openwrt/target/linux/ipq806x/patches-5.10/099-2-Documentation-devicetree-mtd-qcom_nandc-document-qco.patch

From 6fb003a7a117f97a35b078ba726c84adeae29c4c Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Wed, 10 Feb 2021 10:54:19 +0100
Subject: [PATCH 2/2] Documentation: devicetree: mtd: qcom_nandc: document
 qcom,boot_layout_size binding

Document new qcom,boot_layout_size binding used to apply special
read/write confituation to boots partitions.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
 Documentation/devicetree/bindings/mtd/qcom_nandc.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
+++ b/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
@@ -52,6 +52,15 @@ Optional properties:
 			be used according to chip requirement and available
 			OOB size.
 
+EBI2 specific properties:
+- nand-is-boot-medium:	nand contains boot partitions and different ecc configuration
+			should be used for these partitions.
+- qcom,boot_pages_size:	should contain the size of the total boot partitions
+			where the boot layout read/write specific configuration
+			should be used. The boot layout is considered from the
+			start of the nand to the value set in this binding.
+			Only used in combination with 'nand-is-boot-medium'.
+
 Each nandcs device node may optionally contain a 'partitions' sub-node, which
 further contains sub-nodes describing the flash partition mapping. See
 partition.txt for more detail.
@@ -80,6 +89,9 @@ nand-controller@1ac00000 {
 		nand-ecc-strength = <4>;
 		nand-bus-width = <8>;
 
+		nand-is-boot-medium;
+		qcom,boot_pages_size: <0x58a0000>;
+
 		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;