Re: [PATCH 1/9] spi: atmel-quadspi: optimize qspi init

[<Tudor.Ambarus@xxxxxxxxxxxxx>]

On 01/30/2019 07:15 PM, Boris Brezillon wrote:
> On Wed, 30 Jan 2019 15:08:29 +0000
> <Tudor.Ambarus@xxxxxxxxxxxxx> wrote:
> 
>> From: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
>>
>> Set the QSPI controller in Serial Memory Mode at init and not
>> at each exec_op() call.
> 
> If you ever want to support regular SPI you'll have to put it back to
> atmel_qspi_exec_op(), so I'm not sure this is a good move. Another
> approach would be to cache the MR value to avoid doing a write access
> on the bus when the value hasn't changed.

I'll cache MR value, thanks!

ta