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Merge tag 'scpi-updates-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/drivers

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Pull "SCPI updates for v4.10" from Sudeep Holla:

1. Adds support for pre-v1.0 SCPI protocol versions

2. Adds support for SCPI used on Amlogic GXBB SoC platforms using the
   newly added pre-v1.0 SCPI protocol

3. Decouples some platform specific details from generic SCPI binding

* tag 'scpi-updates-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_scpi: add support for pre-v1.0 SCPI compatible
  Documentation: bindings: Add support for Amlogic GXBB SCPI protocol
  Documentation: bindings: add compatible specific to pre v1.0 SCPI protocols
  Documentation: bindings: decouple juno specific details from generic binding
  firmware: arm_scpi: allow firmware with get_capabilities not implemented
  firmware: arm_scpi: add alternative legacy structures, functions and macros
  firmware: arm_scpi: increase MAX_DVFS_OPPS to 16 entries
  firmware: arm_scpi: add command indirection to support legacy commands
This commit is contained in:
Arnd Bergmann
2016-11-30 17:01:23 +01:00
parent bc28ba81db 8358c6b5fc
commit e7541f90d4
4 changed files with 301 additions and 46 deletions
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20
Documentation/devicetree/bindings/arm/amlogic,scpi.txt Normal file
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@@ -0,0 +1,20 @@
System Control and Power Interface (SCPI) Message Protocol
(in addition to the standard binding in [0])
----------------------------------------------------------
Required properties
- compatible : should be "amlogic,meson-gxbb-scpi"
AMLOGIC SRAM and Shared Memory for SCPI
------------------------------------
Required properties:
- compatible : should be "amlogic,meson-gxbb-sram"
Each sub-node represents the reserved area for SCPI.
Required sub-node properties:
- compatible : should be "amlogic,meson-gxbb-scp-shmem" for SRAM based shared
memory on Amlogic GXBB SoC.
[0] Documentation/devicetree/bindings/arm/arm,scpi.txt

25
Documentation/devicetree/bindings/arm/arm,scpi.txt
View File

@@ -7,7 +7,10 @@ by Linux to initiate various system control and power operations.
Required properties:
- compatible : should be "arm,scpi"
- compatible : should be
* "arm,scpi" : For implementations complying to SCPI v1.0 or above
* "arm,scpi-pre-1.0" : For implementations complying to all
unversioned releases prior to SCPI v1.0
- mboxes: List of phandle and mailbox channel specifiers
All the channels reserved by remote SCP firmware for use by
SCPI message protocol should be specified in any order
@@ -59,18 +62,14 @@ SRAM and Shared Memory for SCPI
A small area of SRAM is reserved for SCPI communication between application
processors and SCP.
Required properties:
- compatible : should be "arm,juno-sram-ns" for Non-secure SRAM on Juno
The rest of the properties should follow the generic mmio-sram description
found in ../../sram/sram.txt
The properties should follow the generic mmio-sram description found in [3]
Each sub-node represents the reserved area for SCPI.
Required sub-node properties:
- reg : The base offset and size of the reserved area with the SRAM
- compatible : should be "arm,juno-scp-shmem" for Non-secure SRAM based
shared memory on Juno platforms
- compatible : should be "arm,scp-shmem" for Non-secure SRAM based
shared memory
Sensor bindings for the sensors based on SCPI Message Protocol
--------------------------------------------------------------
@@ -81,11 +80,9 @@ Required properties:
- #thermal-sensor-cells: should be set to 1. This property follows the
thermal device tree bindings[2].
Valid cell values are raw identifiers (Sensor
ID) as used by the firmware. Refer to
platform documentation for your
implementation for the IDs to use. For Juno
R0 and Juno R1 refer to [3].
Valid cell values are raw identifiers (Sensor ID)
as used by the firmware. Refer to platform details
for your implementation for the IDs to use.
Power domain bindings for the power domains based on SCPI Message Protocol
------------------------------------------------------------
@@ -112,7 +109,7 @@ Required properties:
[0] http://infocenter.arm.com/help/topic/com.arm.doc.dui0922b/index.html
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
[2] Documentation/devicetree/bindings/thermal/thermal.txt
[3] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0922b/apas03s22.html
[3] Documentation/devicetree/bindings/sram/sram.txt
[4] Documentation/devicetree/bindings/power/power_domain.txt
Example:

26
Documentation/devicetree/bindings/arm/juno,scpi.txt Normal file
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@@ -0,0 +1,26 @@
System Control and Power Interface (SCPI) Message Protocol
(in addition to the standard binding in [0])
Juno SRAM and Shared Memory for SCPI
------------------------------------
Required properties:
- compatible : should be "arm,juno-sram-ns" for Non-secure SRAM
Each sub-node represents the reserved area for SCPI.
Required sub-node properties:
- reg : The base offset and size of the reserved area with the SRAM
- compatible : should be "arm,juno-scp-shmem" for Non-secure SRAM based
shared memory on Juno platforms
Sensor bindings for the sensors based on SCPI Message Protocol
--------------------------------------------------------------
Required properties:
- compatible : should be "arm,scpi-sensors".
- #thermal-sensor-cells: should be set to 1.
For Juno R0 and Juno R1 refer to [1] for the
sensor identifiers
[0] Documentation/devicetree/bindings/arm/arm,scpi.txt
[1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0922b/apas03s22.html