Using DMA

[Rajasekaran Kaliyaperumal, Chennai]

HI, 

I would like to port a linux kernel to a 8051 Microcontroller
C8051F120(128kB flash memory 8KB Ram ). 

Is this really possible? 

What book would help me in porting a linux kernel to a modest
microcontroller such as 8051? 

Any help would be greatly appreciated


Thanks in Advance 
   K.Rajasekaran.
-----Original Message-----
From: linuxppc-embedded-bounces+rajasekaran.k=hcl.in at ozlabs.org
[mailto:linuxppc-embedded-bounces+rajasekaran.k=hcl.in at ozlabs.org] On
Behalf Of Bruce_Leonard at selinc.com
Sent: Monday, November 10, 2008 11:29 PM
To: Timur Tabi
Cc: timur.tabi at gmail.com; linuxppc-embedded at ozlabs.org
Subject: Re: Using DMA

Timur Tabi <timur at freescale.com> wrote on 11/10/2008 06:35:21 AM:

> Bruce_Leonard at selinc.com wrote:
> 
> > Is there something else I need to do?  Or is there something wrong 
with my 
> > device tree (always a possibility :)  ).  Any help is appreciated.
> 
> You might need to add something like this:
> 
> static struct of_device_id __initdata mpc8610_ids[] = {
>          { .compatible = "fsl,mpc8610-immr", },
>          { .compatible = "simple-bus", },
>          {}
> };
> static int __init mpc8610_declare_of_platform_devices(void)
> {
>          /* Without this call, the SSI device driver won't get probed.

*/
>          of_platform_bus_probe(NULL, mpc8610_ids, NULL);
>          return 0;
> }
> machine_device_initcall(mpc86xx_hpcd, 
mpc8610_declare_of_platform_devices);
> 
> -- 
> Timur Tabi
> Linux Kernel Developer @ Freescale

Something like that already exists in 
/arch/powerpc/platforms/83xx/mpc834x_itx.c, which I'm using.  Only real 
difference is the first compatible flag is:

..compatible = "fsl,pq2pro-localbus"

Which I presume is correct since other drivers load and work correctly 
based on what's in the device tree.

Bruce
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