[PATCH 0/3] Add i.MX94 OCOTP support

[PATCH 0/3] Add i.MX94 OCOTP support

[Alice Guo (OSS)]

This patch series adds support for the OCOTP controller on the i.MX94
SoC. The OCOTP controller provides access to eFuse regions.

Tested on an i.MX943 EVK board with successful NVMEM read access via
sysfs.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
---
Alice Guo (3):
      dt-bindings: nvmem: imx-ocotp: Add binding for i.MX94
      nvmem: imx-ocotp-ele: Add support for i.MX94 OCOTP
      arm64: dts: imx94: Add OCOTP node

 .../devicetree/bindings/nvmem/imx-ocotp.yaml         |  4 +++-
 arch/arm64/boot/dts/freescale/imx94.dtsi             |  7 +++++++
 drivers/nvmem/imx-ocotp-ele.c                        | 20 ++++++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)
---
base-commit: cec1e6e5d1ab33403b809f79cd20d6aff124ccfe
change-id: 20250924-imx943-b27ad75d14fa

Best regards,
-- 
Alice Guo <alice.guo@oss.nxp.com>

[PATCH v1 1/3] dt-bindings: nvmem: imx-ocotp: Add binding for i.MX94

[Alice Guo (OSS)]

From: Alice Guo <alice.guo@nxp.com>

Update the imx-ocotp device tree binding documentation to include
support for the i.MX94 SoC.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
---
 Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml b/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
index b2cb76cf9053..a8076d0e2737 100644
--- a/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
@@ -14,7 +14,8 @@ maintainers:
 description: |
   This binding represents the on-chip eFuse OTP controller found on
   i.MX6Q/D, i.MX6DL/S, i.MX6SL, i.MX6SX, i.MX6UL, i.MX6ULL/ULZ, i.MX6SLL,
-  i.MX7D/S, i.MX7ULP, i.MX8MQ, i.MX8MM, i.MX8MN i.MX8MP and i.MX93/5 SoCs.
+  i.MX7D/S, i.MX7ULP, i.MX8MQ, i.MX8MM, i.MX8MN i.MX8MP, i.MX93, i.MX94,
+  and i.MX95.
 
 allOf:
   - $ref: nvmem.yaml#
@@ -36,6 +37,7 @@ properties:
               - fsl,imx8mq-ocotp
               - fsl,imx8mm-ocotp
               - fsl,imx93-ocotp
+              - fsl,imx94-ocotp
               - fsl,imx95-ocotp
           - const: syscon
       - items:

-- 
2.43.0

[PATCH v1 2/3] nvmem: imx-ocotp-ele: Add support for i.MX94 OCOTP

[Alice Guo (OSS)]

From: Alice Guo <alice.guo@nxp.com>

Add OCOTP device type data for i.MX94 SoC, including register offset,
total size, and fuse bank layout. This enables NVMEM access to the
i.MX94's eFuse regions.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/nvmem/imx-ocotp-ele.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/nvmem/imx-ocotp-ele.c b/drivers/nvmem/imx-ocotp-ele.c
index 7807ec0e2d18..7cf7e809a8f5 100644
--- a/drivers/nvmem/imx-ocotp-ele.c
+++ b/drivers/nvmem/imx-ocotp-ele.c
@@ -186,6 +186,25 @@ static const struct ocotp_devtype_data imx93_ocotp_data = {
 	},
 };
 
+static const struct ocotp_devtype_data imx94_ocotp_data = {
+	.reg_off = 0x8000,
+	.reg_read = imx_ocotp_reg_read,
+	.size = 3296, /* 103 Banks */
+	.num_entry = 10,
+	.entry = {
+		{ 0, 1, FUSE_FSB | FUSE_ECC },
+		{ 7, 1, FUSE_FSB | FUSE_ECC },
+		{ 9, 3, FUSE_FSB | FUSE_ECC },
+		{ 12, 24, FUSE_FSB },
+		{ 36, 2, FUSE_FSB  | FUSE_ECC },
+		{ 38, 14, FUSE_FSB },
+		{ 59, 1, FUSE_ELE },
+		{ 525, 2, FUSE_FSB | FUSE_ECC },
+		{ 528, 7, FUSE_FSB },
+		{ 536, 280, FUSE_FSB },
+	},
+};
+
 static const struct ocotp_devtype_data imx95_ocotp_data = {
 	.reg_off = 0x8000,
 	.reg_read = imx_ocotp_reg_read,
@@ -209,6 +228,7 @@ static const struct ocotp_devtype_data imx95_ocotp_data = {
 
 static const struct of_device_id imx_ele_ocotp_dt_ids[] = {
 	{ .compatible = "fsl,imx93-ocotp", .data = &imx93_ocotp_data, },
+	{ .compatible = "fsl,imx94-ocotp", .data = &imx94_ocotp_data, },
 	{ .compatible = "fsl,imx95-ocotp", .data = &imx95_ocotp_data, },
 	{},
 };

