From: wmb@firmworks•com (Mitch Bradley)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 2/7] arm/dts: OMAP3: Add mpu and iva nodes
Date: Mon, 05 Sep 2011 07:46:18 -1000 [thread overview]
Message-ID: <4E650AEA.2090109@firmworks.com> (raw)
In-Reply-To: <201109051923.51084.arnd@arndb.de>
On 9/5/2011 7:23 AM, Arnd Bergmann wrote:
> On Monday 05 September 2011, Cousson, Benoit wrote:
>> Yeah, I saw that in the "cpus" node documentation. My point here is that
>> I do need to represent the MPU subsystem that will contain the cpus. And
>> thus the Cortex is inside the MPU subsystem.
The device tree hierarchy does not represent "containment", but rather
addressing from the standpoint of a program running on a CPU.
From that viewpoint, it might be better to have a phandle reference to
the mpu in each CPU node.
>>
>> I can potentially keep the CPUs inside the cpus node, and just represent
>> the mpu node inside the soc, with potentially some phandle to the real
>> cpu nodes.
>>
>> Something like that:
>>
>> cpus {
>> cpu0: cpu at 0 {
>> compatible = "arm,cortex-a8";
>> };
>> };
>>
>> [...]
>>
>> soc {
>> compatible = "ti,omap-infra";
>> mpu {
>> compatible = "ti,omap3-mpu";
>> hwmods = "mpu";
>> cpu at 0 {
>> phandle =<&cpu0>;
>> [...]
>> };
>> };
>> };
>
> Yes, that looks good. I wouldn't name the attribute "phandle" if I could
> think of anything better (which I can't at the moment).
>
> Arnd
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> devicetree-discuss mailing list
> devicetree-discuss at lists.ozlabs.org
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>
next prev parent reply other threads:[~2011-09-05 17:46 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-01 17:25 [PATCH 0/7] OMAP3: Add basic DT support + i2c + twl Benoit Cousson
2011-09-01 17:25 ` [PATCH 1/7] arm/dts: Add initial device-tree support for OMAP3 SoC Benoit Cousson
2011-09-01 17:25 ` [PATCH 2/7] arm/dts: OMAP3: Add mpu and iva nodes Benoit Cousson
2011-09-01 18:17 ` Arnd Bergmann
2011-09-05 15:05 ` Cousson, Benoit
2011-09-05 17:23 ` Arnd Bergmann
2011-09-05 17:46 ` Mitch Bradley [this message]
2011-09-06 7:15 ` Cousson, Benoit
2011-09-01 17:25 ` [PATCH 3/7] arm/dts: OMAP3: Add i2c controllers nodes Benoit Cousson
2011-09-01 17:25 ` [PATCH 4/7] arm/dts: omap3-beagle: Include the generic omap3.dtsi Benoit Cousson
2011-09-01 17:25 ` [PATCH 5/7] arm/dts: omap3-beagle: Add twl4030 and EEPROM i2c devices Benoit Cousson
2011-09-01 17:25 ` [PATCH 6/7] OMAP3: board-dt: Add generic board file for DT support Benoit Cousson
2011-09-02 8:09 ` Tony Lindgren
2011-09-02 8:46 ` Cousson, Benoit
2011-09-02 9:08 ` Russell King - ARM Linux
2011-09-02 9:13 ` Cousson, Benoit
2011-09-02 9:21 ` Russell King - ARM Linux
2011-09-02 9:34 ` Cousson, Benoit
2011-09-02 10:43 ` Tony Lindgren
2011-09-02 11:43 ` Cousson, Benoit
2011-09-02 11:57 ` Tony Lindgren
2011-09-02 12:20 ` Cousson, Benoit
2011-09-02 12:32 ` Tony Lindgren
2011-09-05 12:09 ` G, Manjunath Kondaiah
2011-09-01 17:25 ` [PATCH 7/7] OMAP3: beagleboard: Remove DT support from regular board Benoit Cousson
2011-09-02 8:12 ` Tony Lindgren
2011-09-02 8:59 ` Cousson, Benoit
2011-09-02 10:48 ` Tony Lindgren
2011-09-02 12:35 ` Cousson, Benoit
2011-09-02 13:08 ` Tony Lindgren
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