Recently, a number of submitted I2C master drivers could not fully handle all I2C type transfers due to limited HW. So, they had to bail out with some errno although the user supplied a valid I2C transfer. In order to centralize such quirks, a central structure describing the quirks is introduced. The next patch lets the core do the checks based on the information about the quirks. Then existing drivers with quirks are converted. This already has the advantage of avoiding code duplication and having consistent error handling. Later, once the structure is tested and stable, we can pass it over to the users, so they can actually check what the current HW is capable of and react accordingly. These patches are RFC and only build-tested so far. Yet, I wanted to show what I am up to. I will do some testing on HW once I finished my task of fixing the slave interface, hopefully after next week. I'd really love to see this go into v3.20, but this will need assistance. I really need testers, at least for the recent hardware. Other comments/reviews are also appreciated. Patches are based on v3.19-rc3 and the branch is here git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/quirks Thanks, Wolfram Wolfram Sang (11): i2c: add quirk structure to describe adapter flaws i2c: add quirk checks to core i2c: at91: make use of the new infrastructure for quirks i2c: opal: make use of the new infrastructure for quirks i2c: qup: make use of the new infrastructure for quirks i2c: cpm: make use of the new infrastructure for quirks i2c: axxia: make use of the new infrastructure for quirks i2c: dln2: make use of the new infrastructure for quirks i2c: powermac: make use of the new infrastructure for quirks i2c: viperboard: make use of the new infrastructure for quirks i2c: pmcmsp: make use of the new infrastructure for quirks drivers/i2c/busses/i2c-at91.c | 32 ++++++++-------------- drivers/i2c/busses/i2c-axxia.c | 11 ++++---- drivers/i2c/busses/i2c-cpm.c | 20 +++++++------- drivers/i2c/busses/i2c-dln2.c | 12 ++++----- drivers/i2c/busses/i2c-opal.c | 22 +++++++-------- drivers/i2c/busses/i2c-pmcmsp.c | 42 +++++++++++------------------ drivers/i2c/busses/i2c-powermac.c | 10 +++---- drivers/i2c/busses/i2c-qup.c | 21 +++++++-------- drivers/i2c/busses/i2c-viperboard.c | 10 ++++--- drivers/i2c/i2c-core.c | 53 +++++++++++++++++++++++++++++++++++++ include/linux/i2c.h | 35 ++++++++++++++++++++++++ 11 files changed, 167 insertions(+), 101 deletions(-) -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
