Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-18 Thread Vignesh R
On 09/16/2015 04:26 PM, Mark Brown wrote: > On Wed, Sep 16, 2015 at 03:38:09PM +0530, Vignesh R wrote: > >> But, I didn't get how to integrate with existing message queue. Memory >> mapped read by-passes message queue of SPI core. Could you please >> explain a bit more on integrating with messag

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-16 Thread Michal Suchanek
On 16 September 2015 at 14:46, Jagan Teki wrote: > On 15 September 2015 at 00:05, Mark Brown wrote: >> On Fri, Sep 04, 2015 at 04:55:33PM +0530, Jagan Teki wrote: >>> On 4 September 2015 at 13:59, Vignesh R wrote: >> >>> > + * @spi_mtd_mmap_read: some spi-controller hardwares provide memory >>>

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-16 Thread Mark Brown
On Wed, Sep 16, 2015 at 06:16:55PM +0530, Jagan Teki wrote: > On 15 September 2015 at 00:05, Mark Brown wrote: > > There seem to be a reasonable number of SPI controllers out there which > > have as an extension the ability to do memory mapped reads but are > > otherwise perfectly normal SPI cont

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-16 Thread Jagan Teki
On 15 September 2015 at 00:05, Mark Brown wrote: > On Fri, Sep 04, 2015 at 04:55:33PM +0530, Jagan Teki wrote: >> On 4 September 2015 at 13:59, Vignesh R wrote: > >> > + * @spi_mtd_mmap_read: some spi-controller hardwares provide memory >> > + * mapped interface to communicate

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-16 Thread Mark Brown
On Wed, Sep 16, 2015 at 03:38:09PM +0530, Vignesh R wrote: > But, I didn't get how to integrate with existing message queue. Memory > mapped read by-passes message queue of SPI core. Could you please > explain a bit more on integrating with message queue? Did you mean > locking the existing messag

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-16 Thread Vignesh R
On 09/15/2015 12:05 AM, Mark Brown wrote: > On Fri, Sep 04, 2015 at 04:55:33PM +0530, Jagan Teki wrote: >> On 4 September 2015 at 13:59, Vignesh R wrote: > >>> + * @spi_mtd_mmap_read: some spi-controller hardwares provide memory >>> + * mapped interface to communicate with m

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-16 Thread Vignesh R
On 09/15/2015 12:07 AM, Mark Brown wrote: > On Fri, Sep 04, 2015 at 01:59:58PM +0530, Vignesh R wrote: >> In addition to providing direct access to SPI bus, some spi controller >> hardwares (like ti-qspi) provide special memory mapped port >> to accesses SPI flash devices in order to increase rea

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-14 Thread Mark Brown
On Fri, Sep 04, 2015 at 01:59:58PM +0530, Vignesh R wrote: > In addition to providing direct access to SPI bus, some spi controller > hardwares (like ti-qspi) provide special memory mapped port > to accesses SPI flash devices in order to increase read performance. > This means the controller can au

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-14 Thread Mark Brown
On Fri, Sep 04, 2015 at 04:55:33PM +0530, Jagan Teki wrote: > On 4 September 2015 at 13:59, Vignesh R wrote: > > + * @spi_mtd_mmap_read: some spi-controller hardwares provide memory > > + * mapped interface to communicate with mtd flashes. > > + * For this,

Re: [PATCH 1/5] spi: introduce mmap read support for spi flash devices

2015-09-04 Thread Jagan Teki
On 4 September 2015 at 13:59, Vignesh R wrote: > In addition to providing direct access to SPI bus, some spi controller > hardwares (like ti-qspi) provide special memory mapped port > to accesses SPI flash devices in order to increase read performance. > This means the controller can automatically