[PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[Akhila YS]

Convert NXP LPC18xx OTP memory controller binding to YAML format.

Signed-off-by: Akhila YS <akhilayalmati@gmail.com>
---
 .../devicetree/bindings/nvmem/lpc1850-otp.txt      | 20 ---------
 .../devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml | 51 ++++++++++++++++++++++
 2 files changed, 51 insertions(+), 20 deletions(-)

diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
deleted file mode 100644
index 853b6a754644..000000000000
--- a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-* NXP LPC18xx OTP memory
-
-Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices.
-
-Required properties:
-  - compatible: Should be "nxp,lpc1850-otp"
-  - reg: Must contain an entry with the physical base address and length
-    for each entry in reg-names.
-  - address-cells: must be set to 1.
-  - size-cells: must be set to 1.
-
-See nvmem.txt for more information.
-
-Example:
-  otp: otp@40045000 {
-    compatible = "nxp,lpc1850-otp";
-    reg = <0x40045000 0x1000>;
-    #address-cells = <1>;
-    #size-cells = <1>;
-  };
diff --git a/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml b/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
new file mode 100644
index 000000000000..d37e928e7a35
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/nxp,lpc1850-otp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP LPC18xx / LPC43xx One-Time Programmable (OTP) memory
+
+maintainers:
+  - Srinivas Kandagatla <srini@kernel.org>
+
+description:
+  The internal OTP memory in NXP LPC18xx and LPC43xx microcontrollers
+  provides a dedicated non-volatile storage area designed for permanent,
+  one-time configuration and data storage.The OTP controller manages write
+  protection, programming sequencing, and error detection mechanisms to
+  guarantee reliable and safe permanent programming under software control.
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    const: nxp,lpc1850-otp
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    otp@40045000 {
+        compatible = "nxp,lpc1850-otp";
+        reg = <0x40045000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+    };
+...

---
base-commit: cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
change-id: 20260121-lpc1850-otp-eec5d3c3072c

Best regards,
-- 
Akhila YS <akhilayalmati@gmail.com>

Re: [PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[Conor Dooley]

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Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

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Re: [PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[Akhila YS]

On 23-01-2026 22:50, Conor Dooley wrote:
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> pw-bot: not-applicable

This acked tag is not reflected in kernel lore , my patch description
and signature are missing in your reply.


-- 
Best Regards,
Akhila.

Re: [PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[Conor Dooley]

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On Mon, Jan 26, 2026 at 02:54:06PM +0530, Akhila YS wrote:
> 
> On 23-01-2026 22:50, Conor Dooley wrote:
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> > pw-bot: not-applicable
> 
> This acked tag is not reflected in kernel lore , my patch description
> and signature are missing in your reply.

I have no idea what you are talking about, sorry. The ack can be seen on
lore here:
https://lore.kernel.org/all/20260123-childcare-blend-fcfb6b3401b8@spud/

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Re: [PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[Vladimir Zapolskiy]

Hello Akhila.

On 1/23/26 17:19, Akhila YS wrote:
> Convert NXP LPC18xx OTP memory controller binding to YAML format.
> 
> Signed-off-by: Akhila YS <akhilayalmati@gmail.com>
> ---
>   .../devicetree/bindings/nvmem/lpc1850-otp.txt      | 20 ---------
>   .../devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml | 51 ++++++++++++++++++++++
>   2 files changed, 51 insertions(+), 20 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
> deleted file mode 100644
> index 853b6a754644..000000000000
> --- a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
> +++ /dev/null
> @@ -1,20 +0,0 @@
> -* NXP LPC18xx OTP memory
> -
> -Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices.
> -
> -Required properties:
> -  - compatible: Should be "nxp,lpc1850-otp"
> -  - reg: Must contain an entry with the physical base address and length
> -    for each entry in reg-names.
> -  - address-cells: must be set to 1.
> -  - size-cells: must be set to 1.
> -
> -See nvmem.txt for more information.
> -
> -Example:
> -  otp: otp@40045000 {
> -    compatible = "nxp,lpc1850-otp";
> -    reg = <0x40045000 0x1000>;
> -    #address-cells = <1>;
> -    #size-cells = <1>;
> -  };
> diff --git a/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml b/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
> new file mode 100644
> index 000000000000..d37e928e7a35
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/nvmem/nxp,lpc1850-otp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP LPC18xx / LPC43xx One-Time Programmable (OTP) memory
> +
> +maintainers:
> +  - Srinivas Kandagatla <srini@kernel.org>

You may add me as a maintainer, the change is not catched by the "lpc18xx"
file name pattern from a record in the MAINTAINERS file, but essentially
it's an NXP LPC18xx/LPC43xx related change.

> +
> +description:
> +  The internal OTP memory in NXP LPC18xx and LPC43xx microcontrollers
> +  provides a dedicated non-volatile storage area designed for permanent,
> +  one-time configuration and data storage.The OTP controller manages write

Please remove all info after the first sentence.

