[v3,5/7] dt-bindings: remoteproc: Add compatibility for TEE support
Commit Message
The "st,stm32mp1-m4-tee" compatible is utilized in a system configuration
where the Cortex-M4 firmware is loaded by the Trusted execution Environment
(TEE).
For instance, this compatible is used in both the Linux and OP-TEE
device-tree:
- In OP-TEE, a node is defined in the device tree with the
st,stm32mp1-m4-tee to support signed remoteproc firmware.
Based on DT properties, OP-TEE authenticates, loads, starts, and stops
the firmware.
- On Linux, when the compatibility is set, the Cortex-M resets should not
be declared in the device tree.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
V1 to V2 updates
- update "st,stm32mp1-m4" compatible description to generalize
- remove the 'reset-names' requirement in one conditional branch, as the
property is already part of the condition test.
---
.../bindings/remoteproc/st,stm32-rproc.yaml | 51 ++++++++++++++++---
1 file changed, 43 insertions(+), 8 deletions(-)
Comments
On Wed, 14 Feb 2024 18:21:25 +0100, Arnaud Pouliquen wrote:
> The "st,stm32mp1-m4-tee" compatible is utilized in a system configuration
> where the Cortex-M4 firmware is loaded by the Trusted execution Environment
> (TEE).
> For instance, this compatible is used in both the Linux and OP-TEE
> device-tree:
> - In OP-TEE, a node is defined in the device tree with the
> st,stm32mp1-m4-tee to support signed remoteproc firmware.
> Based on DT properties, OP-TEE authenticates, loads, starts, and stops
> the firmware.
> - On Linux, when the compatibility is set, the Cortex-M resets should not
> be declared in the device tree.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
> V1 to V2 updates
> - update "st,stm32mp1-m4" compatible description to generalize
> - remove the 'reset-names' requirement in one conditional branch, as the
> property is already part of the condition test.
> ---
> .../bindings/remoteproc/st,stm32-rproc.yaml | 51 ++++++++++++++++---
> 1 file changed, 43 insertions(+), 8 deletions(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
@@ -16,7 +16,12 @@ maintainers:
properties:
compatible:
- const: st,stm32mp1-m4
+ enum:
+ - st,stm32mp1-m4
+ - st,stm32mp1-m4-tee
+ description:
+ Use "st,stm32mp1-m4" for the Cortex-M4 coprocessor management by non-secure context
+ Use "st,stm32mp1-m4-tee" for the Cortex-M4 coprocessor management by secure context
reg:
description:
@@ -142,21 +147,41 @@ properties:
required:
- compatible
- reg
- - resets
allOf:
- if:
properties:
- reset-names:
- not:
- contains:
- const: hold_boot
+ compatible:
+ contains:
+ const: st,stm32mp1-m4
then:
+ if:
+ properties:
+ reset-names:
+ not:
+ contains:
+ const: hold_boot
+ then:
+ required:
+ - st,syscfg-holdboot
+ else:
+ properties:
+ st,syscfg-holdboot: false
+ required:
+ - reset-names
required:
- - st,syscfg-holdboot
- else:
+ - resets
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: st,stm32mp1-m4-tee
+ then:
properties:
st,syscfg-holdboot: false
+ reset-names: false
+ resets: false
additionalProperties: false
@@ -188,5 +213,15 @@ examples:
st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;
};
+ - |
+ #include <dt-bindings/reset/stm32mp1-resets.h>
+ m4@10000000 {
+ compatible = "st,stm32mp1-m4-tee";
+ reg = <0x10000000 0x40000>,
+ <0x30000000 0x40000>,
+ <0x38000000 0x10000>;
+ st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
+ st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;
+ };
...