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.
This supports for Marvell 88PM8606/88PM8607 Power Management IC. This includes the I2C driver and the core APIs _only_, you have to select individual components like voltage regulators, RTC and battery-charger under the corresponding menus.
This is the core driver for the Silicon Motion SM501 multimedia companion chip. This device is a multifunction device which may provide numerous interfaces including USB host controller, USB gadget, asynchronous serial ports, audio functions, and a dual display video interface. The device may be connected by PCI or local bus with varying functions enabled.
This option uses the gpio library layer to export the 64 GPIO lines on the SM501. The platform data is used to supply the base number for the first GPIO line to register.
This driver supports the ASIC3 multifunction chip found on many PDAs (mainly iPAQ and HTC based ones)
This driver supports the MSP430 microcontroller used on these boards. MSP430 firmware manages resets and power sequencing, inputs from buttons and the IR remote, LEDs, an RTC, and more.
Say Y here if you want support for the Sequencer Serial Port in a Texas Instruments TNETV107X SoC. To compile this driver as a module, choose M here: the module will be called ti-ssp.
This driver supports the CPLD egpio chip present on several HTC phones. It provides basic support for input pins, output pins, and irqs.
This core driver provides register access for the LED/DS1WM chips labeled "AIC2" and "AIC3", found on HTC Blueangel and HTC Magician devices, respectively. Actual functionality is handled by the leds-pasic3 and ds1wm drivers.
If you say yes here you get support for the supposed CPLD found on omap850 HTC devices like the HTC Wizard and HTC Herald. This device provides input and output GPIOs through an I2C interface to one or more sub-chips.
This enables support for the Philips UCB1400 core functions. The UCB1400 is an AC97 audio codec. To compile this driver as a module, choose M here: the module will be called ucb1400_core.
This option enables a driver for the TP61050/TPS61052 high-power "white LED driver". This boost converter is sometimes used for other things than white LEDs, and also contains a GPIO pin.
If you say yes here you get support for the TPS6501x series of Power Management chips. These include voltage regulators, lithium ion/polymer battery charging, and other features that are often used in portable devices like cell phones and cameras. This driver can also be built as a module. If so, the module will be called tps65010.
If you say yes here you get support for the TPS6507x series of Power Management / Touch Screen chips. These include voltage regulators, lithium ion/polymer battery charging, touch screen and other features that are often used in portable devices. This driver can also be built as a module. If so, the module will be called tps6507x.
If you say yes here you get support for the TPS6586X series of Power Management chips. This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device. This driver can also be built as a module. If so, the module will be called tps6586x.
If you say yes here you get support for the Texas Instruments TWL92330/Menelaus Power Management chip. This include voltage regulators, Dual slot memory card transceivers, real-time clock and other features that are often used in portable devices like cell phones and PDAs.
Say yes here if you have TWL4030 / TWL6030 family chip on your board. This core driver provides register access and IRQ handling facilities, and registers devices for the various functions so that function-specific drivers can bind to them. These multi-function chips are found on many OMAP2 and OMAP3 boards, providing power management, RTC, GPIO, keypad, a high speed USB OTG transceiver, an audio codec (on most versions) and many other features.
This driver provides support for triton TWL4030-MADC. The driver supports both RT and SW conversion methods. This driver can be built as a module. If so it will be named twl4030-madc
Say yes here if you want to use the power resources on the TWL4030 family chips. Most of these resources are regulators, which have a separate driver; some are control signals, such as clock request handshaking. This driver uses board-specific data to initialize the resources and load scripts controlling which resources are switched off/on or reset when a sleep, wakeup or warm reset event occurs.
Say yes here if you want support for TWL6030 PWM. This is used to control charging LED brightness.
Support for the STMPE family of I/O Expanders from STMicroelectronics. Currently supported devices are: STMPE811: GPIO, Touchscreen STMPE1601: GPIO, Keypad STMPE2401: GPIO, Keypad STMPE2403: GPIO, Keypad This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device. Currently available sub drivers are: GPIO: stmpe-gpio Keypad: stmpe-keypad Touchscreen: stmpe-ts
Support for the Toshiba TC35892 and variants I/O Expander. This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
Support for Toshiba Mobile IO Controller T7L66XB
Support for Toshiba Mobile IO Controller TC6387XB
Support for Toshiba Mobile IO Controller TC6393XB
Say yes here to support for Dialog Semiconductor DA9030 (a.k.a ARAVA) and DA9034 (a.k.a MICCO), these are Power Management IC usually found on PXA processors-based platforms. This includes the I2C driver and the core APIs _only_, you have to select individual components like LCD backlight, voltage regulators, LEDs and battery-charger under the corresponding menus.
Say yes here to add support for Analog Devices AD5520 and ADP5501, Multifunction Power Management IC. This includes the I2C driver and the core APIs _only_, you have to select individual components like LCD backlight, LEDs, GPIOs and Kepad under the corresponding menus.
Say yes here to support for Maxim Semiconductor MAX8925. This is a Power Management IC. This driver provies common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
Say yes here to support for Maxim Semiconductor MAX8998/8966. This is a Power Management IC with RTC, Flash, Fuel Gauge, Haptic, MUIC controls on chip. This driver provides common support for accessing the device; additional drivers must be enabled in order to use the functionality of the device.
