linux-kernel - Re: [PATCH 09/32] ARM: dts: omap3-gta04: make NAND partitions compatible with recent U-Boot

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Date:   Wed, 25 Jul 2018 10:07:35 +0200
From:   Ladislav Michl <ladis@...ux-mips.org>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Marek Belisko <marek@...delico.com>,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, letux-kernel@...nphoenux.org
Subject: Re: [PATCH 09/32] ARM: dts: omap3-gta04: make NAND partitions
 compatible with recent U-Boot

On Wed, Jul 25, 2018 at 08:58:41AM +0200, H. Nikolaus Schaller wrote:
> Vendor defined U-Boot has changed the partition scheme a while ago:
> 
> * kernel partition 6MB
> * file system partition uses the remainder up to end of the NAND
> * increased size of the environment partition (to get an OneNAND compatible base address)
> * shrink the U-Boot partition
> 
> Let's be compatible (e.g. Debian kernel built from upstream).

That, in fact, is breaking compatibility. So once you are touching this
what about relying on partitioning provided by bootloader just to prevent
something like this happening again?

	ladis

> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
> ---
>  arch/arm/boot/dts/omap3-gta04.dtsi | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/omap3-gta04.dtsi b/arch/arm/boot/dts/omap3-gta04.dtsi
> index 65f77a0b5dd4..03fe404cbf56 100644
> --- a/arch/arm/boot/dts/omap3-gta04.dtsi
> +++ b/arch/arm/boot/dts/omap3-gta04.dtsi
> @@ -645,22 +645,22 @@
>  
>  		bootloaders@...00 {
>  			label = "U-Boot";
> -			reg = <0x80000 0x1e0000>;
> +			reg = <0x80000 0x1c0000>;
>  		};
>  
> -		bootloaders_env@...000 {
> +		bootloaders_env@...000 {
>  			label = "U-Boot Env";
> -			reg = <0x260000 0x20000>;
> +			reg = <0x240000 0x40000>;
>  		};
>  
>  		kernel@...000 {
>  			label = "Kernel";
> -			reg = <0x280000 0x400000>;
> +			reg = <0x280000 0x600000>;
>  		};
>  
> -		filesystem@...000 {
> +		filesystem@...000 {
>  			label = "File System";
> -			reg = <0x680000 0xf980000>;
> +			reg = <0x880000 0>;	/* 0 = MTDPART_SIZ_FULL */
>  		};
>  	};
>  };
> -- 
> 2.12.2
> 
> --
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