Hello Forum,
please excuse my bad English.
I try setting up a stratum1-server. Based on GPS.
For this I use the Banana Pi with kernel 4.6.2 and the Adafruit GPS.
The GPS is connected to GPIO J12 and works. RX/TX is not the problem. The problem is the right pin for the PPS-signal.
dmesg|grep pps*
[ 0.001207] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[ 0.067281] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 4
[ 3.260009] pps_core: LinuxPPS API ver. 1 registered
[ 3.260018] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 3.260048] PTP clock support registered
[ 3.322715] simple-framebuffer 7fe79000.framebuffer: framebuffer at 0x7fe79000, 0x178e00 bytes, mapped to 0xf0900000
[ 3.987818] 8021q: 802.1Q VLAN Support v1.8
[ 4.023716] mmc0: host does not support reading read-only switch, assuming write-enable
[ 4.122304] No HW DMA feature register supported
[ 4.122317] TX Checksum insertion supported
[ 4.298551] usb_phy_generic.0.auto supply vcc not found, using dummy regulator
[ 6.863909] pps_gpio: unknown parameter 'gpio_pin' ignored
[ 7.002898] systemd[1]: Starting Apply Kernel Variables...
[ 7.989677] sun4i-codec 1c22c00.codec: Codec <-> 1c22c00.codec mapping ok
lsmod | grep pps
pps_gpio 2655 0
My question: How do I specify that (maybe) PIN 18 is for PPS.
I tried /etc/modprobe.d/pps-gpio.conf with
options pps-gpio gpio_pin=18
But in dmesg appears
[ 6.863909] pps_gpio: unknown parameter 'gpio_pin' ignored
Probably it is not a major problem, but I'm stuck at this point.
Greetings from Berlin
