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From: Wolfgang Grandegger <wg@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] fsl_i2c: increase I2C timeout values and make them	configurable
Date: Mon, 14 Sep 2009 18:01:23 +0200	[thread overview]
Message-ID: <4AAE68D3.8010900@denx.de> (raw)
In-Reply-To: <4AAE55FA.4070702@freescale.com>

Timur Tabi wrote:
> Wolfgang Grandegger wrote:
> 
>> I did not follow the thread yet, sorry. I implemented AN2819 for Linux
>> (see http://lxr.linux.no/#linux+v2.6.31/drivers/i2c/busses/i2c-mpc.c)
>> some time ago using Timur's table approach. But there is no difference
>> between the table and the algorithm to calculate the value. The table is
>> actually derived from the same algorithm.
> 
> The problem with the table is that it does not allow for flexibility in choosing dfsr.  When I implemented the table code, I did not think that this was a problem, but apparently it is.

What would be the criteria to choose dfsr, especially for a defined bus
frequency.

Wolfgang.

  parent reply	other threads:[~2009-09-14 16:01 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-09  9:19 [U-Boot] fsl_i2c: increase I2C timeout values and make them configurable Joakim Tjernlund
2009-09-09 14:24 ` Timur Tabi
2009-09-09 14:33   ` Joakim Tjernlund
2009-09-10  8:15     ` Joakim Tjernlund
2009-09-10 13:07       ` Timur Tabi
2009-09-10 13:20         ` Joakim Tjernlund
2009-09-10 13:29           ` Timur Tabi
2009-09-10 13:58             ` Joakim Tjernlund
2009-09-10 15:22               ` Timur Tabi
2009-09-10 15:46                 ` Joakim Tjernlund
2009-09-10 15:57                   ` Timur Tabi
2009-09-10 14:57             ` Joakim Tjernlund
2009-09-10 15:26               ` Timur Tabi
2009-09-10 15:53                 ` Joakim Tjernlund
2009-09-10 16:13                   ` Timur Tabi
2009-09-10 16:30                     ` Joakim Tjernlund
2009-09-10 17:13                     ` Joakim Tjernlund
2009-09-11  8:44                       ` Joakim Tjernlund
     [not found]                         ` <4AAA6ACD.9040905@free <4AAE55FA.4070702@freescale.com>
2009-09-11 15:20                         ` Timur Tabi
2009-09-14 13:53                           ` Detlev Zundel
2009-09-14 14:18                             ` Wolfgang Grandegger
2009-09-14 14:40                               ` Timur Tabi
2009-09-14 15:54                                 ` Joakim Tjernlund
2009-09-15 11:53                                   ` Wolfgang Grandegger
2009-09-15 12:24                                     ` Joakim Tjernlund
2009-09-15 18:53                                       ` Joakim Tjernlund
2009-09-14 16:01                                 ` Wolfgang Grandegger [this message]
2009-09-14 16:18                                   ` Joakim Tjernlund

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