diff mbox series

[IGNORE,v3,01/11] dt-bindings: Document common device controller bindings

Message ID 20230726083810.232100-2-gatien.chevallier@foss.st.com
State Superseded
Headers show
Series Introduce STM32 Firewall framework | expand

Commit Message

Gatien CHEVALLIER July 26, 2023, 8:38 a.m. UTC
From: Oleksii Moisieiev <Oleksii_Moisieiev@epam.com>

Introducing of the common device controller bindings for the controller
provider and consumer devices. Those bindings are intended to allow
divided system on chip into muliple domains, that can be used to
configure hardware permissions.

Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
---
 .../feature-domain-controller.yaml            | 84 +++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml

Comments

Gatien CHEVALLIER July 26, 2023, 9:04 a.m. UTC | #1
Hello Greg,

On 7/26/23 10:48, Greg KH wrote:
> On Wed, Jul 26, 2023 at 10:38:00AM +0200, Gatien Chevallier wrote:
>> From: Oleksii Moisieiev <Oleksii_Moisieiev@epam.com>
>>
>> Introducing of the common device controller bindings for the controller
>> provider and consumer devices. Those bindings are intended to allow
>> divided system on chip into muliple domains, that can be used to
>> configure hardware permissions.
>>
>> Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
>> ---
>>   .../feature-domain-controller.yaml            | 84 +++++++++++++++++++
>>   1 file changed, 84 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml
> 
> What is the [IGNORE] prefix for?
> 

I put this prefix to specify that the review for this patch should
not be done on this thread.

It is still under review on the thread linked in the cover-letter.

This series aims to provide a use-case for this binding so its scope
can be better defined.

Best regards,
Gatien
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml b/Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml
new file mode 100644
index 000000000000..90a7c38c833c
--- /dev/null
+++ b/Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml
@@ -0,0 +1,84 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/feature-controllers/feature-domain-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic Domain Controller bindings
+
+maintainers:
+  - Oleksii Moisieiev <oleksii_moisieiev@epam.com>
+
+description: |+
+  Common Feature Domains Controller bindings properties
+
+  Domain controllers allow to divided system on chip into multiple feature
+  domains that can be used to select by who hardware blocks could be accessed.
+  A feature domain could be a cluster of CPUs (or coprocessors), a range of
+  addresses or a group of hardware blocks.
+
+  This device tree bindings can be used to bind feature domain consumer devices
+  with their feature domains provided by feature-domains controllers.
+  Feature omain controller provider can be represened by any node in the
+  device tree and can provide one or more configuration parameters, needed to
+  control parameters of the consumer device. A consumer node can refer to the
+  provider by phandle and a set of phandle arguments, specified by
+  '#feature-domain-cells' property in the device controller provider node.
+
+  Device controllers are typically used to set the permissions of the hardware
+  block. The contents of the feature-domains configuration properties are
+  defined by the binding for the individual feature-domains controller device.
+
+  Each node can be a consumer for the several providers. The first
+  configuration of 'feature-domains' or the one named 'default' is applied
+  before probing the device itself.
+
+# always select the core schema
+select: true
+
+properties:
+  '#feature-domain-cells':
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Number of cells in a feature-domains controller specifier;
+      Can be any value as specified by device tree binding documentation
+      of a particular provider.
+
+  feature-domain-controller:
+    description:
+      Indicates that the node is feature-domain-controller provider.
+
+  feature-domain-names:
+    $ref: '/schemas/types.yaml#/definitions/string-array'
+    description:
+      A list of feature-domains names, sorted in the same order as
+      feature-domains entries. Consumer drivers will use feature-domain-names
+      to match with existing feature-domains entries.
+
+  feature-domains:
+    $ref: "/schemas/types.yaml#/definitions/phandle-array"
+    description:
+      A list of feature-domains controller specifiers, as defined by the
+      bindings of the feature-domain-controller provider.
+
+additionalProperties: true
+
+examples:
+  - |
+    ctrl0: ctrl@100 {
+        feature-domain-controller;
+        reg = <0x100 0x10>;
+        #feature-domain-cells = <2>;
+    };
+
+    ctrl1: ctrl@110 {
+        feature-domain-controller;
+        reg = <0x110 0x10>;
+        #feature-domain-cells = <3>;
+    };
+
+    foo@0 {
+        reg = <0x0 0x1>;
+        feature-domains = <&ctrl0 1 2>, <&ctrl1 3 4 5>;
+        feature-domain-names = "default", "unbind";
+    };