tree 02f9d1e09140e87dac417bbbe27932c817723335
parent fb8c86911052ccd4011392f78a24991c55c0d172
author Amelie Delaunay <amelie.delaunay@st.com> 1557392329 +0200
committer Lee Jones <lee.jones@linaro.org> 1557472883 +0100

mfd: Add ST Multi-Function eXpander (STMFX) core driver

STMicroelectronics Multi-Function eXpander (STMFX) is a slave controller
using I2C for communication with the main MCU. Main features are:
- 16 fast GPIOs individually configurable in input/output
- 8 alternate GPIOs individually configurable in input/output when other
STMFX functions are not used
- Main MCU IDD measurement
- Resistive touchscreen controller

Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>