# Re: \[PATCH v2 10/17\] dt-bindings: spi: add bindings for microchip mpfs spi

- From: Conor.Dooley@microchip.com
- Date: 2021-12-20 08:05:22 
- List: linux-i2c
- Page: https://ratatoskr.run/linux-i2c/2021/12/1613656
- Thread: https://ratatoskr.run/linux-gpio/2021/12/1612014/t.md

```text
On 17/12/2021 11:43, Mark Brown wrote:
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>
> On Fri, Dec 17, 2021 at 11:40:29AM +0000, Conor.Dooley@microchip.com 
wrote:
>> On 17/12/2021 11:17, Mark Brown wrote:
>>> Why do you need this property in the DT - isn't the number of chip
>>> selects in the IP a fixes property?
>>
>> Nope! It's an IP that's intended for use in FPGAs so the number of
>> selects may (and does) vary based on implementation.
>
> That doesn't explain why the number is needed in the binding - why do
> you need this property in the DT?

Took another look at the IP core configuration & I think you're right 
and that property can be dropped. The register responsible for CS 
control will not be optimised away even if the CS is not used & the 
worst outcome is that nothing will happen.
```