[openwrt/openwrt] ath79: create APBoot-compatible image for Aruba AP-175

[LEDE Commits]

blocktrron pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/90ad13c76360e5c0ff45db2fd88ffb2595afe451

commit 90ad13c76360e5c0ff45db2fd88ffb2595afe451
Author: Martin Kennedy <hurricos at gmail.com>
AuthorDate: Thu Apr 20 17:58:21 2023 -0400

    ath79: create APBoot-compatible image for Aruba AP-175
    
    As was done in commit e11d00d44c66 ("ath79: create Aruba AP-105 APBoot
    compatible image"), alter the Aruba AP-175 image generation process so
    OpenWrt can be loaded with the vendor Aruba APBoot. Since the
    remainder of the explanation and installation process is identical,
    continuing the quote from that commit:
    
    This works by prepending the OpenWrt LZMA loader to the uImage and
    jumping directly to the loader. Aruba does not offer bootm on these
    boards.
    
    This approach keeps compatibility to devices which had their U-Boot
    replaced. Both bootloaders can boot the same image.
    
    With this patch, new installations do not require replacing the
    bootloader and can be performed from the serial console without
    opening the case.
    
    Installation
    ------------
    
    1. Attach to the serial console of the AP-175.
       Interrupt autoboot and change the U-Boot env.
    
       $ setenv apb_rb_openwrt "setenv ipaddr 192.168.1.1;
         setenv serverip 192.168.1.66;
         netget 0x84000000 ap175.bin; go 0x84000040"
       $ setenv apb_fb_openwrt "cp.b 0xbf040000 0x84000000 0x10000;
         go 0x84000040"
       $ setenv bootcmd "run apb_fb_openwrt"
       $ saveenv
    
    2. Load the OpenWrt initramfs image on the device using TFTP.
       Place the initramfs image as "ap175.bin" in the TFTP server
       root directory, connect it to the AP and make the server reachable
       at 192.168.1.66/24.
    
       $ run apb_rb_openwrt
    
    3. Once OpenWrt booted, transfer the sysupgrade image to the device
       using scp and use sysupgrade to install the firmware.
    
    Signed-off-by: Martin Kennedy <hurricos at gmail.com>
---
 target/linux/ath79/image/generic.mk | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index ecc46bc6b1..fc9ffa6de9 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -419,6 +419,12 @@ define Device/aruba_ap-175
   DEVICE_MODEL := AP-175
   IMAGE_SIZE := 16000k
   DEVICE_PACKAGES := kmod-gpio-pca953x kmod-hwmon-lm75 kmod-i2c-gpio kmod-rtc-ds1374
+  LOADER_TYPE := bin
+  LOADER_FLASH_OFFS := 0x42000
+  COMPILE := loader-$(1).bin
+  COMPILE/loader-$(1).bin := loader-okli-compile
+  KERNEL := kernel-bin | append-dtb | lzma | uImage lzma -M 0x4f4b4c49 | loader-okli $(1) 8128 | uImage none
+  KERNEL_INITRAMFS := kernel-bin | append-dtb | lzma | loader-kernel | uImage none
 endef
 TARGET_DEVICES += aruba_ap-175