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

[H. Nikolaus Schaller]

> Am 25.07.2018 um 10:18 schrieb H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>:
> 
> 
>> Am 25.07.2018 um 10:07 schrieb Ladislav Michl <ladis@xxxxxxxxxxxxxx>:
>> 
>> 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.

I should also mention that a modern and fully configured kernel binary is
already too big for a 4MB kernel partition.
> 
> 
>> 
>> 	ladis
>> 
>>> Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
>>> ---
>>> 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@80000 {
>>> 			label = "U-Boot";
>>> -			reg = <0x80000 0x1e0000>;
>>> +			reg = <0x80000 0x1c0000>;
>>> 		};
>>> 
>>> -		bootloaders_env@260000 {
>>> +		bootloaders_env@240000 {
>>> 			label = "U-Boot Env";
>>> -			reg = <0x260000 0x20000>;
>>> +			reg = <0x240000 0x40000>;
>>> 		};
>>> 
>>> 		kernel@280000 {
>>> 			label = "Kernel";
>>> -			reg = <0x280000 0x400000>;
>>> +			reg = <0x280000 0x600000>;
>>> 		};
>>> 
>>> -		filesystem@680000 {
>>> +		filesystem@880000 {
>>> 			label = "File System";
>>> -			reg = <0x680000 0xf980000>;
>>> +			reg = <0x880000 0>;	/* 0 = MTDPART_SIZ_FULL */
>>> 		};
>>> 	};
>>> };
>>> -- 
>>> 2.12.2
>>> 
>>> --
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> 
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