definitions and pin control functions for each available multiplex
function.
+config PINCTRL_AT91PIO4
+ bool "AT91 PIO4 pinctrl driver"
+ depends on DM
+ help
+ This option is to enable the AT91 pinctrl driver for AT91 PIO4
+ controller which is available on SAMA5D2 SoC.
+
config PINCTRL_SANDBOX
bool "Sandbox pinctrl driver"
depends on SANDBOX