gpio: stmpe: Write int status register only when needed
On STMPE801/1801 datasheets, it's mentionned writing in interrupt status register has no effect, bits are cleared when reading. Signed-off-by:Amelie DELAUNAY <amelie.delaunay@st.com> Signed-off-by:
Patrice Chotard <patrice.chotard@st.com> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Lee Jones <lee.jones@linaro.org>
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