• Roger Quadros's avatar
    ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on · e120fb45
    Roger Quadros authored
    After clarification from the hardware team it was found that
    this 1.8V PHY supply can't be switched OFF when SoC is Active.
    
    Since the PHY IPs don't contain isolation logic built in the design to
    allow the power rail to be switched off, there is a very high risk
    of IP reliability and additional leakage paths which can result in
    additional power consumption.
    
    The only scenario where this rail can be switched off is part of Power on
    reset sequencing, but it needs to be kept always-on during operation.
    
    This patch is required for proper functionality of USB, SATA
    and PCIe on DRA7-evm.
    
    CC: Rajendra Nayak <rnayak@ti.com>
    CC: Tero Kristo <t-kristo@ti.com>
    Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    e120fb45
dra7-evm.dts 11.9 KB