linux-kernel - Re: [UIO] SMX UIO interface

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Date:	Thu, 02 Sep 2010 12:13:30 +0200
From:	Armin Steinhoff <armin@...inhoff.de>
To:	Ben Nizette <bn@...sdigital.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [UIO]  SMX UIO interface

  Ben Nizette wrote:
> On 01/09/2010, at 5:22 PM, Armin Steinhoff wrote:
>
>> Hi Ben,
>>
>> I have a question about the SMX UIO Interface.
>>
>> In the SMX module you are reading the data of the platform resourses:
>>
>>     regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
>>     if (!regs) {
>>         dev_err(&dev->dev, "No memory resource specified\n");
>>         goto out_free;
>>     }
>>
>> But who sets these data initially ?
> Who ever sets up the platform device that will bind to this driver, usually the board code (eg on avr32 arch/avr32/boards/*/setup.c, ARM is somewhere under arch/arm/mach-*/ I think).
>
> The board code would create an array of struct resource with the appropriate memory regions and an IRQ entry, create a struct platform_device with the right content to bind to that driver, set the platform_device .resource field to the previously created array then call platform_device_register() to kick things off.
>

   That means there is additionally an individual driver of the board 
and the UIO interface is just for open up the hardware interfaces ?

   Thanks

--Armin


> 	--Ben.
>
>> Cheers
>>
>> --Armin
>>
>

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