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CONFIG_GPIO_ADNP: Avionic Design N-bit GPIO expander

General informations

The Linux kernel configuration item CONFIG_GPIO_ADNP:

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This option enables support for N GPIOs found on Avionic Design I2C GPIO expanders. The register space will be extended by powers of two, so the controller will need to accommodate for that. For example: if a controller provides 48 pins, 6 registers will be enough to represent all pins, but the driver will assume a register layout for 64 pins (8 registers).



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