This types of NAND partitions appear in OpenWrt and
U-Boot.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Drop reference from partitions.yaml again
- Drop select: false
- Use unevaluatedProperties
ChangeLog v1->v2:
- Fix up the binding to be childless
---
 .../devicetree/bindings/mtd/partitions/seama.yaml  | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/partitions/seama.yaml b/Documentation/devicetree/bindings/mtd/partitions/seama.yaml
new file mode 100644
index 000000000000..5105d1a6a44c
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/seama.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/seama.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Seattle Image Partitions
+
+description: The SEAttle iMAge (SEAMA) partition is a type of partition
+  used for NAND flash devices. This type of flash image is found in some
+  D-Link routers such as DIR-645, DIR-842, DIR-859, DIR-860L, DIR-885L,
+  DIR890L and DCH-M225, as well as in WD and NEC routers on the ath79
+  (MIPS), Broadcom BCM53xx, and RAMIPS platforms. This partition type
+  does not have children defined in the device tree, they need to be
+  detected by software.
+
+allOf:
+  - $ref: partition.yaml#
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+properties:
+  compatible:
+    const: seama
+
+  '#address-cells': false
+
+  '#size-cells': false
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            compatible = "seama";
+            reg = <0x0 0x800000>;
+            label = "firmware";
+        };
+    };

-- 
2.34.1

On Fri, Jul 07, 2023 at 07:42:40PM +0200, Linus Walleij wrote:
> This types of NAND partitions appear in OpenWrt and
> U-Boot.
> 
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v2->v3:
> - Drop reference from partitions.yaml again
> - Drop select: false
> - Use unevaluatedProperties
> ChangeLog v1->v2:
> - Fix up the binding to be childless
> ---
>  .../devicetree/bindings/mtd/partitions/seama.yaml  | 48 ++++++++++++++++++++++
>  1 file changed, 48 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/partitions/seama.yaml b/Documentation/devicetree/bindings/mtd/partitions/seama.yaml
> new file mode 100644
> index 000000000000..5105d1a6a44c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/partitions/seama.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/partitions/seama.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Seattle Image Partitions
> +
> +description: The SEAttle iMAge (SEAMA) partition is a type of partition
> +  used for NAND flash devices. This type of flash image is found in some
> +  D-Link routers such as DIR-645, DIR-842, DIR-859, DIR-860L, DIR-885L,
> +  DIR890L and DCH-M225, as well as in WD and NEC routers on the ath79
> +  (MIPS), Broadcom BCM53xx, and RAMIPS platforms. This partition type
> +  does not have children defined in the device tree, they need to be
> +  detected by software.
> +
> +allOf:
> +  - $ref: partition.yaml#
> +
> +maintainers:
> +  - Linus Walleij <linus.walleij@linaro.org>
> +
> +properties:
> +  compatible:
> +    const: seama
> +
> +  '#address-cells': false
> +
> +  '#size-cells': false

You don't need these 2. You'd only need them if partition.yaml defined 
them and you wanted to disallow them.

Rob