Re: [RESEND PATCH] rtc: ds1343: Force SPI chip select to be active high

[Ian Abbott <abbotti@mev.co.uk>]

On 11/07/2024 15:21, Mark Brown wrote:
> On Thu, Jul 11, 2024 at 03:05:01PM +0100, Ian Abbott wrote:
> 
>> I think the devicetree node for the RTC device ought to be setting
>> `spi-cs-high` but cannot do so at the moment because the driver clobbers it.
> 
> Specifying spi-cs-high in the device tree should almost always be
> redundant or a mistake, if the device needs a high chip select then we
> already know that from the compatible.  The property is adding nothing
> but potential confusion, in the normal course of affairs the driver
> should just specify the configuration it needs for the bus.

So `spi->mode |= SPI_CS_HIGH;` is safer than `spi->mode ^= SPI_CS_HIGH;`?

Regarding `spi-cs-high` in the device tree, what about the compatibility 
table for `spi-cs-high` and `cs-gpio` active level in 
"Documentation/devicetree/bindings/spi/spi-controller.yaml"?

-- 
-=( Ian Abbott <abbotti@mev.co.uk> || MEV Ltd. is a company  )=-
-=( registered in England & Wales.  Regd. number: 02862268.  )=-
-=( Regd. addr.: S11 & 12 Building 67, Europa Business Park, )=-
-=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=-