[Kindle] Add preliminary support for Kindle Oasis 2 (#3698)

Screen refresh may still be broken.

References #3695.

frontend/device/kindle/device.lua

@@ -242,6 +242,14 @@ local KindleOasis = Kindle:new{
     touch_dev = "/dev/input/by-path/platform-imx-i2c.1-event",
 }
 
+local KindleOasis2 = Kindle:new{
+    model = "KindleOasis2",
+    isTouchDevice = yes,
+    hasFrontlight = yes,
+    display_dpi = 300,
+    touch_dev = "/dev/input/by-path/platform-30a30000.i2c-event",
+}
+
 local KindleBasic2 = Kindle:new{
     model = "KindleBasic2",
     isTouchDevice = yes,
@@ -581,6 +589,7 @@ local kindle_devcode = string.sub(kindle_sn,3,4)
 local kindle_devcode_v2 = string.sub(kindle_sn,4,6)
 
 -- NOTE: Update me when new devices come out :)
+-- Also refer to https://wiki.mobileread.com/wiki/Kindle_Serial_Numbers
 local k2_set = Set { "02", "03" }
 local dx_set = Set { "04", "05" }
 local dxg_set = Set { "09" }
@@ -595,6 +604,7 @@ local kv_set = Set { "13", "54", "2A", "4F", "52", "53" }
 local pw3_set = Set { "0G1", "0G2", "0G4", "0G5", "0G6", "0G7",
                   "0KB", "0KC", "0KD", "0KE", "0KF", "0KG", "0LK", "0LL" }
 local koa_set = Set { "0GC", "0GD", "0GR", "0GS", "0GT", "0GU" }
+local koa2_set = Set { "0P8", "0S1", "0SA" }
 local kt3_set = Set { "0DU", "0K9", "0KA" }
 
 if k2_set[kindle_devcode] then
@@ -621,6 +631,8 @@ elseif pw3_set[kindle_devcode_v2] then
     return KindlePaperWhite3
 elseif koa_set[kindle_devcode_v2] then
     return KindleOasis
+elseif koa2_set[kindle_devcode_v2] then
+    return KindleOasis2
 elseif kt3_set[kindle_devcode_v2] then
     return KindleBasic2
 end

platform/kindle/libkohelper.sh

@@ -69,6 +69,11 @@ case "${kmodel}" in
                     EIPS_X_RES=16
                     EIPS_Y_RES=24
                     ;;
+                "0P8" | "0S1" | "0SA")
+                    # Oasis 2
+                    SCREEN_X_RES=1264
+                    SCREEN_Y_RES=1680
+                    ;;
                 "0DT" | "0K9" | "0KA")
                     # KT3... NOTE: Hopefully matches the KT2...
                     SCREEN_X_RES=608