Bug#785419: linux-image-4.0.0-1-armmp: with 2 RTC devices -- need way to chose which one sets system clock on boot
Package: src:linux
Version: 4.0.2-1
Severity: normal
Tags: upstream
My cubox-i4pro armhf device has two real-time-clocks. One, snvs, is not battery backed,
hence is not useful for setting the system clock on boot after a power failure.
The other, pcf8523, does have battery backup.
Unfortunately, the snvs is recognzed first, so it become /dev/rtc0 (the pcf8523 becomes /dev/rtc1)
and the kernel at boot time uses /dev/rtc0 by default to set the system time from.
There does not seem to be any way to over-ride this. There's code in /etc/default/hwclock
that would do part of the work in a sysvinit setup, but it seems to be ignored under systemd.
In googling about, I stumbled across a proposed patch that would add a kernel command line
parameter, "hctosys=rtc<#>' that would over-ride the default, but it seems not
to have ever been implemented ( http://lkml.iu.edu/hypermail/linux/kernel/1407.0/03989.html )
Presumably, there is systemd magic that could do the same thing as was available under
sysvinit. Is there anybody out there with enough systemd foo to tell me how to do that?
Other ways to attack this problem may involve something with udev rules, but I'm not savvy
enough to figure that out for myself, either.
Personally, I kind of like the kernel command line parameter, but others may have other
ideas.
Thanks for your consideration!
Rick
-- Package-specific info:
** Version:
Linux version 4.0.0-1-armmp (debian-kernel@lists.debian.org) (gcc version 4.9.2 (Debian 4.9.2-16) ) #1 SMP Debian 4.0.2-1 (2015-05-11)
** Command line:
hctosys=rtc1 console=ttymxc0,115200 quiet
** Not tainted
** extracts from dmesg
rbthomas@cube:~$ dmesg | egrep 'rtc|clock' | grep -v crtc
[ 0.000000] Kernel command line: hctosys=rtc1 console=ttymxc0,115200 quiet
[ 0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[ 0.000007] sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655765682ns
[ 0.114449] PTP clock support registered
[ 0.115986] Switched to clocksource mxc_timer1
[ 1.303721] snvs_rtc 20cc034.snvs-rtc-lp: rtc core: registered 20cc034.snvs-rtc-lp as rtc0
[ 1.311100] snvs_rtc 20cc034.snvs-rtc-lp: setting system clock to 2015-05-15 23:43:56 UTC (1431733436)
[ 5.634623] rtc-pcf8523 2-0068: rtc core: registered rtc-pcf8523 as rtc1
** Kernel log:
[ 7.857815] usb-storage 1-1.4.2:1.0: USB Mass Storage device detected
[ 7.858173] scsi host6: usb-storage 1-1.4.2:1.0
[ 7.865466] scsi 1:0:0:0: Direct-Access Generic STORAGE DEVICE 0272 PQ: 0 ANSI: 0
[ 7.866779] sd 1:0:0:0: Attached scsi generic sg1 type 0
[ 7.873156] scsi 2:0:0:0: Direct-Access SanDisk Cruzer Fit 1.27 PQ: 0 ANSI: 6
[ 7.873790] scsi 3:0:0:0: Direct-Access SanDisk Cruzer Fit 1.27 PQ: 0 ANSI: 6
[ 7.874380] sd 2:0:0:0: Attached scsi generic sg2 type 0
[ 7.875645] sd 3:0:0:0: Attached scsi generic sg3 type 0
[ 7.876241] sd 2:0:0:0: [sdc] 61056064 512-byte logical blocks: (31.2 GB/29.1 GiB)
[ 7.876886] sd 3:0:0:0: [sdd] 61056064 512-byte logical blocks: (31.2 GB/29.1 GiB)
[ 7.877015] sd 2:0:0:0: [sdc] Write Protect is off
[ 7.877033] sd 2:0:0:0: [sdc] Mode Sense: 43 00 00 00
[ 7.877632] sd 3:0:0:0: [sdd] Write Protect is off
[ 7.877651] sd 3:0:0:0: [sdd] Mode Sense: 43 00 00 00
[ 7.877881] sd 2:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 7.878766] sd 3:0:0:0: [sdd] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 7.892636] sd 3:0:0:0: [sdd] Attached SCSI removable disk
[ 7.896288] sd 2:0:0:0: [sdc] Attached SCSI removable disk
[ 7.927904] md: bind<sdd>
[ 7.938387] md: bind<sdc>
[ 8.068936] scsi 4:0:0:0: Direct-Access SanDisk Cruzer Fit 1.27 PQ: 0 ANSI: 6
[ 8.070109] sd 4:0:0:0: Attached scsi generic sg4 type 0
[ 8.070636] sd 4:0:0:0: [sde] 61056064 512-byte logical blocks: (31.2 GB/29.1 GiB)
[ 8.071369] sd 4:0:0:0: [sde] Write Protect is off
