linux-kernel - Re: [PATCHv4 7/7] ARM: dts: Add device tree sources for Exynos3250

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Date:	Fri, 09 May 2014 15:49:58 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Tomasz Figa <tomasz.figa@...il.com>
Cc:	kgene.kim@...sung.com, t.figa@...sung.com,
	linux-kernel@...r.kernel.org, linux@....linux.org.uk,
	ben-linux@...ff.org, arnd@...db.de, olof@...om.net,
	marc.zyngier@....com, thomas.abraham@...aro.org,
	kyungmin.park@...sung.com, inki.dae@...sung.com,
	sw0312.kim@...sung.com, hyunhee.kim@...sung.com,
	yj44.cho@...sung.com, chanho61.park@...sung.com,
	sajjan.linux@...il.com, tushar.behera@...aro.org,
	sachin.kamat@...aro.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	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>
Subject: Re: [PATCHv4 7/7] ARM: dts: Add device tree sources for Exynos3250

Hi Tomasz,

On 04/26/2014 08:38 PM, Tomasz Figa wrote:
> On 26.04.2014 02:51, Tomasz Figa wrote:
>> Hi Chanwoo,
>>
>> On 25.04.2014 03:16, Chanwoo Choi wrote:
>>> From: Tomasz Figa <t.figa@...sung.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
>>>
>>> Signed-off-by: Tomasz Figa <t.figa@...sung.com>
>>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>>> Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
>>> Signed-off-by: Inki Dae <inki.dae@...sung.com>
>>> Signed-off-by: Hyunhee Kim <hyunhee.kim@...sung.com>
>>> Signed-off-by: Jaehoon Chung <jh80.chung@...sung.com>
>>> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
>>> Cc: Ben Dooks <ben-linux@...ff.org>
>>> Cc: Kukjin Kim <kgene.kim@...sung.com>
>>> Cc: Rob Herring <robh+dt@...nel.org>
>>> Cc: Pawel Moll <pawel.moll@....com>
>>> Cc: Mark Rutland <mark.rutland@....com>
>>> Cc: Ian Campbell <ijc+devicetree@...lion.org.uk>
>>> Cc: Kumar Gala <galak@...eaurora.org>
>>> Cc: Russell King <linux@....linux.org.uk>
>>> Cc: devicetree@...r.kernel.org
>>> ---
>>>   arch/arm/boot/dts/exynos3250-pinctrl.dtsi | 477 +++++++++++++++
>>>   arch/arm/boot/dts/exynos3250.dtsi         | 405 +++++++++++++
>>>   arch/arm/boot/dts/exynos4212-tizenw.dts   | 926
>>> ++++++++++++++++++++++++++++++
>>>   3 files changed, 1808 insertions(+)
>>>   create mode 100644 arch/arm/boot/dts/exynos3250-pinctrl.dtsi
>>>   create mode 100644 arch/arm/boot/dts/exynos3250.dtsi
>>>   create mode 100644 arch/arm/boot/dts/exynos4212-tizenw.dts
>>>
>>> diff --git a/arch/arm/boot/dts/exynos3250-pinctrl.dtsi
>>> b/arch/arm/boot/dts/exynos3250-pinctrl.dtsi
>>> new file mode 100644
>>> index 0000000..976490b
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/exynos3250-pinctrl.dtsi
>>> @@ -0,0 +1,477 @@
>>> +/*
>>> + * Samsung's Exynos3250 SoCs pin-mux and pin-config device tree source
>>> + *
>>> + * Copyright (c) 2014 Samsung Electronics Co., Ltd.
>>> + *        http://www.samsung.com
>>> + *
>>> + * Samsung's Exynos3250 SoCs pin-mux and pin-config optiosn are
>>> listed as device
>>> + * tree nodes are listed in this file.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License version 2 as
>>> + * published by the Free Software Foundation.
>>> +*/
>>> +
>>> +/ {
>>> +    pinctrl@...00000 {
>>
>> Could you use references instead of re-specifying the whole tree
>> hierarchy in every file a node is used?
>>
>> Instead of
>>
>> / {
>>      pinctrl@...00000 {
>>
>>      };
>> };
>>
>> one may simply use
>>
>> &pinctrl_0 {
>>
>> };
>>
>> You might just need to change the location of #include
>> "exynos3250-pinctrl.dtsi" from top of exynos3250.dtsi to bottom of it.
> 
> Oh, well, you also should move all nodes of on-SoC devices under a simple-bus node called soc. You can see the patch adding dts file for Exynos5260 for an example [1].
> 
> [1] http://thread.gmane.org/gmane.linux.kernel.samsung-soc/29360/focus=29361


OK, I'll move nodes dependent on SoC under 'soc' dt node as example patch[1] except for 'amba-bus' dt node.

Thanks,
Chanwoo Choi

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