filogic: add support for Netgear EAX17

Hardware
--------

SOC:   MediaTek MT7981
RAM:   512MB DDR4
FLASH: 128MB SPI-NAND
WIFI:  Mediatek MT7915 (integrated) 2x2 802.11ax 2.4 / 5 GHz
ETH:   Mediatek MT7981 internal 1 GbE PHY
UART:  3V3 115200 8N1 (Pinout silkscreened / Do not connect VCC)

Installation
------------

1. Download the OpenWrt initramfs image. Copy the image to a TFTP server
2. Connect the TFTP server to the EAX17. Conect to the serial console,
   interrupt the autoboot process by pressing '0' when prompted.
3. Download & Boot the OpenWrt initramfs image.

   $ tftpboot openwrt.bin
   $ bootm

4. Wait for OpenWrt to boot. Transfer the sysupgrade image to the device
   using scp and install using sysupgrade.

   $ sysupgrade -n <path-to-sysupgrade.bin>

Signed-off-by: Jascha Sundaresan <[email protected]>
Link: openwrt/openwrt#20354
Signed-off-by: Hauke Mehrtens <[email protected]>

Author: Jascha-Sundaresan

include/image-commands.mk

@@ -430,7 +430,7 @@ define Build/initrd_compression
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),.zstd)
 endef
 
-define Build/fit
+define Build/fit-its
 	$(if $(findstring with-rootfs,$(word 3,$(1))), \
 		$(call locked,dd if=$(IMAGE_ROOTFS) of=$(IMAGE_ROOTFS).pagesync bs=4096 conv=sync, \
 		  gen-cpio$(if $(TARGET_PER_DEVICE_ROOTFS),.$(ROOTFS_ID/$(DEVICE_NAME)))))
@@ -452,12 +452,20 @@ define Build/fit
 		$(if $(DEVICE_DTS_OVERLAY),$(foreach dtso,$(DEVICE_DTS_OVERLAY), -O $(dtso):$(KERNEL_BUILD_DIR)/image-$(dtso).dtbo)) \
 		-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config-1") \
 		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
+endef
+
+define Build/fit-image
 	$(call locked,PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage $(if $(findstring external,$(word 3,$(1))),\
 		-E -B 0x1000 $(if $(findstring static,$(word 3,$(1))),-p 0x1000)) -f $@.its $@.new, \
 	  gen-cpio$(if $(TARGET_PER_DEVICE_ROOTFS),.$(ROOTFS_ID/$(DEVICE_NAME))))
 	@mv $@.new $@
 endef
 
+define Build/fit
+	$(call Build/fit-its,$(1))
+	$(call Build/fit-image,$(1))
+endef
+
 define Build/libdeflate-gzip
 	$(STAGING_DIR_HOST)/bin/libdeflate-gzip -f -12 -c $@ $(1) > $@.new
 	@mv $@.new $@

scripts/gen_netgear_rootfs_node.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Author: Jascha Sundaresan <[email protected]>
+#
+# This helper script generates a top-level 'rootfs' node for inclusion
+# in a Flattened Image Tree (FIT) source (.its) file.  The node includes
+# the size and SHA1 hash of a given root filesystem image and is used by
+# certain Netgear devices which expect this metadata at the top level of
+# the FIT structure.
+#
+# The resulting block is written to standard output and can be appended
+# or inserted into an existing .its file by the OpenWrt build system.
+# Example:
+#     scripts/gen_netgear_rootfs_node.sh build_dir/.../root.squashfs > node.txt
+#
+# See also: scripts/mkits.sh, which generates the main FIT .its source.
+
+ROOTFS_FILE="$1"
+ROOTFS_SIZE=$(stat -c %s "${ROOTFS_FILE}")
+ROOTFS_SHA1=$(
+    sha1sum "${ROOTFS_FILE}" | awk '{ print "<0x" substr($0, 1, 8) \
+                                          " 0x" substr($0, 9, 8) \
+                                          " 0x" substr($0, 17, 8) \
+                                          " 0x" substr($0, 25, 8) \
+                                          " 0x" substr($0, 33, 8) ">" }'
+)
+cat <<EOF | sed 's/^/\t/'
+rootfs {
+	size = <${ROOTFS_SIZE}>;
+
+	hash-1 {
+		value = ${ROOTFS_SHA1};
+		algo = "sha1";
+	};
+};
+
+EOF

target/linux/generic/backport-6.12/010-v6.19-nvmem-layouts-u-boot-env-add-optional-env-size-property.patch

@@ -0,0 +1,62 @@
+From 06e92afca89075628b12c9b4085b4cc7320081ac Mon Sep 17 00:00:00 2001
+From: Jascha Sundaresan <[email protected]>
+Date: Thu, 23 Oct 2025 03:07:41 +0400
+Subject: nvmem: layouts: u-boot-env: add optional "env-size" property
+
+Some devices reserve a larger NVMEM region for the U-Boot environment
+than the actual environment data length used by U-Boot itself. The CRC32
+in the U-Boot header is calculated over the smaller data length, causing
+CRC validation to fail when Linux reads the full partition.
+
+Allow an optional device tree property "env-size" to specify the
+environment data size to use for CRC computation.
+
+v2: add missing $ref line to DT binding
+
+Signed-off-by: Jascha Sundaresan <[email protected]>
+Reviewed-by: Rob Herring (Arm) <[email protected]>
+Signed-off-by: Srinivas Kandagatla <[email protected]>
+---
+ Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml | 7 +++++++
+ drivers/nvmem/layouts/u-boot-env.c                              | 4 +++-
+ 2 files changed, 10 insertions(+), 1 deletion(-)
+
+--- a/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
++++ b/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
+@@ -46,6 +46,12 @@ properties:
+     type: object
+     description: Command to use for automatic booting
+ 
++  env-size:
++    description:
++      Size in bytes of the environment data used by U-Boot for CRC
++      calculation. If omitted, the full NVMEM region size is used.
++    $ref: /schemas/types.yaml#/definitions/uint32
++
+   ethaddr:
+     type: object
+     description: Ethernet interfaces base MAC address.
+@@ -104,6 +110,7 @@ examples:
+ 
+             partition-u-boot-env {
+                 compatible = "brcm,env";
++                env-size = <0x20000>;
+ 
+                 ethaddr {
+                 };
+--- a/drivers/nvmem/layouts/u-boot-env.c
++++ b/drivers/nvmem/layouts/u-boot-env.c
+@@ -99,10 +99,12 @@ int u_boot_env_parse(struct device *dev,
+ 	uint32_t crc32;
+ 	uint32_t calc;
+ 	uint8_t *buf;
++	u32 env_size;
+ 	int bytes;
+ 	int err;
+ 
+-	dev_size = nvmem_dev_size(nvmem);
++	dev_size = device_property_read_u32(dev, "env-size", &env_size) ?
++		nvmem_dev_size(nvmem) : (size_t)env_size;
+ 
+ 	buf = kzalloc(dev_size, GFP_KERNEL);
+ 	if (!buf) {