ah!!!!! i did not know that.....sounds logical, as after the device is initialized, driver registration will worked, as the latter is just setting up all the pointers in the drivers model hierarchy to get callbacks. thanks for the sharing!!!! On Tue, Sep 29, 2009 at 5:35 AM, Michal Ludvig <mludvig@xxxxxxxxxxxx> wrote: > Hi Peter, > >> On Tue, Sep 22, 2009 at 9:59 AM, Michal Ludvig <mludvig@xxxxxxxxxxxx> wrote: >>> Hi all, >>> >>> I've got a digital IO board sitting on a ISA bus in an industrial x86 >>> computer. I've got a simple driver with ioctl interface for toggling the >>> IO pins Hi and Low and it works fine. >>> >>> Now I'm about to develop a bitbanging SPI driver with the use of >>> drivers/spi/spi_bitbang.c. Unfortunately I don't understand how to glue >>> it with my IO driver, more precisely - how to register a new SPI driver. >>> >>> The other modules in drivers/spi seem to use platform_driver_register() >>> or spi_register_driver() to get their blah_probe() called and then they >>> go from there. However, whatever I tried, my _probe() method never gets >>> called. The module is as simple as this (remove/exit methods omitted >>> from this email): >>> >> >>>From here: >> >> http://www.mjmwired.net/kernel/Documentation/spi/spi-summary >> >> it seemed that SPI's internal is very much board specifics, so perhaps >> u would like let us know the board identity? >> >> http://www.linuxforums.org/forum/linux-kernel/143191-question-about-adding-spi-driver-support.html >> >> This following is a board-specific howto: >> >> http://www.at91.com/samphpbb/viewtopic.php?f=12&t=18280 > > The trick was to register the device prior to registering the driver for > it. In my module_init function I do: > > pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); > [...] > ret = platform_driver_register(&inro_spi_drv); > > and that seems to work and calls my _probe(). > > Michal > > > -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
