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Message-ID: <20230725164104.273965-4-gatien.chevallier@foss.st.com>
Date: Tue, 25 Jul 2023 18:40:56 +0200
From: Gatien Chevallier <gatien.chevallier@...s.st.com>
To: <Oleksii_Moisieiev@...m.com>, <gregkh@...uxfoundation.org>,
<herbert@...dor.apana.org.au>, <davem@...emloft.net>,
<robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
<conor+dt@...nel.org>, <alexandre.torgue@...s.st.com>,
<vkoul@...nel.org>, <jic23@...nel.org>,
<olivier.moysan@...s.st.com>, <arnaud.pouliquen@...s.st.com>,
<mchehab@...nel.org>, <fabrice.gasnier@...s.st.com>,
<andi.shyti@...nel.org>, <ulf.hansson@...aro.org>,
<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
<hugues.fruchet@...s.st.com>, <lee@...nel.org>, <will@...nel.org>,
<catalin.marinas@....com>, <arnd@...nel.org>,
<richardcochran@...il.com>, Frank Rowand <frowand.list@...il.com>
CC: <linux-crypto@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <dmaengine@...r.kernel.org>,
<linux-i2c@...r.kernel.org>, <linux-iio@...r.kernel.org>,
<alsa-devel@...a-project.org>, <linux-media@...r.kernel.org>,
<linux-mmc@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-phy@...ts.infradead.org>, <linux-serial@...r.kernel.org>,
<linux-spi@...r.kernel.org>, <linux-usb@...r.kernel.org>,
Gatien Chevallier <gatien.chevallier@...s.st.com>
Subject: [PATCH v2 03/11] dt-bindings: bus: document ETZPC
Document ETZPC (Extended TrustZone protection controller). ETZPC is a
firewall controller.
Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
---
Changes in V2:
- Corrected errors highlighted by Rob's robot
- No longer define the maxItems for the "feature-domains"
property
- Fix example (node name, status)
- Declare "feature-domain-names" as an optional
property for child nodes
- Fix description of "feature-domains" property
- Reorder the properties so it matches RIFSC
- Add missing "feature-domain-controller" property
.../bindings/bus/st,stm32-etzpc.yaml | 96 +++++++++++++++++++
1 file changed, 96 insertions(+)
create mode 100644 Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
diff --git a/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml b/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
new file mode 100644
index 000000000000..ef5979c0d6f2
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/st,stm32-etzpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STM32 Extended TrustZone protection controller
+
+description: |
+ The ETZPC configures TrustZone security in a SoC having bus masters and
+ devices with programmable-security attributes (securable resources).
+
+maintainers:
+ - Gatien Chevallier <gatien.chevallier@...s.st.com>
+
+properties:
+ compatible:
+ contains:
+ const: st,stm32-etzpc
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 1
+
+ ranges: true
+
+ "#feature-domain-cells":
+ const: 1
+
+ feature-domain-controller: true
+
+patternProperties:
+ "^.*@[0-9a-f]+$":
+ description: Peripherals
+ type: object
+ properties:
+ feature-domains:
+ minItems: 1
+ description:
+ The phandle of the firewall controller of the peripheral and the
+ platform-specific firewall ID of the peripheral.
+
+ feature-domain-names:
+ minItems: 1
+
+ required:
+ - feature-domains
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+ - feature-domain-controller
+ - "#feature-domain-cells"
+ - ranges
+
+additionalProperties: false
+
+examples:
+ - |
+ // In this example, the usart2 device refers to rifsc as its domain
+ // controller.
+ // Access rights are verified before creating devices.
+
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/stm32mp13-clks.h>
+ #include <dt-bindings/reset/stm32mp13-resets.h>
+
+ etzpc: bus@...07000 {
+ compatible = "st,stm32-etzpc";
+ reg = <0x5c007000 0x400>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ feature-domain-controller;
+ #feature-domain-cells = <1>;
+ ranges;
+
+ usart2: serial@...01000 {
+ compatible = "st,stm32h7-uart";
+ reg = <0x4c001000 0x400>;
+ interrupts-extended = <&exti 27 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&rcc USART2_K>;
+ resets = <&rcc USART2_R>;
+ wakeup-source;
+ dmas = <&dmamux1 43 0x400 0x5>,
+ <&dmamux1 44 0x400 0x1>;
+ dma-names = "rx", "tx";
+ feature-domains = <&etzpc 17>;
+ };
+ };
--
2.35.3
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