linux-kernel - [PATCH v2 1/2] dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code

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Message-ID: <20240408085931.456337-2-avkrasnov@salutedevices.com>
Date: Mon, 8 Apr 2024 11:59:30 +0300
From: Arseniy Krasnov <avkrasnov@...utedevices.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>, Richard Weinberger
	<richard@....at>, Vignesh Raghavendra <vigneshr@...com>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Neil
 Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>,
	Jerome Brunet <jbrunet@...libre.com>, Martin Blumenstingl
	<martin.blumenstingl@...glemail.com>
CC: <linux-mtd@...ts.infradead.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-amlogic@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <oxffffaa@...il.com>,
	<kernel@...rdevices.ru>, Arseniy Krasnov <avkrasnov@...utedevices.com>
Subject: [PATCH v2 1/2] dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code

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@...utedevices.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..80ba5003ca70 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-page-last:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          The NFC driver needs this information to select ECC
+          algorithms supported by the boot ROM.
+
+      amlogic,boot-page-step:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          The NFC driver needs this information to select ECC
+          algorithms supported by the boot ROM (in pages).
+
     unevaluatedProperties: false
 
     dependencies:
       nand-ecc-strength: [nand-ecc-step-size]
       nand-ecc-step-size: [nand-ecc-strength]
+      amlogic,boot-page-last: [nand-is-boot-medium, amlogic,boot-page-step]
+      amlogic,boot-page-step: [nand-is-boot-medium, amlogic,boot-page-last]
 
 
 required:
-- 
2.35.0