Hi Peter,
> On Tue, Sep 22, 2009 at 9:59 AM, Michal Ludvig <[email protected]> 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
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