Hi Jamie, On Sat, 19 Mar 2011 04:11:35 +0800 Jamie Iles <ja...@jamieiles.com> wrote:
> Hi, > > I have a platform with a DesignWare SSI and I'm trying to use the > dw_spi block using a GPIO for the chip select to workaround the > problem of CS changing and the device losing state (we have a SPI > flash attached), and I've found that using interrupt driven > transfers, reading the SPI flash results in very few interrupts from > the controller and a sluggish system (and no data from the flash). > > However, I've found that removing the conditional transfer mode > setting (effectively reverting commit 052dc7c45 [spi/dw_spi: > conditional transfer mode changes]) allows everything to work fine by > keeping the transfer mode to transmit+receive. What version of code are you using? The "cs_control" will be default to NULL if "dw_spi_chip" as the controller data doesn't explicitly set it, and then that piece of code won't be called. Thanks, Feng > > Does anyone have any ideas on the best way to fix this? That code > must have been added for a reason so perhaps it's just a quirk on our > platform, but I'd be keen to know in what ways it's been tested > before - afaict, no other in-tree platforms are using dw_spi with > their own cs_control so it's difficult to know if perhaps these are > all doing polled mode transfers. > > Thanks, > > Jamie > > ------------------------------------------------------------------------------ > Colocation vs. Managed Hosting > A question and answer guide to determining the best fit > for your organization - today and in the future. > http://p.sf.net/sfu/internap-sfd2d > _______________________________________________ > spi-devel-general mailing list > spi-devel-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/spi-devel-general ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
