Actually , I have write a driver based on iMX6 and V850 , implement via tty driver .
And suggest you follow kernel driver ifx6x60.c Regards 2014-07-30 3:13 GMT+08:00 John Syn <[email protected]>: > > From: <[email protected]> > Reply-To: "[email protected]" <[email protected]> > Date: Tuesday, July 29, 2014 at 7:33 AM > To: "[email protected]" <[email protected]> > Subject: Re: [beagleboard] Using SPI in a kernel module > > Thanks, John. > > I Iooked at kernel/drivers/iio/dac/ad/5064.c > > There's the following struct which is passed to *spi_register_driver()*: > static struct spi_driver ad5064_spi_driver = { > .driver = { > .name = "ad5064", > .owner = THIS_MODULE, > }, > .probe = ad5064_spi_probe, > .remove = ad5064_spi_remove, > .id_table = ad5064_spi_ids, > }; > > I compiled the module and loaded it but the probe function never gets > called. Why? > > From this I can see that this driver isn’t DeviceTree enabled so I’m not > sure which SPI interface it is using. Either you can add the devicetree > support to this driver so that you can specify which SPI interface to use, > or e-mail the Linux-IIO mailing list and see how to use this driver. > > Regards, > John > > > > > Am Montag, 28. Juli 2014 18:09:34 UTC+2 schrieb john3909: >> >> >> From: Nils <[email protected]> >> Reply-To: "[email protected]" <[email protected]> >> Date: Monday, July 28, 2014 at 7:00 AM >> To: "[email protected]" <[email protected]> >> Subject: [beagleboard] Using SPI in a kernel module >> >> Hello, >> >> I'm currently working on a kernel module which needs to communicate via >> SPI to an external microchip. >> >> I used the cape manager to enable SPI. The device is accessible through >> /dev/spidev1.0. >> But since it's a kernel module, I guess it's not recommended to access >> files via sys_open()? >> >> Another approach I found would be adding a struct to >> *arch/arm/mach-omap2/board-am335xevm.c >> *and then use *spi_register_driver()* in my kernel module. But in my >> kernel sources (3.8.13) this file doesn't exist. >> >> There is no board files since the introduction of device tree. >> >> >> >> What would be the right way to use SPI in my kernel module? >> >> Look at examples in /drivers/staging/iio or /drivers/iio >> >> There are plenty of examples of using SPI calls in a kernel module. >> >> Use the power of GIT to find what you are looking for. In the Kernel >> source do the following: >> >> git grep spi_sync_transfer >> >> Regards, >> John >> >> >> >> Regards, >> Nils >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
