[net-next-2.6.git] / drivers / gpio / Kconfig

#
# GPIO infrastructure and expanders
#

config ARCH_WANT_OPTIONAL_GPIOLIB
	bool
	help
	  Select this config option from the architecture Kconfig, if
	  it is possible to use gpiolib on the architecture, but let the
	  user decide whether to actually build it or not.
	  Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
	  not depend on GPIOs being available, but rather let the user
	  decide whether he needs it or not.

config ARCH_REQUIRE_GPIOLIB
	bool
	select GPIOLIB
	help
	  Platforms select gpiolib if they use this infrastructure
	  for all their GPIOs, usually starting with ones integrated
	  into SOC processors.
	  Selecting this from the architecture code will cause the gpiolib
	  code to always get built in.


menuconfig GPIOLIB
	bool "GPIO Support"
	depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB
	select GENERIC_GPIO
	help
	  This enables GPIO support through the generic GPIO library.
	  You only need to enable this, if you also want to enable
	  one or more of the GPIO expansion card drivers below.

	  If unsure, say N.

if GPIOLIB

config DEBUG_GPIO
	bool "Debug GPIO calls"
	depends on DEBUG_KERNEL
	help
	  Say Y here to add some extra checks and diagnostics to GPIO calls.
	  These checks help ensure that GPIOs have been properly initialized
	  before they are used, and that sleeping calls are not made from
	  non-sleeping contexts.  They can make bitbanged serial protocols
	  slower.  The diagnostics help catch the type of setup errors
	  that are most common when setting up new platforms or boards.

config GPIO_SYSFS
	bool "/sys/class/gpio/... (sysfs interface)"
	depends on SYSFS && EXPERIMENTAL
	help
	  Say Y here to add a sysfs interface for GPIOs.

	  This is mostly useful to work around omissions in a system's
	  kernel support.  Those are common in custom and semicustom
	  hardware assembled using standard kernels with a minimum of
	  custom patches.  In those cases, userspace code may import
	  a given GPIO from the kernel, if no kernel driver requested it.

	  Kernel drivers may also request that a particular GPIO be
	  exported to userspace; this can be useful when debugging.

# put expanders in the right section, in alphabetical order

config GPIO_MAX730X
	tristate

comment "Memory mapped GPIO expanders:"

config GPIO_IT8761E
	tristate "IT8761E GPIO support"
	depends on GPIOLIB
	help
	  Say yes here to support GPIO functionality of IT8761E super I/O chip.

config GPIO_PL061
	bool "PrimeCell PL061 GPIO support"
	depends on ARM_AMBA
	help
	  Say yes here to support the PrimeCell PL061 GPIO device

config GPIO_XILINX
	bool "Xilinx GPIO support"
	depends on PPC_OF || MICROBLAZE
	help
	  Say yes here to support the Xilinx FPGA GPIO device

config GPIO_VR41XX
	tristate "NEC VR4100 series General-purpose I/O Uint support"
	depends on CPU_VR41XX
	help
	  Say yes here to support the NEC VR4100 series General-purpose I/O Uint

comment "I2C GPIO expanders:"

config GPIO_MAX7300
	tristate "Maxim MAX7300 GPIO expander"
	depends on I2C
	select GPIO_MAX730X
	help
	  GPIO driver for Maxim MAX7301 I2C-based GPIO expander.

config GPIO_MAX732X
	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
	depends on I2C
	help
	  Say yes here to support the MAX7319, MAX7320-7327 series of I2C
	  Port Expanders. Each IO port on these chips has a fixed role of
	  Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
	  Input and Output (designed by 'P'). The combinations are listed
	  below:

	  8 bits:	max7319 (8I), max7320 (8O), max7321 (8P),
		  	max7322 (4I4O), max7323 (4P4O)

	  16 bits:	max7324 (8I8O), max7325 (8P8O),
		  	max7326 (4I12O), max7327 (4P12O)

	  Board setup code must specify the model to use, and the start
	  number for these GPIOs.

config GPIO_PCA953X
	tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
	depends on I2C
	help
	  Say yes here to provide access to several register-oriented
	  SMBus I/O expanders, made mostly by NXP or TI.  Compatible
	  models include:

	  4 bits:	pca9536, pca9537

	  8 bits:	max7310, pca9534, pca9538, pca9554, pca9557,
	  		tca6408

	  16 bits:	pca9535, pca9539, pca9555, tca6416

	  This driver can also be built as a module.  If so, the module
	  will be called pca953x.

config GPIO_PCA953X_IRQ
	bool "Interrupt controller support for PCA953x"
	depends on GPIO_PCA953X=y
	help
	  Say yes here to enable the pca953x to be used as an interrupt
	  controller. It requires the driver to be built in the kernel.

config GPIO_PCF857X
	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
	depends on I2C
	help
	  Say yes here to provide access to most "quasi-bidirectional" I2C
	  GPIO expanders used for additional digital outputs or inputs.
	  Most of these parts are from NXP, though TI is a second source for
	  some of them.  Compatible models include:

	  8 bits:   pcf8574, pcf8574a, pca8574, pca8574a,
	            pca9670, pca9672, pca9674, pca9674a,
	  	    max7328, max7329

	  16 bits:  pcf8575, pcf8575c, pca8575,
	            pca9671, pca9673, pca9675

	  Your board setup code will need to declare the expanders in
	  use, and assign numbers to the GPIOs they expose.  Those GPIOs
	  can then be used from drivers and other kernel code, just like
	  other GPIOs, but only accessible from task contexts.

