On Tue, Dec 06, 2016 at 09:12:24PM -0800, Joel Fernandes wrote: > On Tue, Dec 6, 2016 at 11:42 AM, Ran Shalit <ranshalit@xxxxxxxxx> wrote: > > Hello, > > > > I have spi device which is registered using spi_register_board_info(), > > and I would like to get a pointer to this device in some other kernel module. > > > > Is there a simple way to get a pointer to pointer to a device , so > > that we can use it from other module ? (something like i2c_get_adapter > > for i2c) > > Find out what's the SPI bus number (for the master) and the chip > select on that SPI master (for the SPI device) > > Then you can use bus_for_each_device on spi_bus_type and find the > spi_device you're looking for. See the following code for an example > of how to use bus_for_each_device: > > http://lxr.free-electrons.com/source/drivers/spi/spi.c#L524 > > In your check function, just make sure your spi->master->bus_num is > the bus you want and the spi->chip_select is the chip select > corresponding to the device you want. If both these conditions are > satisfied, there you have your spi_device. Eeek, no, please never do that, use the proper spi apis to get your needed device. They are there somewhere, using a "raw" bus_for_each_device is never the answer unless you are a bus and iterating over your own device list. thanks, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
