On 5/4/2012 3:10 PM, Viresh KUMAR wrote: > Add i2c bus recovery infrastructure to i2c adapters as specified in the i2c > protocol Rev. 03 section 3.16 titled "Bus clear". > > http://www.nxp.com/documents/user_manual/UM10204.pdf > > Sometimes during operation i2c bus hangs and we need to give dummy clocks to > slave device to start the transfer again. Now we may have capability in the bus > controller to generate these clocks or platform may have gpio pins which can be > toggled to generate dummy clocks. This patch supports both. > > This patch also adds in generic bus recovery routines gpio or scl line based > which can be used by bus controller. In addition controller driver may provide > its own version of the bus recovery routine. > > Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxx> > --- > Documentation/i2c/bus-recovery | 87 ++++++++++++++++++++++ > drivers/i2c/i2c-core.c | 160 ++++++++++++++++++++++++++++++++++++++++ > drivers/i2c/i2c-mux.c | 9 ++- > include/linux/i2c.h | 58 ++++++++++++++ > 4 files changed, 313 insertions(+), 1 deletions(-) > create mode 100644 Documentation/i2c/bus-recovery Hi Wolfram, Any inputs on this patch. -- viresh -- 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
