TI OMAP device tree and DSPs?

TI OMAP device tree and DSPs?

[Kumar Gala]

Seen a lot of ARM & TI OMAP discussions on this list.  I was wondering if the DSPs on any devices that have ARM + DSP are represented in the device trees yet.

If so can someone point me at an example.

thanks

- k

Re: TI OMAP device tree and DSPs?

[Cousson, Benoit]

On 12/8/2011 5:07 PM, Kumar Gala wrote:
> Seen a lot of ARM&  TI OMAP discussions on this list.  I was
> wondering if the DSPs on any devices that have ARM + DSP are
> represented in the device trees yet.

So far, for the OMAP case, the DSP node is mostly empty.

The issue is that I'm not sure we can represent in the same DT both MPU 
and DSP view, since the DT root is supposed to represent a processor.
If we need the real DSP viewpoint, we will have to mostly duplicate the 
MPU view then remove MPU private peripherals and add the DSP private 
peripherals.

Regards,
Benoit

Re: TI OMAP device tree and DSPs?

[Kumar Gala]

On Dec 8, 2011, at 10:58 AM, Cousson, Benoit wrote:

> On 12/8/2011 5:07 PM, Kumar Gala wrote:
>> Seen a lot of ARM&  TI OMAP discussions on this list.  I was
>> wondering if the DSPs on any devices that have ARM + DSP are
>> represented in the device trees yet.
> 
> So far, for the OMAP case, the DSP node is mostly empty.
> 
> The issue is that I'm not sure we can represent in the same DT both MPU and DSP view, since the DT root is supposed to represent a processor.
> If we need the real DSP viewpoint, we will have to mostly duplicate the MPU view then remove MPU private peripherals and add the DSP private peripherals.
> 
> Regards,
> Benoit

Is there pointer to an example dts that show whatever you have for DSP ?

- k

Re: TI OMAP device tree and DSPs?

[Cousson, Benoit]

On 12/8/2011 10:03 PM, Kumar Gala wrote:
> 
> On Dec 8, 2011, at 10:58 AM, Cousson, Benoit wrote:
> 
>> On 12/8/2011 5:07 PM, Kumar Gala wrote:
>>> Seen a lot of ARM&   TI OMAP discussions on this list.  I was
>>> wondering if the DSPs on any devices that have ARM + DSP are
>>> represented in the device trees yet.
>>
>> So far, for the OMAP case, the DSP node is mostly empty.
>>
>> The issue is that I'm not sure we can represent in the same DT both MPU and DSP view, since the DT root is supposed to represent a processor.
>> If we need the real DSP viewpoint, we will have to mostly duplicate the MPU view then remove MPU private peripherals and add the DSP private peripherals.
>>
>> Regards,
>> Benoit
> 
> Is there pointer to an example dts that show whatever you have for DSP ?

Well this is really empty :-)

Extract from the arch/arm/dts/omap3.dtsi

	soc {
		compatible = "ti,omap-infra";
		mpu {
			compatible = "ti,omap3-mpu";
			ti,hwmods = "mpu";
		};

		iva {
			compatible = "ti,iva2.2";
			ti,hwmods = "iva";

			dsp {
				compatible = "ti,omap3-c64";
			};
		};
	};

Regards,
Benoit