On 26-01-2026 18:58, Vladimir Zapolskiy wrote:

Hello Akhila.

On 1/23/26 17:19, Akhila YS wrote:

quoted

Convert NXP LPC18xx OTP memory controller binding to YAML format.

Signed-off-by: Akhila YS <redacted>
---
  .../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.

quoted

+
+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.

quoted

+  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.

quoted

+
+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.

quoted

+
+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.

quoted

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

-- 
Best Regards,
Akhila.