Re: [PATCH v4 3/5] dt-bindings: bus: Add STM32 ETZPC firewall controller
From: Rob Herring <robh@kernel.org>
Date: 2020-07-13 17:05:47
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linux-devicetree, lkml
On Wed, Jul 01, 2020 at 03:25:21PM +0200, Benjamin Gaignard wrote:
quoted hunk ↗ jump to hunk
Document STM32 ETZPC firewall controller bindings Signed-off-by: Benjamin Gaignard <redacted> --- .../bindings/bus/stm32/st,stm32-etzpc.yaml | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yamldiff --git a/Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml b/Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml new file mode 100644 index 000000000000..d92865fda40c --- /dev/null +++ b/Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml@@ -0,0 +1,46 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bus/stm32/st,stm32-etzpc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STM32 Extended TrustZone Protection controller + +maintainers: + - Benjamin Gaignard <benjamin.gaignard@st.com> + +description: STMicroelectronics's STM32 firewall bus controller implementation + +allOf: + - $ref: "firewall-provider.yaml#" + - $ref: /schemas/simple-bus.yaml#
Your bus has controls/setup, it's not a simple-bus. Do you expect an old kernel or one with support for "st,stm32-etzpc-bus" disabled to work? How's it going to know if certain nodes can't be accessed without that support?
+
+properties:
+ compatible:
+ contains:
+ enum:
+ - st,stm32-etzpc-bus
+
+ reg:
+ maxItems: 1
+
+ '#firewall-cells':
+ const: 2
+
+required:
+ - compatible
+ - reg
+ - '#firewall-cells'
+
+examples:
+ - |
+ soc@5c007000 {
+ compatible = "st,stm32-etzpc-bus", "simple-bus";
+ reg = <0x5c007000 0x400>;
+ #firewall-cells = <2>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ };
+
+...
--
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