Support for PCA9539 as a GPIO chip is separated into two patches:
0001 - gpiolib: basic support for 16-bit PCA9539 GPIO expander
0002 - gpiolib: add Generic IRQ support for 16-bit PCA9539 GPIO expander
the 2nd one uses workqueue for IRQ handling due to the interrupt mode
nature of the i2c-core, thus making it a separate patch.
--
Cheers
- eric
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