From: Sylvain Munaut <tnt@246tNt.com>
To: Andrey Volkov <avolkov@varma-el.com>
Cc: linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: [RFC] MPC5200 Kernel/UBoot PCI problem
Date: Fri, 25 Mar 2005 15:00:28 +0100 [thread overview]
Message-ID: <4244197C.7080804@246tNt.com> (raw)
In-Reply-To: <424404E2.2030602@varma-el.com>
Hi Andrey,
Andrey Volkov wrote:
>>> Try adding some delays in the pci configuration zone access routines
>>> in mpc52xx_pci.c I remember someone needed those but still don't
>>> know why, the manual don't say anything about that.
>>
>>
>> Board started, after I add udelay(7) in read/write config. Really
>> strange.
>
>
> Sylvain, answer was in PCI2.2 specification, not in manual.
>
Indeed good catch ! Never imagined the delay was so long.
It should be possible to use the sched_clock(void) to know if we're
booting since long enough, because just waiting 1 full second is ... long.
Sylvain
next prev parent reply other threads:[~2005-03-25 14:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-21 23:06 [PATCH 0/6] [RFC] Change MPC52xx to platform bus / ppc_sys model Sylvain Munaut
2005-03-21 23:07 ` [PATCH 1/6] ppc32: Remove unnecessary test in MPC52xx reset code Sylvain Munaut
2005-03-21 23:07 ` [PATCH 2/6] ppc32: Remove the OCP system from the Freescale MPC52xx support Sylvain Munaut
2005-03-21 23:08 ` [PATCH 3/6] ppc32: Change constants style in Freescale MPC52xx related code Sylvain Munaut
2005-03-21 23:08 ` [PATCH 4/6] ppc32: Add platform bus / ppc_sys model to Freescale MPC52xx Sylvain Munaut
2005-03-25 15:15 ` Kumar Gala
2005-03-21 23:09 ` [PATCH 5/6] serial: Update mpc52xx_uart.c to use platform bus Sylvain Munaut
2005-03-21 23:09 ` [PATCH 6/6] ppc32: Adds necessary cpu init to use USB on LITE5200 Platform Sylvain Munaut
2005-03-22 1:11 ` [PATCH 0/6] [RFC] Change MPC52xx to platform bus / ppc_sys model Kumar Gala
2005-03-22 7:12 ` Sylvain Munaut
2005-03-24 8:37 ` [RFC] MPC5200 PCI problem Andrey Volkov
2005-03-24 14:34 ` Sylvain Munaut
2005-03-24 18:58 ` Andrey Volkov
2005-03-25 12:32 ` [RFC] MPC5200 Kernel/UBoot " Andrey Volkov
2005-03-25 13:02 ` Dale Farnsworth
2005-03-25 14:00 ` Sylvain Munaut [this message]
2005-03-22 7:04 ` Future of OCP Lawrence E. Bakst
2005-03-22 7:48 ` Eugene Surovegin
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