On Wed, Jun 29, 2016 at 10:17:52AM +0100, Jon Hunter wrote:
The I2C driver core for boards using device-tree assumes any subnode of an I2C adapter in the device-tree blob is an I2C slave device. Although this makes complete sense, some I2C adapters may have subnodes which are not I2C slaves but subnodes presenting other features. For example some Tegra devices have an I2C interface which may share its pins with other devices. In order to share these pins using the pinctrl framework, it is necessary to add subnodes to the I2C device node that represent these pins.
To allow I2C adapters to have non-I2C specific subnodes in device-tree that are not parsed by the I2C driver core, add support for an optional 'i2c-bus' subnode where I2C slaves can be placed. If the 'i2c-bus' subnode is present then all I2C slaves must be placed under this subnode.
Signed-off-by: Jon Hunter jonathanh@nvidia.com Acked-by: Thierry Reding treding@nvidia.com Acked-by: Rob Herring robh@kernel.org
Acked-by: Wolfram Sang wsa@the-dreams.de