Re: [PATCH] i2c-mpc: use the cell-index property to enumerate the I2C adapters

On 12/01/2011 03:46 PM, Timur Tabi wrote:

Scott Wood wrote:

quoted

How is this going to interact with other i2c buses (e.g. on a board
FPGA) that might have a conflicting static numbering scheme?  Have you
ensured that no dynamic bus registrations (e.g. an i2c bus on a PCI
device) can happen before the static SoC i2c buses are added?

Hmm.... You have a point there.

quoted

quoted

An alternative approach is to create a function like this:

	struct i2c_adapter *i2c_adapter_from_node(struct device_node *np);

I could then just use adap->nr directly.

If there isn't a way to get a "struct device" from "struct device_node",
we should add it. 

How do I do that?  Scan all the struct devices until I find one where dev->of_node == np?  That seems really inefficient.

Ideally we would have a field in struct device_node that points to
struct device.

-Scott