RX_ENABLE
reg |= RX_ENABLE;
reg &= ~(RX_ENABLE);
val = RX_ENABLE;
enable = RX_ENABLE;
writel(reg_val_GCR | RX_ENABLE, msp->registers + MSP_GCR);
writel(reg_val_GCR & ~RX_ENABLE, msp->registers + MSP_GCR);
(~(RX_ENABLE | LOOPBACK_MASK))),
enable_bit = RX_ENABLE;