[PATCH 1/6] dt-bindings: ti,sci: Add ti,ctx-memory-region property
Dave Gerlach
d-gerlach at ti.com
Fri Apr 22 12:10:52 PDT 2022
Hi,
On 4/22/22 14:02, Andrew Davis wrote:
> On 4/21/22 3:36 PM, Dave Gerlach wrote:
>> Add documentation for the ti,ctx-memory-region property which is a
>> phandle to a reserved-memory carveout to be used by the ti_sci driver
>> storage of low power mode memory context. This is optional for normal
>> system operation but required to enabled suspend-to-mem usage of Deep
>> Sleep state.
>>
>> Signed-off-by: Dave Gerlach <d-gerlach at ti.com>
>> ---
>> .../devicetree/bindings/arm/keystone/ti,sci.yaml | 9 +++++++++
>> 1 file changed, 9 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
>> index 34f5f877d444..ec88aa88a2a0 100644
>> --- a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
>> +++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
>> @@ -61,6 +61,15 @@ properties:
>> mboxes:
>> minItems: 2
>>
>> + ti,ctx-memory-region:
>> + description:
>> + Phandle to the reserved memory node to be associated with the
>> + ti-sci device, to be used for saving low power context. The
>> + reserved memory node should be a carveout node, and should
>> + be defined as per the bindings in
>> + Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml
>> + $ref: /schemas/types.yaml#/definitions/string
>> +
>
>
> Why does this have to be yet another reserved carveout region,
> should be dynamically allocated.
>
This must be a fixed address in order to support other low power modes
which have not yet been introduced.
Regards,
Dave
> Andrew
>
>
>> ti,system-reboot-controller:
>> description: Determines If system reboot can be triggered by SoC reboot
>> type: boolean
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