahma-b15" "brcm,brahma-b15"
"marvell,armada-375-smp" "marvell,armada-375-smp"
"marvell,armada-380-smp" "marvell,armada-380-smp"
......
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