tree 65fa9cfd636340f9c9fc97bb3fa76de36c5bf1e2
parent 43e571dee49c134dc1d83b711d537e1b171c4757
author Simon Glass <sjg@chromium.org> 1541542899 -0700
committer Simon Glass <sjg@chromium.org> 1542766462 -0700

misc: Update read() and write() methods to return bytes xfered

At present these functions return 0 on success. For some devices we want
to know how many bytes were transferred. It seems useful to adjust the API
to be more like the POSIX read() and write() functions.

Update these two methods, a test and all users.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>