On 6/21/22 07:49, Conor Dooley wrote:
>
>
> On 20/06/2022 23:46, Damien Le Moal wrote:
>> On 6/21/22 06:06, Conor.Dooley@xxxxxxxxxxxxx wrote:
>>> On 20/06/2022 21:56, Serge Semin wrote:
>>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>>
>>>> On Sat, Jun 18, 2022 at 01:30:28PM +0100, Conor Dooley wrote:
>>>>> From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>>>>>
>>>>> snps,dwc-ssi-1.01a has a single user - the Canaan k210, which uses a
>>>>> width of 4 for spi-{r,t}x-bus-width. Update the binding to reflect
>>>>> this.
>>>>>
>>>>> Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>>>>> ---
>>>>> .../bindings/spi/snps,dw-apb-ssi.yaml | 48 ++++++++++++++-----
>>>>> 1 file changed, 35 insertions(+), 13 deletions(-)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>>>>> index e25d44c218f2..f2b9e3f062cd 100644
>>>>> --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>>>>> +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>>>>> @@ -135,19 +135,41 @@ properties:
>>>>> of the designware controller, and the upper limit is also subject to
>>>>> controller configuration.
>>>>>
>>>>> -patternProperties:
>>>>> - "^.*@[0-9a-f]+$":
>>>>> - type: object
>>>>> - properties:
>>>>> - reg:
>>>>> - minimum: 0
>>>>> - maximum: 3
>>>>> -
>>>>> - spi-rx-bus-width:
>>>>> - const: 1
>>>>> -
>>>>> - spi-tx-bus-width:
>>>>> - const: 1
>>>>> +if:
>>>>> + properties:
>>>>> + compatible:
>>>>> + contains:
>>>>> + const: snps,dwc-ssi-1.01a
>>>>> +
>>>>> +then:
>>>>> + patternProperties:
>>>>> + "^.*@[0-9a-f]+$":
>>>>> + type: object
>>>>> + properties:
>>>>> + reg:
>>>>> + minimum: 0
>>>>> + maximum: 3
>>>>> +
>>>>> + spi-rx-bus-width:
>>>>> + const: 4
>>>>> +
>>>>> + spi-tx-bus-width:
>>>>> + const: 4
>>>>> +
>>>>> +else:
>>>>> + patternProperties:
>>>>> + "^.*@[0-9a-f]+$":
>>>>> + type: object
>>>>> + properties:
>>>>> + reg:
>>>>> + minimum: 0
>>>>> + maximum: 3
>>>>> +
>>>>> + spi-rx-bus-width:
>>>>> + const: 1
>>>>> +
>>>>> + spi-tx-bus-width:
>>>>> + const: 1
>>>>
>>>> You can just use a more relaxed constraint "enum: [1 2 4 8]" here
>>>
>>> 8 too? sure.
>>>
>>>> irrespective from the compatible string. The modern DW APB SSI
>>>> controllers of v.4.* and newer also support the enhanced SPI Modes too
>>>> (Dual, Quad and Octal). Since the IP-core version is auto-detected at
>>>> run-time there is no way to create a DT-schema correctly constraining
>>>> the Rx/Tx SPI bus widths. So let's keep the
>>>> compatible-string-independent "patternProperties" here but just extend
>>>> the set of acceptable "spi-rx-bus-width" and "spi-tx-bus-width"
>>>> properties values.
>>>
>>> SGTM!
>>>
>>>>
>>>> Note the DW APB SSI/AHB SSI driver currently doesn't support the
>>>> enhanced SPI modes. So I am not sure whether the multi-lines Rx/Tx SPI
>>>> bus indeed works for Canaan K210 AHB SSI controller. AFAICS from the
>>>> DW APB SSI v4.01a manual the Enhanced SPI mode needs to be properly
>>>> activated by means of the corresponding CSR. So most likely the DW AHB
>>>> SSI controllers need some specific setups too.
>>>
>>> hmm, well I'll leave that up to people that have Canaan hardware!
>>
>> I will test this series.
>>
>
> Cool, thanks.
> I'll try to get a respin out tomorrow w/ the memory node "unfixed".
OK. I will test that then :)
> Conor.
>
>>> Thanks,
>>> Conor.
>>>
>>>>
>>>> -Sergey
>>>>
>>>>>
>>>>> unevaluatedProperties: false
>>>>>
>>>>> --
>>>>> 2.36.1
>>>>>
>>>
>>
>>
--
Damien Le Moal
Western Digital Research
