Re: [PATCH] dt-bindings: remoteproc: ti,wkup-m3: Convert to DT schema

[Mathieu Poirier]

On Sun, Jul 19, 2026 at 11:36:41PM +0530, Bhargav Joshi wrote:
> Convert Texas Instruments Wakeup M3 Remote Processor from text to Dt
> schema. Add optional resets and reset-names property which was missing
> from legacy binding. make ti,hwmods deprecated as it no longer needed,
> it is kept to support older board files without ti,sysc.
> 
> Signed-off-by: Bhargav Joshi <j.bhargav.u@xxxxxxxxx>
> ---
>  .../bindings/remoteproc/ti,am3352-wkup-m3.yaml     | 89 ++++++++++++++++++++++
>  .../bindings/remoteproc/wkup_m3_rproc.txt          | 52 -------------
>  2 files changed, 89 insertions(+), 52 deletions(-)
>

Applied.

Thanks,
Mathieu
 
> diff --git a/Documentation/devicetree/bindings/remoteproc/ti,am3352-wkup-m3.yaml b/Documentation/devicetree/bindings/remoteproc/ti,am3352-wkup-m3.yaml
> new file mode 100644
> index 000000000000..9e8a03acdec4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/ti,am3352-wkup-m3.yaml
> @@ -0,0 +1,89 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/ti,am3352-wkup-m3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI AM33xx/AM43xx Wakeup M3 Remote Processor
> +
> +maintainers:
> +  - Suman Anna <s-anna@xxxxxx>
> +  - Bhargav Joshi <j.bhargav.u@xxxxxxxxx>
> +
> +description:
> +  The TI AM33xx and AM43xx family of devices use a small Cortex M3 co-processor
> +  (commonly referred to as Wakeup M3 or CM3) to help with various low power
> +  tasks that cannot be controlled from the MPU. This CM3 processor requires a
> +  firmware binary to accomplish this. A wkup_m3 device node is used to
> +  represent the Wakeup M3 processor instance within the SoC. It is added as a
> +  child node of the parent interconnect bus (l4_wkup) through which it is
> +  accessible to the MPU.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,am3352-wkup-m3
> +      - ti,am4372-wkup-m3
> +
> +  reg:
> +    items:
> +      - description: Address range for UMEM
> +      - description: Address range for DMEM
> +
> +  reg-names:
> +    items:
> +      - const: umem
> +      - const: dmem
> +
> +  ti,pm-firmware:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    description:
> +      Name of firmware file to be used for loading and booting the wkup_m3
> +      remote processor.
> +
> +  resets:
> +    maxItems: 1
> +
> +  reset-names:
> +    items:
> +      - const: rstctrl
> +
> +  ti,hwmods:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    deprecated: true
> +    description:
> +      Name of the hwmod associated with the wkupm3 device.
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - ti,pm-firmware
> +
> +dependencies:
> +  resets: [reset-names]
> +  reset-names: [resets]
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    target-module@0 {
> +        compatible = "ti,sysc-omap4", "ti,sysc";
> +        reg = <0x0 0x4>;
> +        reg-names = "rev";
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        ranges = <0x00000000 0x00000000 0x4000>,
> +                 <0x00080000 0x00080000 0x2000>;
> +
> +        cpu@0 {
> +            compatible = "ti,am3352-wkup-m3";
> +            reg = <0x00000000 0x4000>,
> +                  <0x00080000 0x2000>;
> +            reg-names = "umem", "dmem";
> +            resets = <&prm_wkup 3>;
> +            reset-names = "rstctrl";
> +            ti,pm-firmware = "am335x-pm-firmware.elf";
> +        };
> +    };
> diff --git a/Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt b/Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt
> deleted file mode 100644
> index 3a70073797eb..000000000000
> --- a/Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt
> +++ /dev/null
> @@ -1,52 +0,0 @@
> -TI Wakeup M3 Remoteproc Driver
> -==============================
> -
> -The TI AM33xx and AM43xx family of devices use a small Cortex M3 co-processor
> -(commonly referred to as Wakeup M3 or CM3) to help with various low power tasks
> -that cannot be controlled from the MPU. This CM3 processor requires a firmware
> -binary to accomplish this. The wkup_m3 remoteproc driver handles the loading of
> -the firmware and booting of the CM3.
> -
> -Wkup M3 Device Node:
> -====================
> -A wkup_m3 device node is used to represent the Wakeup M3 processor instance
> -within the SoC. It is added as a child node of the parent interconnect bus
> -(l4_wkup) through which it is accessible to the MPU.
> -
> -Required properties:
> ---------------------
> -- compatible:		Should be one of,
> -				"ti,am3352-wkup-m3" for AM33xx SoCs
> -				"ti,am4372-wkup-m3" for AM43xx SoCs
> -- reg:			Should contain the address ranges for the two internal
> -			memory regions, UMEM and DMEM. The parent node should
> -			provide an appropriate ranges property for properly
> -			translating these into bus addresses.
> -- reg-names:		Contains the corresponding names for the two memory
> -			regions. These should be named "umem" & "dmem".
> -- ti,hwmods:		Name of the hwmod associated with the wkupm3 device.
> -- ti,pm-firmware:	Name of firmware file to be used for loading and
> -			booting the wkup_m3 remote processor.
> -
> -Example:
> ---------
> -/* AM33xx */
> -ocp {
> -	 l4_wkup: l4_wkup@44c00000 {
> -		compatible = "am335-l4-wkup", "simple-bus";
> -		ranges = <0 0x44c00000 0x400000>;
> -		#address-cells = <1>;
> -		#size-cells = <1>;
> -
> -		wkup_m3: wkup_m3@100000 {
> -			compatible = "ti,am3352-wkup-m3";
> -			reg = <0x100000 0x4000>,
> -			      <0x180000 0x2000>;
> -			reg-names = "umem", "dmem";
> -			ti,hwmods = "wkup_m3";
> -			ti,pm-firmware = "am335x-pm-firmware.elf";
> -		};
> -	};
> -
> -	...
> -};
> 
> ---
> base-commit: c6859eed755df351a3978b33cb92365f9b3e8f06
> change-id: 20260719-ti-wkup_m3-edac718d0d7c
> 
> Best regards,
> -- 
> Bhargav
>