Hi,
I have a custom Cape that has a PCF2129 RTC chip.I’ve set a device tree overlay like this:
&{/} {
aliases {
rtc0 = &extrtc;
rtc1 = “/ocp/rtc@44e3e000”;
};
};
&i2c1 {
extrtc: pcf2129@51 {
compatible = “nxp,pcf2129”;
reg = <0x51>;
};
}
and this setup works fine in a BB Green Wireless:
debian@bbgw:~$ dmesg | grep rtc
[ 1.032100] omap_rtc 44e3e000.rtc: already running
[ 1.032598] omap_rtc 44e3e000.rtc: registered as rtc1
[ 1.133896] rtc-pcf2127-i2c 1-0051: rtc core: registered rtc-pcf2127-i2c as rtc0
[ 1.140557] rtc-pcf2127-i2c 1-0051: setting system clock to 2020-09-25 15:27:03 UTC (1601047623)
Nevertheless, trying to use that Cape in a BB Green Gateway (that has another RTC builtin), I’m unable to set the Cape’s RTC as default, because it’s set as rtc2, instead of rtc0 (using the same overlay file):
debian@bbgg:~$ dmesg | grep rtc
[ 1.084958] omap_rtc 44e3e000.rtc: already running
[ 1.085461] omap_rtc 44e3e000.rtc: registered as rtc1
[ 1.152108] rtc-ds1307 0-0068: registered as rtc0
[ 1.187459] rtc-pcf2127-i2c 1-0051: oscillator stop detected, date/time is not reliable
[ 1.187691] rtc-pcf2127-i2c 1-0051: rtc core: registered rtc-pcf2127-i2c as rtc2
[ 1.194605] rtc-ds1307 0-0068: setting system clock to 2020-09-25 17:23:30 UTC (1601054610)
Is there any way that I could setup my Cape’s DTS file in order the Cape’s RTC is used on a BB Green Gateway?
Best regards,
José Gonçalves