[OpenWrt-Devel] [PATCH] ath79: enable all space on Netgear ar9344-based WNDR routers

[Piotr Dymacz]

Hi Michal,

On 12.11.2019 14:02, Michal Cieslakiewicz wrote:
> Netgear WNDR routers (AR9344 models) like WNDR4300 have 128 MiB of flash
> memory but only first 32 MiB are used now - both by vendor's firmware and
> OpenWrt. This patch concatenates two regions of flash memory: ubi part
> of firmware partition and reserved (unused) space beyond 'caldata_backup'
> while preserving ART backup. No data is wiped or moved away.
> This increases area for OS ubi volumes from 23 to 119 Megabytes.

Is revert to vendor firmware still possible with this change, e.g. using 
Netgear TFTP recovery mode?

-- 
Cheers,
Piotr

> 
> Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz at wp.pl>
> ---
>   .../linux/ath79/dts/ar9344_netgear_wndr.dtsi  | 25 +++++++++++++++----
>   1 file changed, 20 insertions(+), 5 deletions(-)
> 
> diff --git a/target/linux/ath79/dts/ar9344_netgear_wndr.dtsi b/target/linux/ath79/dts/ar9344_netgear_wndr.dtsi
> index 16a4e3f6e8..d5a699e774 100644
> --- a/target/linux/ath79/dts/ar9344_netgear_wndr.dtsi
> +++ b/target/linux/ath79/dts/ar9344_netgear_wndr.dtsi
> @@ -97,6 +97,22 @@
>   			linux,default-trigger = "usbport";
>   		};
>   	};
> +
> +	ubi-concat {
> +		compatible = "mtd-concat";
> +		devices = <&ubipart0 &ubipart1>;
> +
> +		partitions {
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +
> +			ubi at 8c0000 {
> +				label = "ubi";
> +				reg = <0x0 0x7700000>;
> +			};
> +		};
> +	};
>   };
>   
>   &pinmux {
> @@ -155,8 +171,8 @@
>   			reg = <0x6c0000 0x200000>;
>   		};
>   
> -		ubi at 8c0000 {
> -			label = "ubi";
> +		ubipart0: partition at 8c0000 {
> +			label = "ubipart0";
>   			reg = <0x8c0000 0x1700000>;
>   		};
>   
> @@ -172,10 +188,9 @@
>   			read-only;
>   		};
>   
> -		partition at 2000000 {
> -			label = "reserved";
> +		ubipart1: partition at 2000000 {
> +			label = "ubipart1";
>   			reg = <0x2000000 0x6000000>;
> -			read-only;
>   		};
>   	};
>   };
> 


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