-- 
2.43.0

[PATCH v1 3/3] arm64: dts: imx94: Add OCOTP node

[Alice Guo (OSS)]

From: Alice Guo <alice.guo@nxp.com>

Add the OCOTP controller node to the i.MX94 device tree. This enables
support for accessing eFuse regions on i.MX94 SoCs via the imx-ocotp
driver.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx94.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx94.dtsi b/arch/arm64/boot/dts/freescale/imx94.dtsi
index 44dee2cbd42d..1f1148405193 100644
--- a/arch/arm64/boot/dts/freescale/imx94.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx94.dtsi
@@ -1171,6 +1171,13 @@ a55_irqsteer: interrupt-controller@446a0000 {
 			};
 		};
 
+		ocotp: efuse@47510000 {
+			compatible = "fsl,imx94-ocotp";
+			reg = <0x0 0x47510000 0x0 0x10000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+		};
+
 		aips4: bus@49000000 {
 			compatible = "fsl,aips-bus", "simple-bus";
 			reg = <0x0 0x49000000 0x0 0x800000>;

-- 
2.43.0

Re: [PATCH v1 1/3] dt-bindings: nvmem: imx-ocotp: Add binding for i.MX94

[Frank Li]

On Wed, Sep 24, 2025 at 06:06:23PM +0800, Alice Guo (OSS) wrote:
> From: Alice Guo <alice.guo@nxp.com>

Subject needn't "binding" again.

dt-bindings: nvmem: imx-ocotp: Add compatible string fsl,imx94-ocotp

or Add i.MX94 support.

Frank

>
> Update the imx-ocotp device tree binding documentation to include
> support for the i.MX94 SoC.
>
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> ---
>  Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml b/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
> index b2cb76cf9053..a8076d0e2737 100644
> --- a/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
> +++ b/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
> @@ -14,7 +14,8 @@ maintainers:
>  description: |
>    This binding represents the on-chip eFuse OTP controller found on
>    i.MX6Q/D, i.MX6DL/S, i.MX6SL, i.MX6SX, i.MX6UL, i.MX6ULL/ULZ, i.MX6SLL,
> -  i.MX7D/S, i.MX7ULP, i.MX8MQ, i.MX8MM, i.MX8MN i.MX8MP and i.MX93/5 SoCs.
> +  i.MX7D/S, i.MX7ULP, i.MX8MQ, i.MX8MM, i.MX8MN i.MX8MP, i.MX93, i.MX94,
> +  and i.MX95.
>
>  allOf:
>    - $ref: nvmem.yaml#
> @@ -36,6 +37,7 @@ properties:
>                - fsl,imx8mq-ocotp
>                - fsl,imx8mm-ocotp
>                - fsl,imx93-ocotp
> +              - fsl,imx94-ocotp
>                - fsl,imx95-ocotp
>            - const: syscon
>        - items:
>
> --
> 2.43.0
>

Re: [PATCH v1 2/3] nvmem: imx-ocotp-ele: Add support for i.MX94 OCOTP

[Frank Li]

On Wed, Sep 24, 2025 at 06:06:24PM +0800, Alice Guo (OSS) wrote:
> From: Alice Guo <alice.guo@nxp.com>
>
> Add OCOTP device type data for i.MX94 SoC, including register offset,
> total size, and fuse bank layout. This enables NVMEM access to the
> i.MX94's eFuse regions.
>
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> Reviewed-by: Peng Fan <peng.fan@nxp.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  drivers/nvmem/imx-ocotp-ele.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/drivers/nvmem/imx-ocotp-ele.c b/drivers/nvmem/imx-ocotp-ele.c
> index 7807ec0e2d18..7cf7e809a8f5 100644
> --- a/drivers/nvmem/imx-ocotp-ele.c
> +++ b/drivers/nvmem/imx-ocotp-ele.c
> @@ -186,6 +186,25 @@ static const struct ocotp_devtype_data imx93_ocotp_data = {
>  	},
>  };
>
> +static const struct ocotp_devtype_data imx94_ocotp_data = {
> +	.reg_off = 0x8000,
> +	.reg_read = imx_ocotp_reg_read,
> +	.size = 3296, /* 103 Banks */
> +	.num_entry = 10,
> +	.entry = {
> +		{ 0, 1, FUSE_FSB | FUSE_ECC },
> +		{ 7, 1, FUSE_FSB | FUSE_ECC },
> +		{ 9, 3, FUSE_FSB | FUSE_ECC },
> +		{ 12, 24, FUSE_FSB },
> +		{ 36, 2, FUSE_FSB  | FUSE_ECC },
> +		{ 38, 14, FUSE_FSB },
> +		{ 59, 1, FUSE_ELE },
> +		{ 525, 2, FUSE_FSB | FUSE_ECC },
> +		{ 528, 7, FUSE_FSB },
> +		{ 536, 280, FUSE_FSB },
> +	},
> +};
> +
>  static const struct ocotp_devtype_data imx95_ocotp_data = {
>  	.reg_off = 0x8000,
>  	.reg_read = imx_ocotp_reg_read,
> @@ -209,6 +228,7 @@ static const struct ocotp_devtype_data imx95_ocotp_data = {
>
>  static const struct of_device_id imx_ele_ocotp_dt_ids[] = {
>  	{ .compatible = "fsl,imx93-ocotp", .data = &imx93_ocotp_data, },
> +	{ .compatible = "fsl,imx94-ocotp", .data = &imx94_ocotp_data, },
>  	{ .compatible = "fsl,imx95-ocotp", .data = &imx95_ocotp_data, },
>  	{},
>  };
>
> --
> 2.43.0
>

