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CONFIG_MFD_SUPPORT: Multifunction device drivers

General informations

The Linux kernel configuration item CONFIG_MFD_SUPPORT:

Help text

Multifunction devices embed several functions (e.g. GPIOs, touchscreens, keyboards, current regulators, power management chips, etc...) in one single integrated circuit. They usually talk to the main CPU through one or more IRQ lines and low speed data busses (SPI, I2C, etc..). They appear as one single device to the main system through the data bus and the MFD framework allows for sub devices (a.k.a. functions) to appear as discrete platform devices. MFDs are typically found on embedded platforms.

This option alone does not add any kernel code.

Hardware

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