On Sun, Jan 16, 2011 at 11:22 PM, Thomas Chou <[email protected]> wrote: > On 01/17/2011 01:59 PM, Stephen Rothwell wrote: >>> >>> +/* >>> + * struct altera_spi_platform_data - platform data of the Altera SPI >>> + * @interrupt: use intrrupt driven data transfer. >>> + */ >>> +struct altera_spi_platform_data { >>> + int interrupt; >>> +}; >> >> Is there some reason that this struct definition cannot just be placed >> in spi_altera.c and so save a whole extra file (and its inclusion)? >> > > Hi Stephen, > > It is needed for board configuration file to attach this platform data, > which is used to choose between interrupt driven data transfer or polling > method. The data transfer rate is usually faster for polling, as interrupt > overhead is higher.
In this case, that decision could simply be made based on whether or not the device has an irq resource. No irq == polled mode. g. ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