[ 8.071386] sd 4:0:0:0: [sde] Mode Sense: 43 00 00 00
[ 8.072145] sd 4:0:0:0: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 8.082631] sd 4:0:0:0: [sde] Attached SCSI removable disk
[ 8.119009] md: bind<sde>
[ 8.122659] sd 1:0:0:0: [sdb] 122519552 512-byte logical blocks: (62.7 GB/58.4 GiB)
[ 8.123764] sd 1:0:0:0: [sdb] Write Protect is off
[ 8.123780] sd 1:0:0:0: [sdb] Mode Sense: 0b 00 00 08
[ 8.125874] sd 1:0:0:0: [sdb] No Caching mode page found
[ 8.125892] sd 1:0:0:0: [sdb] Assuming drive cache: write through
[ 8.136889] sdb: sdb1 sdb2 sdb3 < sdb5 sdb6 sdb7 >
[ 8.142922] sd 1:0:0:0: [sdb] Attached SCSI removable disk
[ 8.661076] scsi 5:0:0:0: Direct-Access SanDisk Cruzer Fit 1.27 PQ: 0 ANSI: 6
[ 8.662322] sd 5:0:0:0: Attached scsi generic sg5 type 0
[ 8.663763] sd 5:0:0:0: [sdf] 61056064 512-byte logical blocks: (31.2 GB/29.1 GiB)
[ 8.665357] sd 5:0:0:0: [sdf] Write Protect is off
[ 8.665376] sd 5:0:0:0: [sdf] Mode Sense: 43 00 00 00
[ 8.667127] sd 5:0:0:0: [sdf] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 8.675501] sd 5:0:0:0: [sdf] Attached SCSI removable disk
[ 8.713134] md: bind<sdf>
[ 8.857145] scsi 6:0:0:0: Direct-Access SanDisk Cruzer Fit 1.27 PQ: 0 ANSI: 6
[ 8.858854] sd 6:0:0:0: Attached scsi generic sg6 type 0
[ 8.867907] sd 6:0:0:0: [sdg] 61056064 512-byte logical blocks: (31.2 GB/29.1 GiB)
[ 8.869378] sd 6:0:0:0: [sdg] Write Protect is off
[ 8.869396] sd 6:0:0:0: [sdg] Mode Sense: 43 00 00 00
[ 8.870125] sd 6:0:0:0: [sdg] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 8.879879] sd 6:0:0:0: [sdg] Attached SCSI removable disk
[ 8.915640] md: bind<sdg>
[ 9.076560] raid6: int32x1 106 MB/s
[ 9.144345] raid6: int32x2 129 MB/s
[ 9.187471] EXT4-fs (sdb2): mounted filesystem with ordered data mode. Opts: (null)
[ 9.212032] raid6: int32x4 152 MB/s
[ 9.280348] raid6: int32x8 166 MB/s
[ 9.280364] raid6: using algorithm int32x8 (166 MB/s)
[ 9.280371] raid6: using intx1 recovery algorithm
[ 9.283187] EXT4-fs (sdb1): mounting ext2 file system using the ext4 subsystem
[ 9.286873] EXT4-fs (sdb6): mounted filesystem with ordered data mode. Opts: (null)
[ 9.294210] async_tx: api initialized (async)
[ 9.302629] xor: measuring software checksum speed
[ 9.305068] EXT4-fs (sdb1): mounted filesystem without journal. Opts: (null)
[ 9.339994] arm4regs : 1341.000 MB/sec
[ 9.377678] EXT4-fs (sdb7): mounted filesystem with ordered data mode. Opts: (null)
[ 9.380018] 8regs : 959.000 MB/sec
[ 9.419992] 32regs : 908.000 MB/sec
[ 9.420007] xor: using function: arm4regs (1341.000 MB/sec)
[ 9.446535] md: raid6 personality registered for level 6
[ 9.446551] md: raid5 personality registered for level 5
[ 9.446558] md: raid4 personality registered for level 4
[ 9.448432] md/raid:md127: device sdg operational as raid disk 4
[ 9.448447] md/raid:md127: device sdf operational as raid disk 3
[ 9.448458] md/raid:md127: device sde operational as raid disk 2
[ 9.448466] md/raid:md127: device sdc operational as raid disk 0
[ 9.448475] md/raid:md127: device sdd operational as raid disk 1
[ 9.450081] md/raid:md127: allocated 0kB
[ 9.450212] md/raid:md127: raid level 6 active with 5 out of 5 devices, algorithm 2
[ 9.450223] RAID conf printout:
[ 9.450230] --- level:6 rd:5 wd:5
[ 9.450238] disk 0, o:1, dev:sdc
[ 9.450246] disk 1, o:1, dev:sdd
[ 9.450254] disk 2, o:1, dev:sde
[ 9.450261] disk 3, o:1, dev:sdf
[ 9.450269] disk 4, o:1, dev:sdg
[ 9.450474] md127: detected capacity change from 0 to 93731684352
[ 38.010920] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
[ 68.533703] systemd-journald[163]: Received request to flush runtime journal from PID 1
[ 68.940854] fec 2188000.ethernet eth0: Freescale FEC PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=2188000.ethernet:00, irq=-1)
[ 68.941067] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 69.760671] RPC: Registered named UNIX socket transport module.
