How to submit a patch to upsream

//git format patch
git format-patch --subject-prefix="U-Boot][PATCH Vx" --stat -p -n -

git format-patch --subject-prefix="PATCH v2" --cover-letter --stat -p -n10

git format-patch -M (rename file)

// u-boot
git send-email --no-chain-reply-to --no-signed-off-by-cc --quiet --smtp-server xxxxx(smpt address) --suppress-cc=all --confirm=always  --to u-boot@lists.denx.de --cc sbabic@denx.de

//USB
git send-email --no-chain-reply-to --no-signed-off-by-cc --suppress-cc all -quiet --smtp-server xxxxx(smpt address)  --to balbi@ti.com  --to gregkh@suse.de --to stern@rowland.harvard.edu --cc linux-usb@vger.kernel.org 

If it is the bug, you can add stable@kernel.org

--cc stable@kernel.org

//For v2 patch please add below at  Signed-off-by

    Signed-off-by: Peter Chen <hzpeterchen@gmail.com>

    ---
    Changes for v2:
        -  what changes