List of onboard Peripherals and associated Drivers
32MB Flash
Memory Technology Device (MTD)
- drivers/mtd
8Kbits Serial EEPROM
I2C EEPROMs from most vendors
- drivers/misc/eeprom/at24.c
2 Port 10/100/100 Ethernet Switch
Cavium CNS3xxx Ethernet support
- drivers/net/cns3xxx_eth.c
RTC
Dallas/Maxim? DS1672
- drivers/rtc/rtc-ds1672.c
HWMON
Gateworks System Peripheral
- drivers/hwmon/gsp.c
USB
Cavium CNS3XXX EHCI Module
- drivers/usb/host/ehci-cns3xxx.c
- drivers/usb/host/ohci-cns3xxx.c
Cavium CNS3XXX OTG Module
- drivers/usb/otg
GPS
- Uses a builtin serial port
GPIO
Emulates a TI 16-bit i2c Digital-IO: pca9555:
J9.1 - gpio108 J9.3 - gpio109 J9.5 - gpio110 J9.7 - gpio111 J9.9 - gpio112
Modern kernels use gpiolib to access gpio from userspace. By default these are not exported in the OpenWrt kernels, but you can do so in userspace such as:
echo 108 > /sys/class/gpio/export echo 109 > /sys/class/gpio/export echo 110 > /sys/class/gpio/export echo 111 > /sys/class/gpio/export echo 112 > /sys/class/gpio/export echo in > /sys/class/gpio/gpio108/direction echo in > /sys/class/gpio/gpio109/direction echo in > /sys/class/gpio/gpio110/direction echo in > /sys/class/gpio/gpio111/direction echo in > /sys/class/gpio/gpio112/direction
to see the value of an input/output:
cat /sys/class/gpio/gpio112/value
to set the value of an output
echo out > /sys/class/gpio/gpio122/direction ;# set as output echo 1 >/sys/class/gpio/gpio112/value ;# set hi echo 0 >/sys/class/gpio/gpio112/value ;# set low
to see all gpio status (assuming you have debugfs mounted):
cat /sys/kernel/debug/gpio </pre
Last modified 16 months ago
Last modified on 10/23/2017 09:37:41 PM