|Summary:||sys-kernel/genkernel-22.214.171.124: no rtc support with newer kernels|
|Product:||Gentoo Hosted Projects||Reporter:||sf <sf-gentoo>|
|Component:||genkernel||Assignee:||Gentoo Genkernel Maintainers <genkernel>|
|Severity:||normal||CC:||bkohler, patrick, tobias.pal|
|Priority:||Normal||Keywords:||Bug, InVCS, PATCH|
|Package list:||Runtime testing required:||---|
|Bug Depends on:||472470|
Description sf 2012-11-27 12:49:19 UTC
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.
Comment 1 sf 2012-12-13 12:00:46 UTC
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.
Comment 2 Patrick Lauer 2013-02-20 03:36:21 UTC
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
Comment 3 hammackj 2013-03-02 15:47:13 UTC
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.
Comment 4 Ben Kohler 2013-06-08 16:00:18 UTC
*** Bug 472590 has been marked as a duplicate of this bug. ***
Comment 5 Ben Kohler 2013-06-08 16:01:54 UTC
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.
Comment 6 Richard Yao 2013-06-09 15:32:32 UTC
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.
Comment 7 Ben Kohler 2013-06-09 15:38:35 UTC
Created attachment 350532 [details, diff] genkernel-config-rtc-class.patch
Comment 8 Richard Yao 2013-06-09 16:01:24 UTC
(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
Comment 9 sf 2013-06-20 11:00:15 UTC
Results for genkernel-126.96.36.199 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?
Comment 10 Ben Kohler 2013-06-20 15:38:07 UTC
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.
Comment 11 sf 2013-09-04 12:52:02 UTC
As far as I am concerned this bug can be closed as fixed. Thanks.
Comment 12 Richard Yao 2014-02-27 23:08:17 UTC
Some things are better late than never. Anyway, this is fixed in genkernel 3.4.48, which I just tagged.