[PATCH v2 0/3] Add support for ESM

[PATCH v2 0/3] Add support for ESM

[Neha Malcom Francis]

ESM (Error Signaling Module) is a fundamental IP responsible for
handling safety events. The driver currently present in U-Boot is
responsible for configuring ESM. This patch series adds dt-binding and
nodes for J721E and J7200. This goes towards end goal of having DTB sync
with that of U-Boot as well as ensuring completeness of hardware
description in devicetree.

Changes in v2:
	- misc/esm-k3.yaml -> hwmon/ti,j721e-esm.yaml
	- formatting changes in dt-binding
	- modified example in dt-binding

Neha Malcom Francis (3):
  dt-bindings: misc: esm: Add ESM support for TI K3 devices
  arm64: dts: ti: k3-j721e: Add ESM support
  arm64: dts: ti: k3-j7200: Add ESM support

 .../bindings/hwmon/ti,j721e-esm.yaml          | 55 +++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-j7200-main.dtsi     |  6 ++
 arch/arm64/boot/dts/ti/k3-j7200.dtsi          |  1 +
 arch/arm64/boot/dts/ti/k3-j721e.dtsi          |  1 +
 4 files changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml

-- 
2.34.1


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[PATCH v2 1/3] dt-bindings: misc: esm: Add ESM support for TI K3 devices

[Neha Malcom Francis]

Document the binding for TI K3 ESM (Error Signaling Module) block.

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
---
 .../bindings/hwmon/ti,j721e-esm.yaml          | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
new file mode 100644
index 000000000000..7b23ac7cb3ba
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Texas Instruments Incorporated
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/ti,j721e-esm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 ESM
+
+maintainers:
+  - Neha Malcom Francis <n-francis@ti.com>
+
+description:
+  The ESM (Error Signaling Module) is an IP block on TI K3 devices
+  that allows handling of safety events somewhat similar to what interrupt
+  controller would do. The safety signals have their separate paths within
+  the SoC, and they are handled by the ESM, which routes them to the proper
+  destination, which can be system reset, interrupt controller, etc. In the
+  simplest configuration the signals are just routed to reset the SoC.
+
+properties:
+  compatible:
+    const: ti,j721e-esm
+
+  reg:
+    items:
+      - description: the ESM register set
+
+  ti,esm-pins:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      integer array of ESM interrupt pins to route to external event pin
+      which can be used to reset the SoC.
+    minItems: 1
+    maxItems: 255
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - ti,esm-pins
+
+examples:
+  - |
+    cbass_main {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+        esm@700000 {
+            compatible = "ti,j721e-esm";
+            reg = <0x0 0x700000 0x0 0x1000>;
+            ti,esm-pins = <344>, <345>;
+        };
+    };
-- 
2.34.1


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[PATCH v2 2/3] arm64: dts: ti: k3-j721e: Add ESM support

[Neha Malcom Francis]

Add address entry mapping ESM on J721E.

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
---
 arch/arm64/boot/dts/ti/k3-j721e.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e.dtsi b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
index b912143b6a11..52bcde601eb8 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
@@ -131,6 +131,7 @@ cbass_main: bus@100000 {
 		#size-cells = <2>;
 		ranges = <0x00 0x00100000 0x00 0x00100000 0x00 0x00020000>, /* ctrl mmr */
 			 <0x00 0x00600000 0x00 0x00600000 0x00 0x00031100>, /* GPIO */
+			 <0x00 0x00700000 0x00 0x00700000 0x00 0x00001000>, /* ESM */
 			 <0x00 0x00900000 0x00 0x00900000 0x00 0x00012000>, /* serdes */
 			 <0x00 0x00a40000 0x00 0x00a40000 0x00 0x00000800>, /* timesync router */
 			 <0x00 0x06000000 0x00 0x06000000 0x00 0x00400000>, /* USBSS0 */
-- 
2.34.1


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[PATCH v2 3/3] arm64: dts: ti: k3-j7200: Add ESM support

[Neha Malcom Francis]

Add address entry mapping ESM on J7200.

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
---
 arch/arm64/boot/dts/ti/k3-j7200-main.dtsi | 6 ++++++
 arch/arm64/boot/dts/ti/k3-j7200.dtsi      | 1 +
 2 files changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
index ef352e32f19d..89f816f5e53d 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
@@ -1010,4 +1010,10 @@ main_r5fss0_core1: r5f@5d00000 {
 			ti,loczrama = <1>;
 		};
 	};
+
+	main_esm: esm@700000 {
+		compatible = "ti,j721e-esm";
+		reg = <0x0 0x700000 0x0 0x1000>;
+		ti,esm-pins = <656>, <657>;
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-j7200.dtsi b/arch/arm64/boot/dts/ti/k3-j7200.dtsi
index bbe380c72a7e..4998eb4fbe75 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200.dtsi
@@ -128,6 +128,7 @@ cbass_main: bus@100000 {
 		#size-cells = <2>;
 		ranges = <0x00 0x00100000 0x00 0x00100000 0x00 0x00020000>, /* ctrl mmr */
 			 <0x00 0x00600000 0x00 0x00600000 0x00 0x00031100>, /* GPIO */
+			 <0x00 0x00700000 0x00 0x00700000 0x00 0x00001000>, /* ESM */
 			 <0x00 0x00a40000 0x00 0x00a40000 0x00 0x00000800>, /* timesync router */
 			 <0x00 0x01000000 0x00 0x01000000 0x00 0x0d000000>, /* Most peripherals */
 			 <0x00 0x30000000 0x00 0x30000000 0x00 0x0c400000>, /* MAIN NAVSS */
-- 
2.34.1


