CX23888_IR_RXCLK_REG
cx23888_ir_write4(dev, CX23888_IR_RXCLK_REG, *divider);
cx23888_ir_write4(dev, CX23888_IR_RXCLK_REG, *divider);
cx23888_ir_write4(dev, CX23888_IR_RXCLK_REG, RXCLK_RCD);
u32 rxclk = cx23888_ir_read4(dev, CX23888_IR_RXCLK_REG) & RXCLK_RCD;