Re: [PATCHv3 2/2] spi: imx: document use of native chip-selects in devicetree

[Greg Ungerer <gerg@xxxxxxxxxxxxxx>]

Hi Fabio,

On 19/07/17 10:37, Fabio Estevam wrote:
> Hi Greg,
> 
> On Tue, Jul 11, 2017 at 1:22 AM, Greg Ungerer <gerg@xxxxxxxxxxxxxx> wrote:
>> Document the "<0>" notation for specifying use of a native chip-select
>> in the "cs-gpios" tag of an SPI device in devicetree. This isn't unique
>> to the spi-imx driver, but this clearly spells out that you can use it
>> with this driver.
>>
>> Signed-off-by: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
> 
> Whic SoC did you use to test the native chip-select?
> 
> I remember that some old SoCs (mx27/mx31) used to have issues with
> native chip-select.

I tested on an iMX253. I have a board with a Silicon Labs 32260 SLIC
hooked up to an SPI interface on the 253 and I need the native chip
select timing for it.

Regards
Greg



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