From: marc.zyngier@arm•com (Marc Zyngier)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv2 8/8] ARM: dts: Add device tree sources for Exynos3250
Date: Tue, 15 Apr 2014 10:24:39 +0100 [thread overview]
Message-ID: <534CFAD7.4030508@arm.com> (raw)
In-Reply-To: <534CF9B4.306@samsung.com>
On 15/04/14 10:19, Chanwoo Choi wrote:
> On 04/15/2014 06:13 PM, Marc Zyngier wrote:
>> On 15/04/14 09:27, Chanwoo Choi wrote:
>>> Hi,
>>>
>>> On 04/15/2014 05:15 PM, Marc Zyngier wrote:
>>>> On 15/04/14 02:59, Chanwoo Choi wrote:
>>>>> From: Tomasz Figa <t.figa@samsung•com>
>>>>>
>>>>> This patch add new exynos3250.dtsi to support Exynos3250 SoC based on Cortex-A7
>>>>> dual core and includes following dt nodes:
>>>>>
>>>>> - GIC interrupt controller
>>>>> - Pinctrl to control GPIOs
>>>>> - Clock controller
>>>>> - CPU information (Cortex-A7 dual core)
>>>>> - UART to support serial port
>>>>> - MCT (Multi Core Timer)
>>>>> - ADC (Analog Digital Converter)
>>>>> - I2C/SPI bus
>>>>> - Power domain
>>>>> - PMU (Performance Monitoring Unit)
>>>>> - MSHC (Mobile Storage Host Controller)
>>>>> - PWM (Pluse Width Modulation)
>>>>> - AMBA bus
>>>>
>>>> [...]
>>>>
>>>> Where is the arch timer node?
>>>
>>> Exynos3250 uses MCT (Multi Core Timer) instead of ARM_ARCH_TIMER.
>>> - in drivers/clocksource/exynos_mct.c
>>
>> Don't you have a Cortex-A7? If so, you have the arch timer.
>
> Do you means that 'arch timer" is ARM_ARCH_TIMER?
Yes.
> As I knew, ARM_ARCH_TIMER is clocksource driver for system timer.
> But, Exynos SoC used MCT clocksource for system timer.
>
> Exynos dts file didn't include arch timer node but only include mct node.
Well, it is a bug, and a recurrent one. A Cortex-A7 has the arch timers
implemented. Always.
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0464f/BABFEBJJ.html
All Cortex-A7 have it, and so do A12, A15, A17, A53, A57.
Cheers,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2014-04-15 9:24 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-15 1:59 [PATCHv2 0/8] Support new Exynos3250 SoC based on Cortex-A7 dual core Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 1/8] ARM: EXYNOS: Add Exynos3250 SoC ID Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 2/8] ARM: EXYNOS: Add IO mapping for non-secure SYSRAM of Exynos3250 Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 3/8] ARM: EXYNOS: Add IO mapping for PMU " Chanwoo Choi
2014-04-15 8:11 ` Arnd Bergmann
2014-04-15 8:32 ` Chanwoo Choi
2014-04-15 8:39 ` Vikas Sajjan
2014-04-15 8:41 ` Chanwoo Choi
2014-04-15 8:46 ` Arnd Bergmann
2014-04-15 8:51 ` Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 4/8] ARM: EXYNOS: Support secondary CPU boot of Exynos4212 Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 5/8] ARM: EXYNOS: Support secondary CPU boot of Exynos3250 Chanwoo Choi
2014-04-15 5:09 ` Tushar Behera
2014-04-17 10:15 ` Chanwoo Choi
2014-04-16 14:28 ` Tomasz Figa
2014-04-17 8:04 ` Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 6/8] ARM: EXYNOS: Enter a15 lowpower mode for Exynos3250 based on Cortex-a7 Chanwoo Choi
2014-04-16 14:35 ` Tomasz Figa
2014-04-16 14:39 ` Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 7/8] clk: samsung: exynos3250: Add clocks using common clock framework Chanwoo Choi
2014-04-15 1:59 ` [PATCHv2 8/8] ARM: dts: Add device tree sources for Exynos3250 Chanwoo Choi
2014-04-15 8:15 ` Marc Zyngier
2014-04-15 8:27 ` Chanwoo Choi
2014-04-15 9:13 ` Marc Zyngier
2014-04-15 9:19 ` Chanwoo Choi
2014-04-15 9:24 ` Marc Zyngier [this message]
2014-04-16 8:22 ` Chanwoo Choi
2014-04-16 8:34 ` Marc Zyngier
2014-04-16 8:45 ` Chanwoo Choi
2014-04-16 10:23 ` Chanwoo Choi
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