| EPGPIO(4) | Device Drivers Manual | EPGPIO(4) | 
epgpio —
epgpio0 at epsoc? addr 0x80840000 size 0xcc intr 59
gpio* at epgpio?
  
  options EPGPIO_PORT_A_MASK=0xXX
  
  options EPGPIO_PORT_B_MASK=0xXX
  
  options EPGPIO_PORT_C_MASK=0xXX
  
  options EPGPIO_PORT_D_MASK=0xXX
  
  options EPGPIO_PORT_E_MASK=0xXX
  
  options EPGPIO_PORT_F_MASK=0xXX
  
  options EPGPIO_PORT_G_MASK=0xXX
  
  options EPGPIO_PORT_H_MASK=0xXX
epgpio driver provides support for the on-board
  General Purpose I/O (GPIO) pins on the Cirrus Logic EP93xx series of
  processors. There are 8 GPIO ports (Ports A though H) each having 8 GPIO pins
  available (note: early revisions of some EP9301 processors have some ports
  with less than eight pins available on each port; check the documentation for
  your specific processor).
The epgpio driver provides a
    gpio(4) controller interface
    and will attach each port as a separate
    gpio(4) device with 8 pins
    available. All pins are bidirectional; when used as inputs they should not
    be driven beyond TTL voltage levels, but for exact details on the electrical
    interface the documentation for the specific evbarm board should be
    consulted.
epgpio driver.
options EPGPIO_PORT_A_MASK=0xXXoptions EPGPIO_PORT_B_MASK=0xXXoptions EPGPIO_PORT_C_MASK=0xXXoptions EPGPIO_PORT_D_MASK=0xXXoptions EPGPIO_PORT_E_MASK=0xXXoptions EPGPIO_PORT_F_MASK=0xXXoptions EPGPIO_PORT_G_MASK=0xXXoptions EPGPIO_PORT_H_MASK=0xXXEach of these options is a bitmask specifying the pins available to the gpio(4) controller for the corresponding port. Pins should be disabled if they are not available or are being used by the hardware for other purposes. The default mask is “0xff” for all ports.
EPGPIO_PORT_A_MASK is set to “0x2c”,
  Port A pins 1, 3, and 5 will appear as
  gpio(4) pins 0, 1, and 2
  respectively.
| February 22, 2009 | NetBSD 10.1 |