You can upload data into GEO (http://www.ncbi.nlm.nih.gov/geo/) database. If the platform is already defined there you can just upload your data, otherwise you need to upload the platform design first.
I assume you are talking about NGS data. If you intend to upload your complete sequence data to allow potential meta-analysis, you may deposit your data into the SRA database of PubMed (http://www.ncbi.nlm.nih.gov/sra/).