VCD_STAT
regmap_read(vcd, VCD_STAT, &status);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
ret = regmap_read_poll_timeout(vcd, VCD_STAT, val, !(val & VCD_STAT_BUSY),
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);