REG_MSC_CMD_OR_OFFSET
sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg + 1, 2);
sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg, 3);
sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]);