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

Pull more i2c updates from Wolfram Sang:
 "A small update pull request from I2C.

  This adds one comment to a change we did in this merge window to
  handle lockdep better, and pulls in a branch which should have been in
  4.8 already improving DT support for I2C"

* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  gpio: pca953x: add a comment explaining the need for a lockdep subclass
  i2c: core: Add support for 'i2c-bus' subnode
  dt-bindings: i2c: Add support for 'i2c-bus' subnode

Documentation/devicetree/bindings/i2c/i2c.txt

@@ -32,6 +32,14 @@ wants to support one of the below features, it should adapt the bindings below.
 - clock-frequency
 	frequency of bus clock in Hz.
 
+- i2c-bus
+	For I2C adapters that have child nodes that are a mixture of both I2C
+	devices and non-I2C devices, the 'i2c-bus' subnode can be used for
+	populating I2C devices. If the 'i2c-bus' subnode is present, only
+	subnodes of this will be considered as I2C slaves. The properties,
+	'#address-cells' and '#size-cells' must be defined under this subnode
+	if present.
+
 - i2c-scl-falling-time-ns
 	Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
 	specification.