	  This driver provides an in-kernel interface to those GPIOs using
	  platform-neutral GPIO calls.

config GPIO_TWL4030
	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
	depends on TWL4030_CORE
	help
	  Say yes here to access the GPIO signals of various multi-function
	  power management chips from Texas Instruments.

config GPIO_WM831X
	tristate "WM831x GPIOs"
	depends on MFD_WM831X
	help
	  Say yes here to access the GPIO signals of WM831x power management
	  chips from Wolfson Microelectronics.

config GPIO_WM8350
	tristate "WM8350 GPIOs"
	depends on MFD_WM8350
	help
	  Say yes here to access the GPIO signals of WM8350 power management
	  chips from Wolfson Microelectronics.

config GPIO_ADP5520
	tristate "GPIO Support for ADP5520 PMIC"
	depends on PMIC_ADP5520
	help
	  This option enables support for on-chip GPIO found
	  on Analog Devices ADP5520 PMICs.

	  To compile this driver as a module, choose M here: the module will
	  be called adp5520-gpio.

config GPIO_ADP5588
	tristate "ADP5588 I2C GPIO expander"
	depends on I2C
	help
	  This option enables support for 18 GPIOs found
	  on Analog Devices ADP5588 GPIO Expanders.
	  To compile this driver as a module, choose M here: the module will be
	  called adp5588-gpio.

comment "PCI GPIO expanders:"

config GPIO_CS5535
	tristate "AMD CS5535/CS5536 GPIO support"
	depends on PCI && !CS5535_GPIO
	help
	  The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
	  can be used for quite a number of things.  The CS5535/6 is found on
	  AMD Geode and Lemote Yeeloong devices.

	  If unsure, say N.

config GPIO_BT8XX
	tristate "BT8XX GPIO abuser"
	depends on PCI && VIDEO_BT848=n
	help
	  The BT8xx frame grabber chip has 24 GPIO pins than can be abused
	  as a cheap PCI GPIO card.

	  This chip can be found on Miro, Hauppauge and STB TV-cards.

	  The card needs to be physically altered for using it as a
	  GPIO card. For more information on how to build a GPIO card
	  from a BT8xx TV card, see the documentation file at
	  Documentation/bt8xxgpio.txt

	  If unsure, say N.

config GPIO_LANGWELL
	bool "Intel Moorestown Platform Langwell GPIO support"
	depends on PCI
	help
	  Say Y here to support Intel Moorestown platform GPIO.

config GPIO_TIMBERDALE
	bool "Support for timberdale GPIO IP"
	depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
	---help---
	Add support for the GPIO IP in the timberdale FPGA.

comment "SPI GPIO expanders:"

config GPIO_MAX7301
	tristate "Maxim MAX7301 GPIO expander"
	depends on SPI_MASTER
	select GPIO_MAX730X
	help
	  GPIO driver for Maxim MAX7301 SPI-based GPIO expander.

config GPIO_MCP23S08
	tristate "Microchip MCP23S08 I/O expander"
	depends on SPI_MASTER
	help
	  SPI driver for Microchip MCP23S08 I/O expander.  This provides
	  a GPIO interface supporting inputs and outputs.

config GPIO_MC33880
	tristate "Freescale MC33880 high-side/low-side switch"
	depends on SPI_MASTER
	help
	  SPI driver for Freescale MC33880 high-side/low-side switch.
	  This provides GPIO interface supporting inputs and outputs.

comment "AC97 GPIO expanders:"

config GPIO_UCB1400
	bool "Philips UCB1400 GPIO"
	depends on UCB1400_CORE
	help
	  This enables support for the Philips UCB1400 GPIO pins.
	  The UCB1400 is an AC97 audio codec.

	  To compile this driver as a module, choose M here: the
	  module will be called ucb1400_gpio.

