The bootloader can leave the GPIO expander in a state which doesn't have
output drivers enabled so GPIOs will properly work for input but output
operations will have no effect.
To avoid disrupting the boot in case the bootloader left direction and
data registers in an inconsistent state (e.g. pulling SoC's reset to 0)
reconfigure everything as input.
Reviewed-by: Sander Vanheule <sander@svanheule.net>
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
GPIOs > 31 require special handling. This patch fixes both the
initialisation and direction get/set operations.
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-by: Sander Vanheule <sander@svanheule.net>
This fixes the usage of the RTL8231 GPIO extender chip
when used with the RTL839X SoCs. Specifically,
the PHY addresses may be different from 0.
Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
Cppcheck shows self initialization error, which is an obvious bug.
Basing on logic of similar fragment below I assigned to this variable,
value `RTL838X_LED_GLB_CTRL` which I think is proper.
Signed-off-by: Rafał Mikrut <mikrutrafal@protonmail.com>
