pinctrl: gpio: sx150x: add Semtech SX150x I2C GPIO expander and pinctrl driver

 implement a driver to use semtech pinctrl and
 gpio expander, this driver is adapted from a
 existent linux driver that is written by
 Gregory Bean <gbean@codeaurora.org>.

Signed-off-by: Anis Chali <chalianis1@gmail.com>
3 files changed