Merge branch 'i2c/for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:
 "Highlights:

   - new drivers for Mediatek I2C, APM X-Gene, Broadcom Settop
   - major updates to at91, davinci
   - bugfixes to the mux infrastructure when dealing with the new quirk
     mechanism
   - more users for the bus recovery feature
   - further improvements to the slave framework

  Plus the usual bunch of smaller driver and core improvements and
  fixes.

  There is one patch removing old code from an ARM platform.  This has
  been acked by the sh_mobile maintainer Simon Horman"

* 'i2c/for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (48 commits)
  i2c: busses: i2c-bcm2835: limits cdiv to allowed values
  i2c: sh_mobile: use proper type for timeout
  i2c: sh_mobile: use adapter default for timeout
  i2c: rcar: use proper type for timeout
  i2c: rcar: use adapter default for timeout
  i2c: designware: Make sure the device is suspended before disabling runtime PM
  i2c: tegra: apply size limit quirk
  i2c: tegra: don't advertise SMBUS_QUICK
  i2c: octeon: remove unused signal handling
  i2c: davinci: Optimize SCL generation
  i2c: mux: pca954x: Use __i2c_transfer because of quirks
  i2c: mux: Use __i2c_transfer() instead of calling parent's master_xfer()
  i2c: use parent adapter quirks in mux
  i2c: bcm2835: clear reserved bits in S-Register
  ARM: shmobile: r8a7740: remove I2C errata handling
  i2c: sh_mobile: add errata workaround
  i2c: at91: fix code checker warnings
  i2c: busses: xgene-slimpro: fix incorrect __init declation for probe
  i2c: davinci: Avoid sending to own address
  i2c: davinci: Refactor i2c_davinci_wait_bus_not_busy()
  ...

Documentation/i2c/slave-interface

@@ -3,16 +3,16 @@ Linux I2C slave interface description
 
 by Wolfram Sang <wsa@sang-engineering.com> in 2014-15
 
-Linux can also be an I2C slave in case I2C controllers have slave support.
-Besides this HW requirement, one also needs a software backend providing the
-actual functionality. An example for this is the slave-eeprom driver, which
-acts as a dual memory driver. While another I2C master on the bus can access it
-like a regular EEPROM, the Linux I2C slave can access the content via sysfs and
-retrieve/provide information as needed. The software backend driver and the I2C
-bus driver communicate via events. Here is a small graph visualizing the data
-flow and the means by which data is transported. The dotted line marks only one
-example. The backend could also use e.g. a character device, be in-kernel
-only, or something completely different:
+Linux can also be an I2C slave if the I2C controller in use has slave
+functionality. For that to work, one needs slave support in the bus driver plus
+a hardware independent software backend providing the actual functionality. An
+example for the latter is the slave-eeprom driver, which acts as a dual memory
+driver. While another I2C master on the bus can access it like a regular
+EEPROM, the Linux I2C slave can access the content via sysfs and handle data as
+needed. The backend driver and the I2C bus driver communicate via events. Here
+is a small graph visualizing the data flow and the means by which data is
+transported. The dotted line marks only one example. The backend could also
+use a character device, be in-kernel only, or something completely different:
 
 
               e.g. sysfs        I2C slave events        I/O registers
@@ -43,6 +43,11 @@ behaviour and setup.
 Developer manual
 ================
 
+First, the events which are used by the bus driver and the backend will be
+described in detail. After that, some implementation hints for extending bus
+drivers and writing backends will be given.
+
+
 I2C slave events
 ----------------