Re: [PATCH v1 3/3] arm64: dts: imx94: Add OCOTP node

[Frank Li]

On Wed, Sep 24, 2025 at 06:06:25PM +0800, Alice Guo (OSS) wrote:
> From: Alice Guo <alice.guo@nxp.com>
>
> Add the OCOTP controller node to the i.MX94 device tree. This enables
> support for accessing eFuse regions on i.MX94 SoCs via the imx-ocotp
> driver.
>
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  arch/arm64/boot/dts/freescale/imx94.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx94.dtsi b/arch/arm64/boot/dts/freescale/imx94.dtsi
> index 44dee2cbd42d..1f1148405193 100644
> --- a/arch/arm64/boot/dts/freescale/imx94.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx94.dtsi
> @@ -1171,6 +1171,13 @@ a55_irqsteer: interrupt-controller@446a0000 {
>  			};
>  		};
>
> +		ocotp: efuse@47510000 {
> +			compatible = "fsl,imx94-ocotp";
> +			reg = <0x0 0x47510000 0x0 0x10000>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +		};
> +
>  		aips4: bus@49000000 {
>  			compatible = "fsl,aips-bus", "simple-bus";
>  			reg = <0x0 0x49000000 0x0 0x800000>;
>
> --
> 2.43.0
>

Re: [PATCH v1 1/3] dt-bindings: nvmem: imx-ocotp: Add binding for i.MX94

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 52 bytes --]

Acked-by: Conor Dooley <conor.dooley@microchip.com>

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH 0/3] Add i.MX94 OCOTP support

[Rob Herring (Arm)]

On Wed, 24 Sep 2025 18:06:22 +0800, Alice Guo (OSS) wrote:
> This patch series adds support for the OCOTP controller on the i.MX94
> SoC. The OCOTP controller provides access to eFuse regions.
> 
> Tested on an i.MX943 EVK board with successful NVMEM read access via
> sysfs.
> 
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> ---
> Alice Guo (3):
>       dt-bindings: nvmem: imx-ocotp: Add binding for i.MX94
>       nvmem: imx-ocotp-ele: Add support for i.MX94 OCOTP
>       arm64: dts: imx94: Add OCOTP node
> 
>  .../devicetree/bindings/nvmem/imx-ocotp.yaml         |  4 +++-
>  arch/arm64/boot/dts/freescale/imx94.dtsi             |  7 +++++++
>  drivers/nvmem/imx-ocotp-ele.c                        | 20 ++++++++++++++++++++
>  3 files changed, 30 insertions(+), 1 deletion(-)
> ---
> base-commit: cec1e6e5d1ab33403b809f79cd20d6aff124ccfe
> change-id: 20250924-imx943-b27ad75d14fa
> 
> Best regards,
> --
> Alice Guo <alice.guo@oss.nxp.com>
> 
> 
> 


My bot found new DTB warnings on the .dts files added or changed in this
series.

Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
are fixed by another series. Ultimately, it is up to the platform
maintainer whether these warnings are acceptable or not. No need to reply
unless the platform maintainer has comments.

If you already ran DT checks and didn't see these error(s), then
make sure dt-schema is up to date:

  pip3 install dtschema --upgrade


This patch series was applied (using b4) to base:
 Base: using specified base-commit cec1e6e5d1ab33403b809f79cd20d6aff124ccfe

If this is not the correct base, please add 'base-commit' tag
(or use b4 which does this automatically)

New warnings running 'make CHECK_DTBS=y for arch/arm64/boot/dts/freescale/' for 20250924-imx943-v1-0-0d32d7852ecb@oss.nxp.com:

arch/arm64/boot/dts/freescale/imx943-evk.dtb: efuse@47510000 (fsl,imx94-ocotp): compatible: 'oneOf' conditional failed, one must be fixed:
	['fsl,imx94-ocotp'] is too short
	'fsl,imx94-ocotp' is not one of ['fsl,imx8mn-ocotp', 'fsl,imx8mp-ocotp']
	from schema $id: http://devicetree.org/schemas/nvmem/imx-ocotp.yaml#
arch/arm64/boot/dts/freescale/imx943-evk.dtb: efuse@47510000 (fsl,imx94-ocotp): Unevaluated properties are not allowed ('compatible' was unexpected)
	from schema $id: http://devicetree.org/schemas/nvmem/imx-ocotp.yaml#