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| author | wdenk <wdenk> | 2003-04-05 00:53:31 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2003-04-05 00:53:31 +0000 |
| commit | 3e38691e8f7aa0d9b498d76c7279ddec6e4946f3 (patch) | |
| tree | bec2e661298847dc5bcf9335ef31259686e882e1 /doc/I2C_Edge_Conditions | |
| parent | 36c05a80ecbe3997abd9aa628a68dd6c0bacf681 (diff) | |
| download | u-boot-imx-3e38691e8f7aa0d9b498d76c7279ddec6e4946f3.zip u-boot-imx-3e38691e8f7aa0d9b498d76c7279ddec6e4946f3.tar.gz u-boot-imx-3e38691e8f7aa0d9b498d76c7279ddec6e4946f3.tar.bz2 | |
* Patch by Arun Dharankar, 4 Apr 2003:
Add IDMA example code (tested on 8260 only)
* Add support for Purple Board (MIPS64 5Kc)
* Add support for MIPS64 5Kc CPUs
* Fix missing setting of "loadaddr" and "bootfile" on ARM and MIPS
* Patch by Denis Peter, 04 Apr 2003:
- update MIP405-4 board
* Patches by Denis Peter, 03 April 2003:
- fix PCI IRQs on MPL boards
- fix two more un-relocated pointer problems
* Fix behaviour of "run" command:
- print error message iv variable does not exist
- terminate processing of arguments in case of error
* Patches by Peter Figuli, 10 Mar 2003
- Add support for BTUART on PXA platform
- Add support for WEP EP250 (PXA) board
* Fix flash problems on INCA-IP; add tool to allow bruning images to
flash using a BDI2000
* Implement fix for I2C Edge Conditions problem for all boards that
use the bit-banging driver (common/soft_i2c.c)
* Add patches by Robert Schwebel, 31 Mar 2003:
- csb226 board: bring in sync with innokom/memsetup.S
- csb226 board: fix MDREFR handling
- misc doc fixes / extensions
- innokom board: cleanup, MDREFR fix in memsetup.S, config update
- add BOOT_PROGRESS to armlinux.c
Diffstat (limited to 'doc/I2C_Edge_Conditions')
| -rw-r--r-- | doc/I2C_Edge_Conditions | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/I2C_Edge_Conditions b/doc/I2C_Edge_Conditions index 91557a3..be7f1be 100644 --- a/doc/I2C_Edge_Conditions +++ b/doc/I2C_Edge_Conditions @@ -31,8 +31,13 @@ Notes !!!THIS IS AN UNDOCUMENTED I2C BUS BUG, NOT A IBM 4xx BUG!!! This reset edge condition could possibly be present in every I2C -controller and device available. We should probably have a bus reset -function for all our target CPUs. +controller and device available. For boards where a I2C bus reset +function can be implemented a i2c_init_board() function should be +provided and enabled by #define'ing CFG_I2C_INIT_BOARD in your +board's config file. Note that this is NOT necessary when using the +bit-banging I2C driver (common/soft_i2c.c) as this already includes +the I2C bus reset sequence. + Many thanks to Bill Hunter for finding this serious BUG. email to: <williamhunter@attbi.com> |