Found it! Just needed to add another alias in the DTS file: rtc2 = "/ocp/i2c@44e0b000/rtc@68";
and afterwards, my Cape's RTC is used: debian@bbgg:~$ dmesg | grep rtc [ 1.067904] omap_rtc 44e3e000.rtc: already running [ 1.068392] omap_rtc 44e3e000.rtc: registered as rtc1 [ 1.132459] rtc-ds1307 0-0068: registered as rtc2 [ 1.172017] rtc-pcf2127-i2c 1-0051: rtc core: registered rtc-pcf2127-i2c as rtc0 [ 1.178840] rtc-pcf2127-i2c 1-0051: setting system clock to 2020-09-27 07:40:07 UTC (1601192407) A sexta-feira, 25 de setembro de 2020 à(s) 18:42:26 UTC+1, [email protected] escreveu: > 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 > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/e8a6c304-1904-4fa3-b95f-8d4cb8040535n%40googlegroups.com.
