On 10/15/2015 3:57 AM, Hauke Mehrtens wrote:
> On 10/14/2015 07:46 PM, Kapil Hali wrote:
>> 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 pen-release mechanism.
>>
>> Signed-off-by: Kapil Hali
>> ---
>> .../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 000..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 = <0x042c>;
>
> Isn't this some offset in a SRAM? If this is a SRAM it should be handled
> like it is done in some other SoC code.
>
It is an internal SKU region. Is it handled differently in rest of the
SoCs? What is that method?
>> +
>> +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..1172d9b 100644
>> --- 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 properties described
>> below.
>> "allwinner,sun6i-a31"
>> "allwinner,sun8i-a23"
>> "arm,psci"
>> +"brcm,bcm-nsp-smp"
>> "brcm,brahma-b15"
>> "marvell,armada-375-smp"
>> "marvell,armada-380-smp"
>>
>
Thanks,
Kapil
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