SC20 device tree dtsi file gpio flags

In various dtsi files there are gpio flags but haven’t found a reference for flag definitions.

For example in msm8909-mtp.dtsi file:
interrupt-gpios = <&msm_gpio 13 0x2008>
avago,irq-gpio = <&msm_gpio 94 0x2002>
stk,irq-gpio = <&msm_gpio 94 0x02>

The first number is the gpio number and the second number is config flags.

What is the definition of the flag bits?

Thank you!

take the example of sc20-android7