On 18/09/2019 16.29, Rob Herring wrote:
> On Tue, Sep 10, 2019 at 02:45:58PM +0300, Peter Ujfalusi wrote:
>> Similarly to paRAM slots, channels can be used by other cores.
>>
>> The common dma-channel-mask property can be used for specifying the
>> available channels.
>>
>> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
>> ---
>> Documentation/devicetree/bindings/dma/ti-edma.txt | 6 ++++++
>> 1 file changed, 6 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
>> index 4bbc94d829c8..3c7736246354 100644
>> --- a/Documentation/devicetree/bindings/dma/ti-edma.txt
>> +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
>> @@ -42,6 +42,9 @@ Optional properties:
>> - ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
>> the driver, they are allocated to be used by for example the
>> DSP. See example.
>> +- dma-channel-mask: Mask of usable channels, see
>> + Documentation/devicetree/bindings/dma/dma-common.yaml
>> +
>
> What's the size? 2 cells?
Depending on the EDMA, some have 32, some have 64 channels. I'll update
the patch to reflect this.
>>
>> ------------------------------------------------------------------------------
>> eDMA3 Transfer Controller
>> @@ -91,6 +94,9 @@ edma: edma@49000000 {
>> ti,edma-memcpy-channels = <20 21>;
>> /* The following PaRAM slots are reserved: 35-44 and 100-109 */
>> ti,edma-reserved-slot-ranges = <35 10>, <100 10>;
>> + /* The following channels are reserved: 35-44 */
>> + dma-channel-mask = <0xffffffff>, /* Channel 0-31 */
>> + <0xffffe007>; /* Channel 32-63 */
>> };
>>
>> edma_tptc0: tptc@49800000 {
>> --
>> Peter
>>
>> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
>> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
>>
- Péter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
