- 12 7月, 2007 1 次提交
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由 Jean Delvare 提交于
Let the drivers specify how many bytes they want to read with i2c_smbus_read_i2c_block_data(). So far, the block count was hard-coded to I2C_SMBUS_BLOCK_MAX (32), which did not make much sense. Many driver authors complained about this before, and I believe it's about time to fix it. Right now, authors have to do technically stupid things, such as individual byte reads or full-fledged I2C messaging, to work around the problem. We do not want to encourage that. I even found that some bus drivers (e.g. i2c-amd8111) already implemented I2C block read the "right" way, that is, they didn't follow the old, broken standard. The fact that it was never noticed before just shows how little i2c_smbus_read_i2c_block_data() was used, which isn't that surprising given how broken its prototype was so far. There are some obvious compatiblity considerations: * This changes the i2c_smbus_read_i2c_block_data() prototype. Users outside the kernel tree will notice at compilation time, and will have to update their code. * User-space has access to i2c_smbus_xfer() directly using i2c-dev, so the changed expectations would affect tools such as i2cdump. In order to preserve binary compatibility, we give I2C_SMBUS_I2C_BLOCK_DATA a new numeric value, and define I2C_SMBUS_I2C_BLOCK_BROKEN with the old numeric value. When i2c-dev receives a transaction with the old value, it can convert it to the new format on the fly. Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 06 9月, 2005 2 次提交
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由 bgardner@wabtec.com 提交于
Fix a spelling error and change a sysfs name. Signed-off-by: NBen Gardner <bgardner@wabtec.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 bgardner@wabtec.com 提交于
Updates to the max6875 driver documentation. This brings the documentation in sync with the code, which was recently simplified. This patch is based off 2.6.13-rc2-mm2. Signed-off-by: NBen Gardner <bgardner@wabtec.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 12 7月, 2005 1 次提交
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由 Jean Delvare 提交于
Here is a proposed documentation update for the new max6875 i2c chip driver. Signed-off-by: NJean Delvare <khali@linux-fr.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 22 6月, 2005 1 次提交
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由 BGardner@Wabtec.com 提交于
This patch adds support for the MAX6875/MAX6874 chips. Signed-off-by: NBen Gardner <bgardner@wabtec.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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