I am attempting to use a pca9539 I2C gpio driver on a PPC440EPx board. The
driver is "drivers/gpio/pca953x.c". I've added an entry to the .dts file:
IIC0: [EMAIL PROTECTED] {
compatible = "ibm,iic-440epx", "ibm,iic";
...
[EMAIL PROTECTED] {
compatible = "ti,pca9539";
reg = <76>;
};
};
of_register_i2c_devices sees this entry and calls i2c_new_device.
i2c_new_device copies info->platform_data to client->dev.platform_data, but
I think that this structure is empty (at least I don't see where
of_register_i2c_devices would set it).
pca953x_probe is eventually called, but it expects to find its "lowest gpio
number" in client->dev.platform_data->gpio_base, which has not been set. So
pca953x_probe returns -ENODEV.
I don't understand where the disconnect is. Should I be able to use the
pca953x.c driver, or is it somehow incompatible?
If it is incompatible, is there a strategy for making it compatible?
Steve
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