On Wed, Oct 06, 2010 at 11:05:27AM +0100, Andre B. Oliveira wrote: > Hello, again! :-) > And here is a driver for the Microchip MCP2515 SPI controller: > http://clientes.netvisao.pt/anbadeol/can.html > > This driver is unrelated to the mcp251x driver in the stable Linux. It > was written from scratch to use the asynchronous SPI API directly in > order to minimise SPI transactions latency. I think it can not get > much better than this. The 100+ microseconds latency you see in the > oscilloscope screenshots are caused by the PXA SPI controller driver, > not this mcp2515 driver. To eliminate those, one would also have to > reimplement the SPI controller drivers not to use workqueues and such. > I'm not doing that! :-) > > Anyway, I hope you like this new mcp2515 driver, and I hope it works > for you too!
I'd think there is quite some interest in this driver. Please post it as you posted the other one, too. -- Pengutronix e.K. | Wolfram Sang | Industrial Linux Solutions | http://www.pengutronix.de/ |
signature.asc
Description: Digital signature
_______________________________________________ Socketcan-core mailing list [email protected] https://lists.berlios.de/mailman/listinfo/socketcan-core
