From 3e38691e8f7aa0d9b498d76c7279ddec6e4946f3 Mon Sep 17 00:00:00 2001 From: wdenk Date: Sat, 5 Apr 2003 00:53:31 +0000 Subject: * 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 --- doc/I2C_Edge_Conditions | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'doc/I2C_Edge_Conditions') diff --git a/doc/I2C_Edge_Conditions b/doc/I2C_Edge_Conditions index 91557a3ca9..be7f1bee1f 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: -- cgit v1.2.1