mpc8xxx_gpio_open_drain_on() / _off() helpers can program GPODR
(open-drain enable) on QorIQ silicon, but they are not called.
The open-drain capability is therefore unreachable from the GPIO uclass.
Adding a set_flags op for the GPIOD_OPEN_DRAIN, plus a get_flags for the
reports of state by reading GPDIR and GPODR back.
For existing callers, it is unchanged: direction_input,
direction_output, get_value, set_value and get_function still drive
the same registers as before. The new ops only become observable when
a caller explicitly asks for the GPIOD_OPEN_DRAIN flag (or queries
flags via the uclass).
Signed-off-by: Vincent Jardin <vjardin@free.fr>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Vincent JardinandPeng Fan
d74dea04e3