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    SubjectFW: RTC , ds1307 I2C driver and NTP does not work.
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    switching to kernel/i2c list, see below for details.

    Jocke

    -----Original Message-----
    From: Kumar Gala [mailto:galak@kernel.crashing.org]
    Sent: 17 November 2006 17:57
    To: Joakim Tjernlund
    Cc: linuxppc-dev@ozlabs.org
    Subject: Re: RTC , ds1307 I2C driver and NTP does not work.


    On Nov 17, 2006, at 10:38 AM, Joakim Tjernlund wrote:

    > I get this when I activathte NTP and ntp "sync" the time the I2C HW
    > clock.

    You may be better off posting this to lkml and copy the i2c list (and
    rtc if one exists). Since its more a driver issue than anything
    really ppc specific. Clearly we are doing schedules() in mpc_xfer()
    and maybe we shouldn't be.

    - kumar

    > BUG: scheduling while atomic: swapper/0x00010000/0
    > Call Trace:^M
    > [C0245C80] [C000860C] show_stack+0x48/0x194 (unreliable)
    > [C0245CB0] [C01BEFF4] schedule+0x5d4/0x618
    > [C0245CF0] [C01BF9C8] schedule_timeout+0x70/0xd0
    > [C0245D30] [C014416C] i2c_wait+0x164/0x1d8
    > [C0245D80] [C0144490] mpc_xfer+0x2b0/0x3a8
    > [C0245DD0] [C01423E8] i2c_transfer+0x58/0x7c
    > [C0245DF0] [C0141124] ds1307_set_time+0x1bc/0x234
    > [C0245E00] [C013F82C] rtc_set_time+0xb0/0xb8^M
    > [C0245E20] [C000BFC4] set_rtc_class_time+0x34/0x58
    > [C0245E40] [C000C8D0] timer_interrupt+0x5a0/0x5fc
    > [C0245EE0] [C000F7B0] ret_from_except+0x0/0x14
    > --- Exception: 901 at cpu_idle+0xc8/0xf0
    > LR = cpu_idle+0xec/0xf0
    > [C0245FC0] [C000388C] rest_init+0x28/0x38
    > [C0245FD0] [C01F36E0] start_kernel+0x1d8/0x228
    > [C0245FF0] [00003438] 0x3438
    >
    > I have activated RTC CLASS and have this in my board file:
    > #ifdef CONFIG_RTC_CLASS
    > late_initcall(rtc_class_hookup);
    > #endif
    >
    > kernel 2.6.19-rc5
    >
    > Jocke
    >
    > _______________________________________________
    > Linuxppc-dev mailing list
    > Linuxppc-dev@ozlabs.org
    > https://ozlabs.org/mailman/listinfo/linuxppc-dev



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