[PATCH] dt-bindings: mtd: st,spear600-smi: convert to DT schema

[Akhila YS]

On 10-02-2026 19:17, Rob Herring wrote:
> On Thu, Jan 22, 2026 at 10:23 AM Akhila YS <akhilayalmati at gmail.com> wrote:
>> Convert STMicroelectronics SPEAr600 Serial Memory Interface (SMI)
>> Controller binding to YAML format.
>>
>> Signed-off-by: Akhila YS <akhilayalmati at gmail.com>
>> ---
>>  .../devicetree/bindings/mtd/spear_smi.txt          | 29 ---------
>>  .../devicetree/bindings/mtd/st,spear600-smi.yaml   | 72 ++++++++++++++++++++++
>>  2 files changed, 72 insertions(+), 29 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/spear_smi.txt b/Documentation/devicetree/bindings/mtd/spear_smi.txt
>> deleted file mode 100644
>> index c41873e92d26..000000000000
>> --- a/Documentation/devicetree/bindings/mtd/spear_smi.txt
>> +++ /dev/null
>> @@ -1,29 +0,0 @@
>> -* SPEAr SMI
>> -
>> -Required properties:
>> -- compatible : "st,spear600-smi"
>> -- reg : Address range of the mtd chip
>> -- #address-cells, #size-cells : Must be present if the device has sub-nodes
>> -  representing partitions.
>> -- interrupts: Should contain the STMMAC interrupts
>> -- clock-rate : Functional clock rate of SMI in Hz
>> -
>> -Optional properties:
>> -- st,smi-fast-mode : Flash supports read in fast mode
>> -
>> -Example:
>> -
>> -       smi: flash at fc000000 {
>> -               compatible = "st,spear600-smi";
>> -               #address-cells = <1>;
>> -               #size-cells = <1>;
>> -               reg = <0xfc000000 0x1000>;
>> -               interrupt-parent = <&vic1>;
>> -               interrupts = <12>;
>> -               clock-rate = <50000000>;        /* 50MHz */
>> -
>> -               flash at f8000000 {
>> -                       st,smi-fast-mode;
>> -                       ...
>> -               };
>> -       };
>> diff --git a/Documentation/devicetree/bindings/mtd/st,spear600-smi.yaml b/Documentation/devicetree/bindings/mtd/st,spear600-smi.yaml
>> new file mode 100644
>> index 000000000000..8fe27aae7527
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mtd/st,spear600-smi.yaml
>> @@ -0,0 +1,72 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mtd/st,spear600-smi.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: STMicroelectronics SPEAr600 Serial Memory Interface (SMI) Controller
>> +
>> +maintainers:
>> +  - Richard Weinberger <richard at nod.at>
>> +
>> +description:
>> +  The SPEAr600 Serial Memory Interface (SMI) is a dedicated serial flash
>> +  controller supporting up to four chip selects for serial NOR flashes
>> +  connected in parallel. The controller is memory-mapped and the attached
>> +  flash devices appear in the CPU address space.The driver
>> +  (drivers/mtd/devices/spear_smi.c) probes the attached flashes
>> +  dynamically by sending commands (e.g., RDID) to each bank.
>> +  Flash sub nodes describe the memory range and optional per-flash
>> +  properties.
>> +
>> +allOf:
>> +  - $ref: mtd.yaml#
>> +
>> +properties:
>> +  compatible:
>> +    const: st,spear600-smi
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  "#address-cells":
>> +    const: 1
>> +
>> +  "#size-cells":
>> +    const: 1
>> +
>> +  clock-rate:
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    description: Functional clock rate of the SMI controller in Hz.
>> +
>> +  st,smi-fast-mode:
>> +    type: boolean
>> +    description: Indicates that the attached flash supports fast read mode.
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clock-rate
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    flash at fc000000 {
>> +        compatible = "st,spear600-smi";
>> +        #address-cells = <1>;
>> +        #size-cells = <1>;
>> +        reg = <0xfc000000 0x1000>;
>> +        interrupt-parent = <&vic1>;
>> +        interrupts = <12>;
>> +        clock-rate = <50000000>;  /* 50 MHz */
>> +
>> +        flash at f8000000 {
> This is now a warning in linux-next:
>
> Documentation/devicetree/bindings/mtd/st,spear600-smi.example.dtb:
> flash at fc000000 (st,spear600-smi): Unevaluated properties are not
> allowed ('flash at f8000000' was unexpected)
>         from schema $id: http://devicetree.org/schemas/mtd/st,spear600-smi.yaml
>
> Please send a fix (and test your schemas before sending).


Sure, i will resolve that issue and send a next version.

>
> Rob

-- 
Best Regards,
Akhila.