• Stephen Warren's avatar
    regmap: implement register striding · f01ee60f
    Stephen Warren authored
    regmap_config.reg_stride is introduced. All extant register addresses
    are a multiple of this value. Users of serial-oriented regmap busses will
    typically set this to 1. Users of the MMIO regmap bus will typically set
    this based on the value size of their registers, in bytes, so 4 for a
    32-bit register.
    
    Throughout the regmap code, actual register addresses are used. Wherever
    the register address is used to index some array of values, the address
    is divided by the stride to determine the index, or vice-versa. Error-
    checking is added to all entry-points for register address data to ensure
    that register addresses actually satisfy the specified stride. The MMIO
    bus ensures that the specified stride is large enough for the register
    size.
    Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
    Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
    f01ee60f
regcache-rbtree.c 10.9 KB