[PATCH v5 1/2] dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code

Arseniy Krasnov
2024-04-16T09:02:38Z

Boot ROM code on Meson requires that some pages on NAND must be written
in special mode: "short" ECC mode where each block is 384 bytes and
scrambling mode is on. Such pages located with the specified interval
within specified offset. Both interval and offset are located in the
device tree and used by driver if 'nand-is-boot-medium' is set for
NAND chip.

Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com>
---
.../bindings/mtd/amlogic,meson-nand.yaml | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
index 57b6957c8415..67b2f7c1259c 100644
--- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
+++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
@@ -64,11 +64,25 @@ patternProperties:
items:
maximum: 0

+ amlogic,boot-pages:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Number of pages starting from 0, where special ECC
+ algorithm will be used by the driver.
+
+ amlogic,boot-page-step:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Interval between pages, read/written by the driver with
+ special ECC algorithm.
+
unevaluatedProperties: false

dependencies:
nand-ecc-strength: [nand-ecc-step-size]
nand-ecc-step-size: [nand-ecc-strength]
+ amlogic,boot-pages: [nand-is-boot-medium, "amlogic,boot-page-step"]
+ amlogic,boot-page-step: [nand-is-boot-medium, "amlogic,boot-pages"]

required:
--
2.35.0