• Peter Ujfalusi's avatar
    CLK: TI: Driver for DRA7 ATL (Audio Tracking Logic) · 9ac33b0c
    Peter Ujfalusi authored
    Audio Tracking Logic is designed to be used by HD Radio applications to
    synchronize the audio output clocks to the baseband clock. ATL can be also
    used to track errors between two reference clocks (BWS, AWS) and generate a modulated
    clock output which averages to some desired frequency.
    In essence ATL is generating a clock to be used by an audio codec and also
    to be used by the SoC as MCLK.
    
    To be able to integrate the ATL provided clocks to the clock tree we need
    two types of DT binding:
    - DT clock nodes to represent the ATL clocks towards the CCF
    - binding for the ATL IP itself which is going to handle the hw
      configuration
    
    The reason for this type of setup is that ATL itself is a separate device
    in the SoC, it has it's own address space and clock domain. Other IPs can
    use the ATL generated clock as their functional clock (McASPs for example)
    and external components like audio codecs can also use the very same clock
    as their MCLK.
    
    The ATL IP in DRA7 contains 4 ATL instences.
    Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
    Signed-off-by: default avatarTero Kristo <t-kristo@ti.com>
    9ac33b0c
clk-dra7-atl.c 7.42 KB