• Justin Chen's avatar
    soc bcm: brcmstb: Add support for S2/S3/S5 suspend states (MIPS) · 0e9b1141
    Justin Chen authored
    This commit adds support for the Broadcom STB S2/S3/S5 suspend
    states on MIPS based SoCs.
    
    This requires quite a lot of code in order to deal with the
    different HW blocks that need to be quiesced during suspend:
    
    - DDR PHY
    - DDR memory controller and arbiter
    - control processor
    
    The final steps of the suspend execute in cache and there is is a little
    bit of assembly code in order to shut down the DDR PHY PLL and then go
    into a wait loop until a wake-up even occurs. Conversely the resume part
    involves waiting for the DDR PHY PLL to come back up and resume
    executions where we left.
    Signed-off-by: default avatarJustin Chen <justinpopo6@gmail.com>
    Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
    0e9b1141
pm-mips.c 10.7 KB