Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-06-08 Thread Sascha Hauer
On Thu, Jun 08, 2017 at 10:09:07PM -0700, Jiada Wang wrote: > On 06/01/2017 10:38 PM, Sascha Hauer wrote: > > On Thu, Jun 01, 2017 at 04:58:47AM -0700, Jiada Wang wrote: > > > Hi Sascha > > > > > > On 05/29/2017 02:50 AM, Sascha Hauer wrote: > > > > Hi, > > > > > > > > On Thu, May 25, 2017 at 10:

Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-06-08 Thread Jiada Wang
On 06/01/2017 10:38 PM, Sascha Hauer wrote: On Thu, Jun 01, 2017 at 04:58:47AM -0700, Jiada Wang wrote: Hi Sascha On 05/29/2017 02:50 AM, Sascha Hauer wrote: Hi, On Thu, May 25, 2017 at 10:02:42PM -0700, jiada_w...@mentor.com wrote: From: Jiada Wang previously burst length (BURST_LENGTH) is

Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-06-01 Thread Sascha Hauer
On Thu, Jun 01, 2017 at 04:58:47AM -0700, Jiada Wang wrote: > Hi Sascha > > On 05/29/2017 02:50 AM, Sascha Hauer wrote: > > Hi, > > > > On Thu, May 25, 2017 at 10:02:42PM -0700, jiada_w...@mentor.com wrote: > > > From: Jiada Wang > > > > > > previously burst length (BURST_LENGTH) is always set t

Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-06-01 Thread Jiada Wang
Hi Sascha On 05/29/2017 02:50 AM, Sascha Hauer wrote: Hi, On Thu, May 25, 2017 at 10:02:42PM -0700, jiada_w...@mentor.com wrote: From: Jiada Wang previously burst length (BURST_LENGTH) is always set to equal to bits_per_word, causes a 10us gap between each word in transfer, which significantl

Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-06-01 Thread Jiada Wang
Hello Fabio On 05/29/2017 04:07 AM, Fabio Estevam wrote: Hi Jiada, On Fri, May 26, 2017 at 2:02 AM, wrote: From: Jiada Wang 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

Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-05-29 Thread Fabio Estevam
Hi Jiada, On Fri, May 26, 2017 at 2:02 AM, wrote: > From: Jiada Wang > > 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

Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-05-29 Thread Sascha Hauer
Hi, On Thu, May 25, 2017 at 10:02:42PM -0700, jiada_w...@mentor.com wrote: > From: Jiada Wang > > 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

[PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

2017-05-25 Thread jiada_wang
From: Jiada Wang 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 b