[PATCH v3 2/2] ath79: airtight c-75: use second flash chip

[Tomasz Maciej Nowak]

The flash capacity is divided in two flash chips and currently only
first is used. Increase available space for OpenWrt by additional 16 MiB
using mtd-concat driver. Because U-Boot might not be able to load kernel
image spanned through two flash chips, the size of kernel is limited
to space available on first first chip.

Cc: Vladimir Georgievsky <vladimir.georgiev...@yahoo.com>
Signed-off-by: Tomasz Maciej Nowak <tmn...@gmail.com>
---
v2->v3

- add labels for concatenated partitions
- change node name for concatenated mtd

 .../linux/ath79/dts/qca9550_airtight_c-75.dts | 26 +++++++++++++++----
 target/linux/ath79/image/generic.mk           |  3 ++-
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/target/linux/ath79/dts/qca9550_airtight_c-75.dts 
b/target/linux/ath79/dts/qca9550_airtight_c-75.dts
index 566aa6aef6eb..1bdbc8615612 100644
--- a/target/linux/ath79/dts/qca9550_airtight_c-75.dts
+++ b/target/linux/ath79/dts/qca9550_airtight_c-75.dts
@@ -41,6 +41,23 @@
                        linux,default-trigger = "phy1tpt";
                };
        };
+
+       virtual_flash {
+               compatible = "mtd-concat";
+               devices = <&concat0 &concat1>;
+
+               partitions {
+                       compatible = "fixed-partitions";
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+
+                       partition@0 {
+                               label = "firmware";
+                               reg = <0x0 0x1f90000>;
+                               compatible = "denx,uimage";
+                       };
+               };
+       };
 };
 
 &eth0 {
@@ -118,10 +135,9 @@
                                read-only;
                        };
 
-                       partition@60000 {
-                               label = "firmware";
+                       concat0: partition@60000 {
+                               label = "reserved1";
                                reg = <0x060000 0xf90000>;
-                               compatible = "denx,uimage";
                        };
 
                        art: partition@ff0000 {
@@ -142,8 +158,8 @@
                        #address-cells = <1>;
                        #size-cells = <1>;
 
-                       partition@0 {
-                               label = "opt";
+                       concat1: partition@0 {
+                               label = "reserved2";
                                reg = <0x0 0x1000000>;
                        };
                };
diff --git a/target/linux/ath79/image/generic.mk 
b/target/linux/ath79/image/generic.mk
index baaea00c30b9..4d181245a6ef 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -246,7 +246,8 @@ define Device/airtight_c-75
   DEVICE_ALT1_VENDOR := WatchGuard
   DEVICE_ALT1_MODEL := AP320
   DEVICE_PACKAGES := ath10k-firmware-qca988x-ct kmod-ath10k-ct kmod-usb2
-  IMAGE_SIZE := 15936k
+  IMAGE_SIZE := 32320k
+  KERNEL_SIZE := 15936k
 endef
 TARGET_DEVICES += airtight_c-75
 
-- 
2.29.2


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