On 24 January 2013 16:06, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote: > Add i2c bus recovery infrastructure to i2c adapters as specified in the i2c > protocol Rev. 03 section 3.1.16 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. > > This doesn't support multi-master recovery for now. > > Reviewed-by: Paul Carpenter <paul@xxxxxxxxxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> ARM mail servers are broken now a days, so these patches may not apply from mail. Find them attached.
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0001-i2c-adapter-Add-bus-recovery-infrastructure.patch
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0002-i2c-designware-Provide-i2c-bus-recovery-support.patch
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