linux-kernel - Re: [PATCH 16/19] arm64: dts: exynos: Add dts files for 64-bit Exynos5433 SoC

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Date:	Fri, 28 Nov 2014 22:51:03 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mark Rutland <Mark.Rutland@....com>,
	"jh80.chung@...sung.com" <jh80.chung@...sung.com>,
	"geunsik.lim@...sung.com" <geunsik.lim@...sung.com>,
	"kgene.kim@...sung.com" <kgene.kim@...sung.com>,
	"arnd@...db.de" <arnd@...db.de>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	Will Deacon <Will.Deacon@....com>,
	"tomasz.figa@...il.com" <tomasz.figa@...il.com>,
	"a.kesavan@...sung.com" <a.kesavan@...sung.com>,
	"inki.dae@...sung.com" <inki.dae@...sung.com>,
	"sw0312.kim@...sung.com" <sw0312.kim@...sung.com>,
	"kyungmin.park@...sung.com" <kyungmin.park@...sung.com>,
	"thomas.abraham@...aro.org" <thomas.abraham@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"s.nawrocki@...sung.com" <s.nawrocki@...sung.com>,
	"olof@...om.net" <olof@...om.net>,
	"chanho61.park@...sung.com" <chanho61.park@...sung.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 16/19] arm64: dts: exynos: Add dts files for 64-bit
 Exynos5433 SoC

Dear Marc,

On 11/27/2014 07:26 PM, Marc Zyngier wrote:
> On 27/11/14 07:35, Chanwoo Choi wrote:
>> This patch adds new Exynos5433 dtsi to support 64-bit Exynos5433 SoC
>> based on Octal core CPUs (quad Cortex-A57 and quad Cortex-A53).
>>
>> Cc: Kukjin Kim <kgene.kim@...sung.com>
>> Cc: Mark Rutland <mark.rutland@....com>
>> Cc: Arnd Bergmann <arnd@...db.de>
>> Cc: Olof Johansson <olof@...om.net>
>> Cc: Catalin Marinas <catalin.marinas@....com>
>> Cc: Will Deacon <will.deacon@....com>
>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>> Acked-by: Inki Dae <inki.dae@...sung.com>
>> Acked-by: Geunsik Lim <geunsik.lim@...sung.com>
>> ---
>>  arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi | 698 +++++++++++++++++++++
>>  arch/arm64/boot/dts/exynos/exynos5433.dtsi         | 523 +++++++++++++++
>>  2 files changed, 1221 insertions(+)
>>  create mode 100644 arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi
>>  create mode 100644 arch/arm64/boot/dts/exynos/exynos5433.dtsi
>>
> 
> [...]
> 
>> diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
>> new file mode 100644
>> index 0000000..3d8b576
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
> 
> [...]
> 
>> +               timer {
>> +                       compatible = "arm,armv8-timer";
>> +                       interrupts = <1 13 0xff01>,
>> +                                    <1 14 0xff01>,
>> +                                    <1 11 0xff01>,
>> +                                    <1 10 0xff01>;
> 
> This is wrong. Timer interrupts for both A53 and A57 are level triggered.

I'll fix it level triggering instead of edge triggering.

If possible, could you give the document url to check the correct type of level trigger?
whether irq is high level trigger or low level trigger.

> 
>> +                       clock-frequency = <24000000>;
> 
> Please go and fix your firmware. Really...
> 
>> +                       use-clocksource-only;
>> +                       use-physical-timer;
>> +               };
> 
> Well, that's a total NAK. Neither of these properties are part of the
> binding, and we've already established that none of that would never be
> valid on arm64.
> 
> I suggest you finally do what we've been asking for years, which is to
> fix your boot ROM by adding the 5 lines of assembly code that are needed
> instead of repeatedly post the same bogus DT files.

I'll remove last three properties.

Best Regards,
Chanwoo Choi


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