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Message-ID: <e64d76cc-90bb-5b54-04de-fde21542e4fe@gmail.com>
Date:   Mon, 26 Oct 2020 06:30:53 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vivek Unune <npcomplete13@...il.com>
Cc:     devicetree@...r.kernel.org, Hauke Mehrtens <hauke@...ke-m.de>,
        Rafał Miłecki <zajec5@...il.com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: dts: BCM5301X: Linksys EA9500 add fixed partitions



On 10/26/2020 6:13 AM, Vivek Unune wrote:
> This router has dual paritions to store trx firmware image and
> dual partitions for nvram. The second one in each of these cases acts
> as a backup store.
> 
> When tested with OpenWrt, the default partition parser causes two issues:
> 
> 1. It labels both nvram partitions as nvram. In factory, second one is
> labeled devinfo.
> 2. It parses second trx image and tries to create second 'linux' partition
> and fails with - cannot create duplicate 'linux' partition. I've set this
> partition to read-only for now
> 
> The following patch works around both of these issues.
> 
> Signed-off-by: Vivek Unune <npcomplete13@...il.com>
> ---
>   .../boot/dts/bcm47094-linksys-panamera.dts    | 41 +++++++++++++++++++
>   1 file changed, 41 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/bcm47094-linksys-panamera.dts b/arch/arm/boot/dts/bcm47094-linksys-panamera.dts
> index 5d5930edfb9d..13da16c5de68 100644
> --- a/arch/arm/boot/dts/bcm47094-linksys-panamera.dts
> +++ b/arch/arm/boot/dts/bcm47094-linksys-panamera.dts
> @@ -292,3 +292,44 @@ fixed-link {
>   &usb3_phy {
>   	status = "okay";
>   };
> +
> +&nandcs {
> +	partitions {
> +		compatible = "fixed-partitions";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +
> +		partition@0 {
> +			label = "boot";
> +			reg = <0x0000000 0x0080000>;
> +			read-only;
> +		};
> +
> +		partition@...00 {
> +			label = "nvram";
> +			reg = <0x080000 0x0100000>;
> +		};
> +
> +		partition@...000{
> +			label = "devinfo";
> +			reg = <0x0180000 0x080000>;
> +		};
> +
> +		partition@...000 {
> +			label = "firmware";
> +			reg = <0x0200000 0x01D00000>;
> +			compatible = "brcm,trx";
> +		};
> +
> +		partition@...0000 {
> +			label = "failsafe";
> +			reg = <0x01F00000 0x01D00000>;
> +			read-only;
> +		};
> +
> +		partition@...200000 {

You would need to remove the 0x from the hex number here.

> +			label = "brcmnand";

Not sure how useful naming this partition brcmnand is, can we find a 
better name for it?
-- 
Florian

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