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  • Lars-Peter Clausen's avatar
    ASoC: ssm2602: Split SPI and I2C code into different modules · c924dc68
    Lars-Peter Clausen authored
    
    
    There are a few known (minor) problems with having the support code for both I2C
    and SPI in the same module:
        * We need to be extra careful to make sure to not build the driver into the
          kernel if one of the subsystems is build as a module (Currently only I2C
          can be build as a module).
        * The module init path error handling is rather ugly. E.g. what should be
          done if either the SPI or the I2C driver fails to register? Most drivers
          that implement SPI and I2C in the same module currently fallback to
          undefined behavior in that case. Splitting the the driver into two
          modules, one for each bus allows the registration of the other bus driver
          to continue without problems if one of them fails.
    
    This patch splits the ssm2602 driver into 3 modules. One core module that
    implements the device logic, but is independent of the bus method used. And one
    module for SPI and I2C each that registers the drivers and sets up the regmap
    struct for the bus.
    
    While we are at it also cleanup the include section of the ssm2602 driver and
    remove unneeded includes.
    
    Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
    Signed-off-by: default avatarMark Brown <broonie@linaro.org>
    c924dc68