> +  protection, programming sequencing, and error detection mechanisms to
> +  guarantee reliable and safe permanent programming under software control.

What is the source of the information above? I don't quite understand what
is "error detection mechanisms" here etc. OTP controller functions are
defined in SoC ROM, and it is unrelated to the described OTP memory region.

> +
> +allOf:
> +  - $ref: nvmem.yaml#
> +
> +properties:
> +  compatible:
> +    const: nxp,lpc1850-otp
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 1

This comes from nvmem.yaml

> +
> +required:
> +  - compatible
> +  - reg
> +  - "#address-cells"
> +  - "#size-cells"

Please drop #address-cells/#size-cells from the list of the required
properties.

So far there is no user of this device tree node, and "nvmem-layout"
mechanism may be preferred in future.

> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    otp@40045000 {
> +        compatible = "nxp,lpc1850-otp";
> +        reg = <0x40045000 0x1000>;
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +    };
> +...
> 

-- 
Best wishes,
Vladimir

Re: [PATCH] dt-bindings: nvmem: nxp,lpc1850-otp: convert to DT schema

[Akhila YS]

On 26-01-2026 18:58, Vladimir Zapolskiy wrote:
> Hello Akhila.
>
> On 1/23/26 17:19, Akhila YS wrote:
>> Convert NXP LPC18xx OTP memory controller binding to YAML format.
>>
>> Signed-off-by: Akhila YS <akhilayalmati@gmail.com>
>> ---
>>   .../devicetree/bindings/nvmem/lpc1850-otp.txt      | 20 ---------
>>   .../devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml | 51
>> ++++++++++++++++++++++
>>   2 files changed, 51 insertions(+), 20 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
>> b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
>> deleted file mode 100644
>> index 853b6a754644..000000000000
>> --- a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt
>> +++ /dev/null
>> @@ -1,20 +0,0 @@
>> -* NXP LPC18xx OTP memory
>> -
>> -Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx
>> devices.
>> -
>> -Required properties:
>> -  - compatible: Should be "nxp,lpc1850-otp"
>> -  - reg: Must contain an entry with the physical base address and
>> length
>> -    for each entry in reg-names.
>> -  - address-cells: must be set to 1.
>> -  - size-cells: must be set to 1.
>> -
>> -See nvmem.txt for more information.
>> -
>> -Example:
>> -  otp: otp@40045000 {
>> -    compatible = "nxp,lpc1850-otp";
>> -    reg = <0x40045000 0x1000>;
>> -    #address-cells = <1>;
>> -    #size-cells = <1>;
>> -  };
>> diff --git
>> a/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
>> b/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
>> new file mode 100644
>> index 000000000000..d37e928e7a35
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/nvmem/nxp,lpc1850-otp.yaml
>> @@ -0,0 +1,51 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/nvmem/nxp,lpc1850-otp.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: NXP LPC18xx / LPC43xx One-Time Programmable (OTP) memory
>> +
>> +maintainers:
>> +  - Srinivas Kandagatla <srini@kernel.org>
>
> You may add me as a maintainer, the change is not catched by the
> "lpc18xx"
> file name pattern from a record in the MAINTAINERS file, but essentially
> it's an NXP LPC18xx/LPC43xx related change. 
>

Sure, I will add you as a maintainer.


>> +
>> +description:
>> +  The internal OTP memory in NXP LPC18xx and LPC43xx microcontrollers
>> +  provides a dedicated non-volatile storage area designed for
>> permanent,
>> +  one-time configuration and data storage.The OTP controller manages
>> write
>
> Please remove all info after the first sentence.
>
>> +  protection, programming sequencing, and error detection mechanisms to
>> +  guarantee reliable and safe permanent programming under software
>> control.
>
> What is the source of the information above? I don't quite understand
> what
> is "error detection mechanisms" here etc. OTP controller functions are
> defined in SoC ROM, and it is unrelated to the described OTP memory
> region. 


Ok.


>
>> +
>> +allOf:
>> +  - $ref: nvmem.yaml#
>> +
>> +properties:
>> +  compatible:
>> +    const: nxp,lpc1850-otp
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  "#address-cells":
>> +    const: 1
>> +
>> +  "#size-cells":
>> +    const: 1
>
> This comes from nvmem.yaml 


Yes, I will remove above two properties.


>
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - "#address-cells"
>> +  - "#size-cells"
>
> Please drop #address-cells/#size-cells from the list of the required
> properties.
>
> So far there is no user of this device tree node, and "nvmem-layout"
> mechanism may be preferred in future. 


Ok.


>
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    otp@40045000 {
>> +        compatible = "nxp,lpc1850-otp";
>> +        reg = <0x40045000 0x1000>;
>> +        #address-cells = <1>;
>> +        #size-cells = <1>;
>> +    };
>> +...
>>
>
-- 
Best Regards,
Akhila.