linux-kernel - Re: [PATCH] ARM: dts: Fix booting on Rinato market device

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Message-id: <54600EC7.4020008@samsung.com>
Date:	Mon, 10 Nov 2014 10:03:03 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Kukjin Kim <kgene@...nel.org>
Cc:	'Krzysztof Kozlowski' <k.kozlowski@...sung.com>,
	'Ben Dooks' <ben-linux@...ff.org>,
	'Rob Herring' <robh+dt@...nel.org>,
	'Pawel Moll' <pawel.moll@....com>,
	'Mark Rutland' <mark.rutland@....com>,
	'Ian Campbell' <ijc+devicetree@...lion.org.uk>,
	'Kumar Gala' <galak@...eaurora.org>,
	'Russell King' <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	'Kyungmin Park' <kyungmin.park@...sung.com>,
	'BartlomiejZolnierkiewicz' <b.zolnierkie@...sung.com>
Subject: Re: [PATCH] ARM: dts: Fix booting on Rinato market device

Dear Kukjin,

On 11/08/2014 07:16 PM, Kukjin Kim wrote:
> Krzysztof Kozlowski wrote:
>>
>> On pią, 2014-11-07 at 20:50 +0900, Chanwoo Choi wrote:
>>> Hi Krzysztof,
>>>
>>> On 11/07/2014 08:44 PM, Krzysztof Kozlowski wrote:
>>>> The bootloader on market Rinato (Gear 2) device checks for revision in
>>>> compatible field of DTB. If it is not present or lower than required
>>>> then booting fails with: "Could not do normal boot. (no DTB found)".
>>>>
>>>> Log of bootloader in case of failure:
>>>> h/w: revision  = 0x06
>>>> h/w: schematic = SM-R380_Rev0.5_Final_0205
>>>> date = 2000/01/01 12:00:21 (UTC)
>>>> cmu_div:4, div:5, src_clk:800000000, pixel_clk:31860720
>>>> load_kernel: loading boot image from 57344.. (BOOT)
>>>> load_kernel: found zImage, size: 0x3267e8
>>>> 0xbc Error!
>>>> Verify_Binary_Signature: failed.
>>>> pit_check_signature (BOOT) invalid.
>>>> load_kernel: found custom kernel (ret:-2147483647)
>>>>  No need to update kernel type.
>>>> Detected board: samsung,rinato-rev06
>>>> Could not do normal boot. (no DTB found)
>>>> : Entering usb mode for SM-R380_EUR_XX (65535)..
>>>>
>>>> Add a "rev06" suffix to compatible to satisfy the bootloader.
>>>>
>>>> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
>>>> ---
>>>>  arch/arm/boot/dts/exynos3250-rinato.dts | 3 ++-
>>>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
>>>> index 84380fa13e37..f72ba0a1d915 100644
>>>> --- a/arch/arm/boot/dts/exynos3250-rinato.dts
>>>> +++ b/arch/arm/boot/dts/exynos3250-rinato.dts
>>>> @@ -18,7 +18,8 @@
>>>>
>>>>  / {
>>>>  	model = "Samsung Rinato board";
>>>> -	compatible = "samsung,rinato", "samsung,exynos3250", "samsung,exynos3";
>>>> +	compatible = "samsung,rinato", "samsung,rinato-rev06",
>>>> +			"samsung,exynos3250", "samsung,exynos3";
>>>
>>> I think it is wrong. The released bootloader from Samsung is not u-boot.
>>> Instead, you have to update u-boot to support Exynos3250-basd Rinato board.
>>
>> The bootloader on device also was not a u-boot. So the fix is for native
>> bootloader delivered on device.
>>
>> I do not insist that this is proper fix. It was just needed to boot the
>> device with custom kernel.
>>
>> Anyway, thanks for comments!
>>
> Hi Krzysztof and Chanwoo,
> 
> So, we don’t need this to fix the problem Krzysztof said? OK.

Yes.
The released bootloader from Samsung is not general and not opened.
We have to support Exynos3250-based Rinato on general bootloader.

Beset Regards,
Chanwoo Choi
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