* an empty stub function will be called.
*/
+void pinmux_init(void); /* overrideable general pinmux setup */
void pin_mux_usb(void); /* overrideable USB pinmux setup */
void pin_mux_spi(void); /* overrideable SPI pinmux setup */
void pin_mux_nand(void); /* overrideable NAND pinmux setup */