[ 69.760694] RPC: Registered udp transport module.
[ 69.760719] RPC: Registered tcp transport module.
[ 69.760742] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 69.789121] FS-Cache: Loaded
[ 69.840280] FS-Cache: Netfs 'nfs' registered for caching
[ 69.911176] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[ 72.940435] fec 2188000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 72.940469] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 74.433955] warning: process `colord-sane' used the deprecated sysctl system call with 8.1.2.
** Model information
Hardware : Freescale i.MX6 Quad/DualLite (Device Tree)
Revision : 0000
** Loaded modules:
nfsd
auth_rpcgss
oid_registry
nfs_acl
nfs
lockd
grace
fscache
sunrpc
raid456
async_raid6_recov
async_memcpy
async_pq
async_xor
xor
async_tx
raid6_pq
usb_storage
dw_hdmi_imx
snd_soc_fsl_spdif
imx_pcm_dma
snd_soc_imx_spdif
snd_soc_core
dw_hdmi
imx_ipuv3_crtc
imxdrm
snd_compress
drm_kms_helper
evdev
snd_pcm_dmaengine
ir_sharp_decoder
ir_sony_decoder
drm
snd_pcm
ci_hdrc_imx
pwm_imx
ci_hdrc
usbmisc_imx
imx2_wdt
ir_lirc_codec
ir_mce_kbd_decoder
ir_xmp_decoder
lirc_dev
ir_sanyo_decoder
ir_jvc_decoder
ir_rc6_decoder
ir_nec_decoder
ir_rc5_decoder
imx_ipu_v3
gpio_ir_recv
ehci_hcd
i2c_imx
snd_timer
snd
soundcore
leds_pwm
md_mod
autofs4
ext4
crc16
mbcache
jbd2
dm_mod
sg
sd_mod
ahci_imx
libahci_platform
libahci
libata
sdhci_esdhc_imx
scsi_mod
sdhci_pltfm
sdhci
phy_mxs_usb
at803x
** PCI devices:
** USB devices:
Bus 002 Device 002: ID 05e3:0736 Genesys Logic, Inc. microSD Reader/Writer
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 008: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 001 Device 007: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 001 Device 006: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 001 Device 005: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 001 Device 004: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 001 Device 003: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 001 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
-- System Information:
Debian Release: stretch/sid
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'unstable'), (500, 'stable')
Architecture: armhf (armv7l)
Kernel: Linux 4.0.0-1-armmp (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages linux-image-4.0.0-1-armmp depends on:
ii debconf [debconf-2.0] 1.5.56
ii initramfs-tools [linux-initramfs-tool] 0.120
ii kmod 20-1
ii linux-base 3.5
Versions of packages linux-image-4.0.0-1-armmp recommends:
ii firmware-linux-free 3.3
ii irqbalance 1.0.6-3
Versions of packages linux-image-4.0.0-1-armmp suggests:
pn debian-kernel-handbook <none>
pn fdutils <none>
pn linux-doc-4.0 <none>
Versions of packages linux-image-4.0.0-1-armmp is related to:
pn firmware-atheros <none>
pn firmware-bnx2 <none>
pn firmware-bnx2x <none>
pn firmware-brcm80211 <none>
pn firmware-intelwimax <none>
pn firmware-ipw2x00 <none>
pn firmware-ivtv <none>
pn firmware-iwlwifi <none>
pn firmware-libertas <none>
ii firmware-linux 0.44
ii firmware-linux-nonfree 0.44
pn firmware-myricom <none>
pn firmware-netxen <none>
pn firmware-qlogic <none>
pn firmware-ralink <none>
pn firmware-realtek <none>
pn xen-hypervisor <none>
-- debconf information:
linux-image-4.0.0-1-armmp/prerm/removing-running-kernel-4.0.0-1-armmp: true
linux-image-4.0.0-1-armmp/postinst/mips-initrd-4.0.0-1-armmp:
linux-image-4.0.0-1-armmp/postinst/depmod-error-initrd-4.0.0-1-armmp: false
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