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Re: [PATCH v2 1/3] dt-bindings: misc: esm: Add ESM support for TI K3 devices

[Krzysztof Kozlowski]

On 19/04/2023 11:25, Neha Malcom Francis wrote:
> Document the binding for TI K3 ESM (Error Signaling Module) block.
> 
> Signed-off-by: Neha Malcom Francis <n-francis@ti.com>

Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC.  It might happen, that command when run on an older
kernel, gives you outdated entries.  Therefore please be sure you base
your patches on recent Linux kernel.

> ---
>  .../bindings/hwmon/ti,j721e-esm.yaml          | 55 +++++++++++++++++++
>  1 file changed, 55 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> new file mode 100644
> index 000000000000..7b23ac7cb3ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> @@ -0,0 +1,55 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 Texas Instruments Incorporated
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/ti,j721e-esm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments K3 ESM
> +
> +maintainers:
> +  - Neha Malcom Francis <n-francis@ti.com>
> +
> +description:
> +  The ESM (Error Signaling Module) is an IP block on TI K3 devices
> +  that allows handling of safety events somewhat similar to what interrupt
> +  controller would do. The safety signals have their separate paths within
> +  the SoC, and they are handled by the ESM, which routes them to the proper
> +  destination, which can be system reset, interrupt controller, etc. In the
> +  simplest configuration the signals are just routed to reset the SoC.
> +
> +properties:
> +  compatible:
> +    const: ti,j721e-esm
> +
> +  reg:
> +    items:
> +      - description: the ESM register set
> +
> +  ti,esm-pins:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description:
> +      integer array of ESM interrupt pins to route to external event pin
> +      which can be used to reset the SoC.
> +    minItems: 1
> +    maxItems: 255
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - ti,esm-pins
> +
> +examples:
> +  - |
> +    cbass_main {

No underscores in node names, Node names should be generic.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

> +      #address-cells = <2>;
> +      #size-cells = <2>;

Broken indentation.

> +
> +        esm@700000 {
> +            compatible = "ti,j721e-esm";
> +            reg = <0x0 0x700000 0x0 0x1000>;
> +            ti,esm-pins = <344>, <345>;
> +        };
> +    };

Best regards,
Krzysztof


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Re: [PATCH v2 1/3] dt-bindings: misc: esm: Add ESM support for TI K3 devices

[Rob Herring]

On Wed, Apr 19, 2023 at 02:55:57PM +0530, Neha Malcom Francis wrote:
> Document the binding for TI K3 ESM (Error Signaling Module) block.
> 
> Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
> ---
>  .../bindings/hwmon/ti,j721e-esm.yaml          | 55 +++++++++++++++++++
>  1 file changed, 55 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> new file mode 100644
> index 000000000000..7b23ac7cb3ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> @@ -0,0 +1,55 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 Texas Instruments Incorporated
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/ti,j721e-esm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments K3 ESM
> +
> +maintainers:
> +  - Neha Malcom Francis <n-francis@ti.com>
> +
> +description:
> +  The ESM (Error Signaling Module) is an IP block on TI K3 devices
> +  that allows handling of safety events somewhat similar to what interrupt
> +  controller would do. The safety signals have their separate paths within
> +  the SoC, and they are handled by the ESM, which routes them to the proper
> +  destination, which can be system reset, interrupt controller, etc. In the
> +  simplest configuration the signals are just routed to reset the SoC.
> +
> +properties:
> +  compatible:
> +    const: ti,j721e-esm
> +
> +  reg:
> +    items:
> +      - description: the ESM register set

That's kind of obvious... Just 'maxItems: 1' is sufficient here.

> +
> +  ti,esm-pins:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description:
> +      integer array of ESM interrupt pins to route to external event pin
> +      which can be used to reset the SoC.
> +    minItems: 1
> +    maxItems: 255
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - ti,esm-pins
> +
> +examples:
> +  - |
> +    cbass_main {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +        esm@700000 {
> +            compatible = "ti,j721e-esm";
> +            reg = <0x0 0x700000 0x0 0x1000>;
> +            ti,esm-pins = <344>, <345>;
> +        };
> +    };
> -- 
> 2.34.1
> 

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