Say yes here to support for Maxim Semiconductor MAX8998 and National Semiconductor LP3974. This is a Power Management IC. This driver provies common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
Support for the Wolfson Microelecronics WM8400 PMIC and audio CODEC. This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
Support for the Wolfson Microelecronics WM831x and WM832x PMICs when controlled using I2C. This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
Support for the Wolfson Microelecronics WM831x and WM832x PMICs when controlled using SPI. This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
The WM8350 is an integrated audio and power management subsystem with watchdog and RTC functionality for embedded systems. This option enables core support for the WM8350 with I2C as the control interface. Additional options must be selected to enable support for the functionality of the chip.
The WM8994 is a highly integrated hi-fi CODEC designed for smartphone applicatiosn. As well as audio functionality it has on board GPIO and regulator functionality which is supported via the relevant subsystems. This driver provides core support for the WM8994, in order to use the actual functionaltiy of the device other drivers must be enabled.
Say yes here if you have NXP PCF50633 chip on your board. This core driver provides register access and IRQ handling facilities, and registers devices for the various functions so that function-specific drivers can bind to them.
Say yes here if you want to include support for ADC in the NXP PCF50633 chip.
Say yes here if you want to include support GPIO for pins on the PCF50633 chip.
Support for the Freescale (Atlas) PMIC and audio CODECs MC13783 and MC13892. This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device.
Say yes here if you have the ABX500 Mixed Signal IC family chips. This core driver expose register access functions. Functionality specific drivers using these functions can remain unchanged when IC changes. Binding of the functions to actual register access is done by the IC core driver.
Select this to enable the AB3100 Mixed Signal IC core functionality. This connects to a AB3100 on the I2C bus and expose a number of symbols needed for dependent devices to read and write registers and subscribe to events from this multi-functional IC. This is needed to use other features of the AB3100 such as battery-backed RTC, charging control, LEDs, vibrator, system power and temperature, power management and ALSA sound.
Select this to enable the AB3100 Mixed Signal IC OTP (one-time programmable memory) support. This exposes a sysfs file to read out OTP values.
This enables the PCAP ASIC present on EZX Phones. This is needed for MMC, TouchScreen, Sound, USB, etc..
Select this option to enable access to AB8500 power management chip. This connects to U8500 either on the SSP/SPI bus (deprecated since hardware version v1.0) or the I2C bus via PRCMU. It also adds the irq_chip parts for handling the Mixed Signal chip events. This chip embeds various other multimedia funtionalities as well.
This enables register access to the AB8500 chip via PRCMU I2C. The AB8500 chip can be accessed via SPI or I2C. On DB8500 hardware the I2C bus is connected to the Power Reset and Mangagement Unit, PRCMU.
Select this option if you want debug information using the debug filesystem, debugfs.
AB8500 GPADC driver used to convert Acc and battery/ac/usb voltage
Select this to enable the AB3550 Mixed Signal IC core functionality. This connects to a AB3550 on the I2C bus and expose a number of symbols needed for dependent devices to read and write registers and subscribe to events from this multi-functional IC. This is needed to use other features of the AB3550 such as battery-backed RTC, charging control, LEDs, vibrator, system power and temperature, power management and ALSA sound.
Select this option to enable support for the DB8500 Power Reset and Control Management Unit. This is basically an autonomous system controller running an XP70 microprocessor, which is accessed through a register map.
Select this option to enable support for the DB5500 Power Reset and Control Management Unit. This is basically an autonomous system controller running an XP70 microprocessor, which is accessed through a register map.
This is the core driver for CS5535/CS5536 MFD functions. This is necessary for using the board's GPIO and MFGPT functionality.
This is the core driver for the timberdale FPGA. This device is a multifunction device which exposes numerous platform devices. The timberdale FPGA can be found on the Intel Atom development board for in-vehicle infontainment, called Russellville.
LPC bridge function of the Intel SCH provides support for System Management Bus and General Purpose I/O.
Say yes here if you want to have support for the RDC R-321x SoC southbridge which provides access to GPIOs and Watchdog using the southbridge PCI device configuration space.
This is the core driver for the Janz CMOD-IO PCI MODULbus carrier board. This device is a PCI to MODULbus bridge which may host many different types of MODULbus daughterboards, including CAN and GPIO controllers.
Say yes here if you want support for the ADC unit in the JZ4740 SoC. This driver is necessary for jz4740-battery and jz4740-hwmon driver.
Say yes here to enable support for various functions of the VIA VX855/VX875 south bridge. You will need to enable the vx855_spi and/or vx855_gpio drivers for this to do anything useful.
This is the core driver for the TI WL1273 FM radio. This MFD driver connects the radio-wl1273 V4L2 module and the wl1273 audio codec.
This is the core driver for the OAMP EHCI and OHCI drivers. This MFD driver does the required setup functionalities for OMAP USB Host drivers.
If you say yes to this option, support will be included for the built-in PM8921 PMIC chip. This is required if your board has a PM8921 and uses its features, such as: MPPs, GPIOs, regulators, interrupts, and PWM. Say M here if you want to include support for PM8921 chip as a module. This will build a module called "pm8921-core".
This is the IRQ driver for Qualcomm PM 8xxx PMIC chips. This is required to use certain other PM 8xxx features, such as GPIO and MPP.
if you say yes here you get support for the TPS65910 series of Power Management chips.