CX25840_IR_RXCLK_REG
rxclk = cx25840_read4(c, CX25840_IR_RXCLK_REG) & RXCLK_RCD;
cx25840_write4(c, CX25840_IR_RXCLK_REG, *divider);
cx25840_write4(c, CX25840_IR_RXCLK_REG, *divider);
cx25840_write4(c, CX25840_IR_RXCLK_REG, RXCLK_RCD);