Created attachment 330728 [details] emerge --info From /var/log/genkernel.log: scripts/kconfig/conf --oldconfig Kconfig .config:2860:warning: symbol value 'm' invalid for RTC_LIB .config:2861:warning: symbol value 'm' invalid for RTC_CLASS Output from grep RTC /etc/kernels/kernel-config-x86_64-3.5.7-gentoo: # CONFIG_RTC is not set # CONFIG_GEN_RTC is not set # CONFIG_RTC_CLASS is not set Output from hwclock --debug: hwclock from util-linux 2.21.2 hwclock: Open of /dev/rtc failed: No such file or directory No usable clock interface found. hwclock: Cannot access the Hardware Clock via any known method. Output from ls /dev/rtc* : ls: cannot access /dev/rtc*: No such file or directory If you need the full genkernel.log etc. just ask.
Same bug with (now stable) genkernel-3.4.45: From /var/log/genkernel.log: scripts/kconfig/conf --oldconfig Kconfig .config:2861:warning: symbol value 'm' invalid for RTC_LIB .config:2862:warning: symbol value 'm' invalid for RTC_CLASS Output from grep RTC /etc/kernels/kernel-config-x86_64-3.5.7-gentoo: # CONFIG_RTC is not set # CONFIG_GEN_RTC is not set # CONFIG_RTC_CLASS is not set I did not bother to reboot... I updated the bug's summary.
Change seems to be from 3.4 to 3.5+ kernels. Some or all of these options may need to be set: CONFIG_RTC=y CONFIG_RTC_LIB=y CONFIG_RTC_CLASS=y CONFIG_RTC_HCTOSYS=y CONFIG_RTC_HCTOSYS_DEVICE="rtc0" # CONFIG_RTC_DEBUG is not set # RTC interfaces CONFIG_RTC_INTF_SYSFS=y CONFIG_RTC_INTF_PROC=y CONFIG_RTC_INTF_DEV=y # Platform RTC drivers CONFIG_RTC_DRV_CMOS=y that last one is the most common for x86-family machines. There's a few other options that might be useful, but since I have no use for them I can't tell
The lack of the default missing realtime clock has bitten me twice. I would love to see the realtime clock support by default in genkernel.
*** Bug 472590 has been marked as a duplicate of this bug. ***
Adding info from other bug: Although the shipping kernel-config with genkernel has ~10 of these various RTC hardware drivers marked as modules, the resulting built kernel & initramfs has these things disabled. Here's an excerpt from arch/x86_64/kernel-config: CONFIG_RTC_CLASS=m CONFIG_RTC_DRV_DS1374=m CONFIG_RTC_DRV_MAX6900=m CONFIG_RTC_DRV_M41T80=m CONFIG_RTC_DRV_CMOS=m CONFIG_RTC_DRV_DS1553=m CONFIG_RTC_DRV_DS1742=m CONFIG_RTC_DRV_STK17TA8=m CONFIG_RTC_DRV_M48T86=m CONFIG_RTC_DRV_M48T59=m CONFIG_RTC_DRV_V3020=m The problem is that CONFIG_RTC_CLASS is a boolean, not tristate, so =m is not valid, and so all things depending on RTC_CLASS get dropped from the config. Changing this to CONFIG_RTC_CLASS=y should fix the issue, I have tested this locally with success.
I am grouping this and others together in bug #472470 mainly because of lack of time. If anyone makes a good patch to do this, it will likely be committed ahead of bug #472470's resolution.
Created attachment 350532 [details, diff] genkernel-config-rtc-class.patch
(In reply to Ben Kohler from comment #7) > Created attachment 350532 [details, diff] [details, diff] > genkernel-config-rtc-class.patch You missed the generic-config. Anyway, the patch is now queued for the next release in GIT. http://git.overlays.gentoo.org/gitweb/?p=proj/genkernel.git;a=commit;h=3817a4959faa3d93df9d1340364f77020271d1f2
Results for genkernel-3.4.45.1 and gentoo-sources-3.8.13: From /var/log/genkernel.log: scripts/kconfig/conf --oldconfig Kconfig .config:2863:warning: symbol value 'm' invalid for RTC_LIB Output from grep RTC /etc/kernels/kernel-config-x86_64-3.8.13-gentoo: CONFIG_HPET_EMULATE_RTC=y CONFIG_RTC_LIB=y CONFIG_RTC_CLASS=y CONFIG_RTC_HCTOSYS=y CONFIG_RTC_HCTOSYS_DEVICE="rtc0" # CONFIG_RTC_DEBUG is not set # RTC interfaces CONFIG_RTC_INTF_SYSFS=y CONFIG_RTC_INTF_PROC=y CONFIG_RTC_INTF_DEV=y CONFIG_RTC_INTF_DEV_UIE_EMUL=y # CONFIG_RTC_DRV_TEST is not set # I2C RTC drivers # CONFIG_RTC_DRV_DS1307 is not set CONFIG_RTC_DRV_DS1374=m # CONFIG_RTC_DRV_DS1672 is not set # CONFIG_RTC_DRV_DS3232 is not set CONFIG_RTC_DRV_MAX6900=m # CONFIG_RTC_DRV_RS5C372 is not set # CONFIG_RTC_DRV_ISL1208 is not set # CONFIG_RTC_DRV_ISL12022 is not set # CONFIG_RTC_DRV_X1205 is not set # CONFIG_RTC_DRV_PCF8523 is not set # CONFIG_RTC_DRV_PCF8563 is not set # CONFIG_RTC_DRV_PCF8583 is not set CONFIG_RTC_DRV_M41T80=m CONFIG_RTC_DRV_M41T80_WDT=y # CONFIG_RTC_DRV_BQ32K is not set # CONFIG_RTC_DRV_S35390A is not set # CONFIG_RTC_DRV_FM3130 is not set # CONFIG_RTC_DRV_RX8581 is not set # CONFIG_RTC_DRV_RX8025 is not set # CONFIG_RTC_DRV_EM3027 is not set # CONFIG_RTC_DRV_RV3029C2 is not set # SPI RTC drivers # Platform RTC drivers CONFIG_RTC_DRV_CMOS=m # CONFIG_RTC_DRV_DS1286 is not set # CONFIG_RTC_DRV_DS1511 is not set CONFIG_RTC_DRV_DS1553=m CONFIG_RTC_DRV_DS1742=m CONFIG_RTC_DRV_STK17TA8=m CONFIG_RTC_DRV_M48T86=m # CONFIG_RTC_DRV_M48T35 is not set CONFIG_RTC_DRV_M48T59=m # CONFIG_RTC_DRV_MSM6242 is not set # CONFIG_RTC_DRV_BQ4802 is not set # CONFIG_RTC_DRV_RP5C01 is not set CONFIG_RTC_DRV_V3020=m # CONFIG_RTC_DRV_DS2404 is not set # on-CPU RTC drivers This looks promising but I cannot reboot right now. Maybe someone else can confirm if the generated kernel actually works?
This config could still use some cleanup to silence the warnings, but yes this does boot and work fine, with RTC support. The config has CONFIG_RTC_LIB=m but it ends up getting marked =y anyway because it's "Selected by: RTC_CLASS [=y] && !S390 && !UML" and we do have CONFIG_RTC_CLASS=y in our config.
As far as I am concerned this bug can be closed as fixed. Thanks.
Some things are better late than never. Anyway, this is fixed in genkernel 3.4.48, which I just tagged.
