lkml.org 
[lkml]   [2022]   [Apr]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH 1/6] dt-bindings: ti,sci: Add ti,ctx-memory-region property
From
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@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

\
 
 \ /
  Last update: 2022-04-23 10:45    [W:0.201 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site