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 v3:
- formatting changes in dt-binding
- modified example in dt-binding cbass_main -> bus
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 | 53 +++++++++++++++++++
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, 61 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
--
2.34.1
Add address entry mapping ESM on J721E.
Signed-off-by: Neha Malcom Francis <[email protected]>
---
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
Document the binding for TI K3 ESM (Error Signaling Module) block.
Signed-off-by: Neha Malcom Francis <[email protected]>
---
.../bindings/hwmon/ti,j721e-esm.yaml | 53 +++++++++++++++++++
1 file changed, 53 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..c5eb7f46cc46
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
@@ -0,0 +1,53 @@
+# 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 <[email protected]>
+
+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:
+ maxItems: 1
+
+ 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:
+ - |
+ bus {
+ #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
Add address entry mapping ESM on J7200.
Signed-off-by: Neha Malcom Francis <[email protected]>
---
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
On 24/04/2023 11:53, Neha Malcom Francis wrote:
> Document the binding for TI K3 ESM (Error Signaling Module) block.
>
> Signed-off-by: Neha Malcom Francis <[email protected]>
> ---
> .../bindings/hwmon/ti,j721e-esm.yaml | 53 +++++++++++++++++++
> 1 file changed, 53 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
>
Use subject prefixes matching the subsystem (which you can get for
example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
your patch is touching). misc->hwmon
> 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..c5eb7f46cc46
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/ti,j721e-esm.yaml
> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 Texas Instruments Incorporated
> +%YAML 1.2
Best regards,
Krzysztof