• Grant Likely's avatar
    spi: split up spi_new_device() to allow two stage registration. · dc87c98e
    Grant Likely authored
    spi_new_device() allocates and registers an spi device all in one swoop.
    If the driver needs to add extra data to the spi_device before it is
    registered, then this causes problems.  This is needed for OF device
    tree support so that the SPI device tree helper can add a pointer to
    the device node after the device is allocated, but before the device
    is registered.  OF aware SPI devices can then retrieve data out of the
    device node to populate a platform data structure.
    
    This patch splits the allocation and registration portions of code out
    of spi_new_device() and creates two new functions; spi_alloc_device()
    and spi_register_device().  spi_new_device() is modified to use the new
    functions for allocation and registration.  None of the existing users
    of spi_new_device() should be affected by this change.
    
    Drivers using the new API can forego the use of spi_board_info
    structure to describe the device layout and populate data into the
    spi_device structure directly.
    
    This change is in preparation for adding an OF device tree parser to
    generate spi_devices based on data in the device tree.
    Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
    Acked-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
    dc87c98e
spi.c 20 KB