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| i2c-at91.c i2c driver in linux-2.6.x really can't be use??? http://www.at91.com/samphpbb/viewtopic.php?f=12&t=4665 |
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| Author: | samssm [ Mon Jul 07, 2008 2:41 pm ] |
| Post subject: | i2c-at91.c i2c driver in linux-2.6.x really can't be use??? |
it seem have several serious problems to use this deriver, does it can be fixed? or any patch is available? thank for help. i2c-at91.c i2c bus driver have been marked as broken since linux-2.6.24(???) config I2C_AT91 tristate "Atmel AT91 I2C Two-Wire interface (TWI)" depends on ARCH_AT91 && EXPERIMENTAL && BROKEN help This supports the use of the I2C interface on Atmel AT91 processors. This driver is BROKEN because the controller which it uses will easily trigger RX overrun and TX underrun errors. Using low I2C clock rates may partially work around those issues on some systems. Another serious problem is that there is no documented way to issue repeated START conditions, as needed to support combined I2C messages. Use the i2c-gpio driver unless your system can cope with those limitations. |
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