Make driver use u64 variables and functions to be sure that
it will support dates after year 2038.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>
Acked-by: NPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>