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 10:18:28 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Ladislav Michl <ladis@...ux-mips.org>
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


> Am 25.07.2018 um 10:07 schrieb Ladislav Michl <ladis@...ux-mips.org>:
> 
> 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.

With what? Nobody is using the old u-boot partition scheme any more
(it is >5 years old).

> So once you are touching this
> what about relying on partitioning provided by bootloader just to prevent
> something like this happening again?

Well, we define what compatible means here (since we are the vendor).
And people complain with us. We simply recommend them to upgrade the
boot-loader.

BR,
Nikolaus

> 
> 	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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