--- On Sat, 7/5/11, Jean Delvare <khali@xxxxxxxxxxxx> wrote: > On Fri, 6 May 2011 04:30:33 -0700 (PDT), Lars Michael > wrote: > > But how do I access the same I2C device from several > modules? Ideally I want to specify the adapter and slave > address. If a client is found, I get the i2c_client > otherwise I have to create it by i2c_new_device (or probe > it). Is it possible? > > > > In general I would have pointed you to drivers/mfd and told > you to > write a mfd core driver for your chip. However in your case > I don't > think you have a multifunction device. You have a single > function > device (GPIO) with multiple users. So I suggest that you > simply write a > proper gpio driver for your chip, and get the device > registered as an > I2C GPIO device. Then, in your function drivers (power > supply control > and button control) get a reference to the gpio device in > question, and > use it. Thanks for the advice. I wrote a simple driver for my chip and instantiated it in the platform code. In order to access the device from the function modules, I exported an i2c_client get function, in order to get a reference to the client: struct i2c_client *pca950x_get_i2c_client(void) ..... EXPORT_SYMBOL(pca950x_get_i2c_client); Not sure this is the perfect way to do it, but it works. Thanks and regards, - Lars -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
