Re: [PATCH linux-next v5 1/1] spi: imx: dynamic burst length adjust for PIO mode

[Oleksij Rempel]

On Thu, Aug 10, 2017 at 01:50:08PM +0900, Jiada Wang wrote:
> 
> previously burst length (BURST_LENGTH) is always set to equal
> to bits_per_word, causes a 10us gap between each word in
> transfer, which significantly affects performance.
> 
> This patch uses 32 bits transfer to simulate lower bits transfer,
> and adjusts burst length runtimely to use biggeest burst length
> as possible to reduce the gaps in transfer for PIO mode.
> 
> Signed-off-by: Jiada Wang <jiada_wang@xxxxxxxxxx>

Tested-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |