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Reading the DPD_REQ & DPD2_REQ registers returns the previous requests. If we sets the current request bit with the returned value, then other pads will be turned on or off unexpectedly. Signed-off-by: Vince Hsu <vinceh@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>