On Tue, May 15, 2012 at 7:58 AM, Viresh Kumar <viresh.ku...@st.com> wrote: > 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.ku...@st.com> >> --- >> 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.
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