Add kindlehf target (#11986)

for kindles after fw 5.16.3

* Add kindlehf mk file
* Update kodev to support kindlehf
* Update OTAManager logic to support kindlehf

frontend/ui/otamanager.lua

@@ -49,6 +49,12 @@ local ota_channels = {
     nightly = _("Development"),
 }
 
+-- Try to detect Kindle running hardfp firmware
+function OTAManager:_isKindleHardFP()
+    local util = require("util")
+    return util.pathExists("/lib/ld-linux-armhf.so.3")
+end
+
 -- Try to detect WARIO+ Kindle boards (i.MX6 & i.MX7)
 function OTAManager:_isKindleWarioOrMore()
     local cpu_hw = nil
@@ -93,7 +99,9 @@ function OTAManager:getOTAModel()
         return "cervantes"
     elseif Device:isKindle() then
         if Device:isTouchDevice() or Device.model == "Kindle4" then
-            if self:_isKindleWarioOrMore() then
+            if self:_isKindleHardFP() then
+                return "kindlehf"
+            elseif self:_isKindleWarioOrMore() then
                 return "kindlepw2"
             else
                 return "kindle"

kodev

@@ -144,6 +144,7 @@ function kodev-fetch-thirdparty() {
 
 SUPPORTED_TARGETS="
     kindle          Compatible with all Kindle models >= Kindle4
+    kindlehf        Compatible with all Kindles with FW >= 5.16.3
     kindlepw2       With compiler optimizations for Kindle models >= Paperwhite 2
     kindle-legacy   Needed only for Kindle2/3/DXG
     kobo
@@ -228,6 +229,10 @@ ${SUPPORTED_TARGETS}"
             make TARGET=kindle
             assert_ret_zero $?
             ;;
+        kindlehf)
+            make TARGET=kindlehf
+            assert_ret_zero $?
+            ;;
         kindlepw2)
             make TARGET=kindlepw2
             assert_ret_zero $?
@@ -346,6 +351,9 @@ ${SUPPORTED_TARGETS}"
         kindle)
             make TARGET=kindle clean
             ;;
+        kindlehf)
+            make TARGET=kindlehf clean
+            ;;
         kindlepw2)
             make TARGET=kindlepw2 clean
             ;;
@@ -475,6 +483,10 @@ ${SUPPORTED_RELEASE_TARGETS}"
             kodev-build kindle
             make TARGET=kindle update
             ;;
+        kindlehf)
+            kodev-build kindlehf
+            make TARGET=kindlehf update
+            ;;
         kindlepw2)
             kodev-build kindlepw2
             make TARGET=kindlepw2 update

make/kindlehf.mk

@@ -0,0 +1 @@
+include make/kindle.mk