endif
Commit	Line	Data
a9c5fff5 DB	1	#
	2	# GPIO infrastructure and expanders
	3	#
	4
7444a72e	5	config ARCH_WANT_OPTIONAL_GPIOLIB
a9c5fff5	6	bool
7444a72e MB	7	help
	8	Select this config option from the architecture Kconfig, if
	9	it is possible to use gpiolib on the architecture, but let the
	10	user decide whether to actually build it or not.
	11	Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
	12	not depend on GPIOs being available, but rather let the user
	13	decide whether he needs it or not.
	14
	15	config ARCH_REQUIRE_GPIOLIB
	16	bool
	17	select GPIOLIB
a9c5fff5 DB	18	help
	19	Platforms select gpiolib if they use this infrastructure
	20	for all their GPIOs, usually starting with ones integrated
	21	into SOC processors.
7444a72e MB	22	Selecting this from the architecture code will cause the gpiolib
	23	code to always get built in.
	24
	25
	26
	27	menuconfig GPIOLIB
	28	bool "GPIO Support"
	29	depends on ARCH_WANT_OPTIONAL_GPIOLIB \|\| ARCH_REQUIRE_GPIOLIB
	30	select GENERIC_GPIO
	31	help
	32	This enables GPIO support through the generic GPIO library.
	33	You only need to enable this, if you also want to enable
	34	one or more of the GPIO expansion card drivers below.
	35
	36	If unsure, say N.
a9c5fff5	37
7444a72e	38	if GPIOLIB
a9c5fff5 DB	39
	40	config DEBUG_GPIO
	41	bool "Debug GPIO calls"
	42	depends on DEBUG_KERNEL
	43	help
	44	Say Y here to add some extra checks and diagnostics to GPIO calls.
692105b8 ML	45	These checks help ensure that GPIOs have been properly initialized
	46	before they are used, and that sleeping calls are not made from
	47	non-sleeping contexts. They can make bitbanged serial protocols
a9c5fff5 DB	48	slower. The diagnostics help catch the type of setup errors
	49	that are most common when setting up new platforms or boards.
	50
d8f388d8 DB	51	config GPIO_SYSFS
	52	bool "/sys/class/gpio/... (sysfs interface)"
	53	depends on SYSFS && EXPERIMENTAL
	54	help
	55	Say Y here to add a sysfs interface for GPIOs.
	56
	57	This is mostly useful to work around omissions in a system's
	58	kernel support. Those are common in custom and semicustom
	59	hardware assembled using standard kernels with a minimum of
	60	custom patches. In those cases, userspace code may import
	61	a given GPIO from the kernel, if no kernel driver requested it.
	62
	63	Kernel drivers may also request that a particular GPIO be
	64	exported to userspace; this can be useful when debugging.
	65
a9c5fff5 DB	66	# put expanders in the right section, in alphabetical order
a9c5fff5 DB	67
e952805d WS	68	config GPIO_MAX730X
	69	tristate
	70
0bcb6069 JL	71	comment "Memory mapped GPIO expanders:"
0bcb6069 JL	72
9cc0cb3c DT	73	config GPIO_IT8761E
	74	tristate "IT8761E GPIO support"
	75	depends on GPIOLIB
	76	help
	77	Say yes here to support GPIO functionality of IT8761E super I/O chip.
	78
1e9c2859 BS	79	config GPIO_PL061
	80	bool "PrimeCell PL061 GPIO support"
	81	depends on ARM_AMBA
	82	help
	83	Say yes here to support the PrimeCell PL061 GPIO device
	84
0bcb6069 JL	85	config GPIO_XILINX
0bcb6069 JL	86	bool "Xilinx GPIO support"
6fa612b5	87	depends on PPC_OF \|\| MICROBLAZE
0bcb6069 JL	88	help
	89	Say yes here to support the Xilinx FPGA GPIO device
	90
27fdd325 YY	91	config GPIO_VR41XX
	92	tristate "NEC VR4100 series General-purpose I/O Uint support"
	93	depends on CPU_VR41XX
	94	help
	95	Say yes here to support the NEC VR4100 series General-purpose I/O Uint
	96
a9c5fff5 DB	97	comment "I2C GPIO expanders:"
a9c5fff5 DB	98
e952805d WS	99	config GPIO_MAX7300
	100	tristate "Maxim MAX7300 GPIO expander"
	101	depends on I2C
	102	select GPIO_MAX730X
	103	help
	104	GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
	105
bbcd6d54 EM	106	config GPIO_MAX732X
	107	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
	108	depends on I2C
	109	help
	110	Say yes here to support the MAX7319, MAX7320-7327 series of I2C
	111	Port Expanders. Each IO port on these chips has a fixed role of
	112	Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
	113	Input and Output (designed by 'P'). The combinations are listed
	114	below:
	115
	116	8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
	117	max7322 (4I4O), max7323 (4P4O)
	118
	119	16 bits: max7324 (8I8O), max7325 (8P8O),
	120	max7326 (4I12O), max7327 (4P12O)
	121
	122	Board setup code must specify the model to use, and the start
	123	number for these GPIOs.
	124
f3dc3630	125	config GPIO_PCA953X
ab5dc372	126	tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
9e60fdcf	127	depends on I2C
9e60fdcf	128	help
7059d4b0 DB	129	Say yes here to provide access to several register-oriented
	130	SMBus I/O expanders, made mostly by NXP or TI. Compatible
	131	models include:
	132
	133	4 bits: pca9536, pca9537
	134
ab5dc372 DB	135	8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
ab5dc372 DB	136	tca6408
7059d4b0	137
ab5dc372	138	16 bits: pca9535, pca9539, pca9555, tca6416
9e60fdcf	139
9e60fdcf	140	This driver can also be built as a module. If so, the module
f3dc3630	141	will be called pca953x.
9e60fdcf	142
89ea8bbe MZ	143	config GPIO_PCA953X_IRQ
	144	bool "Interrupt controller support for PCA953x"
	145	depends on GPIO_PCA953X=y
	146	help
	147	Say yes here to enable the pca953x to be used as an interrupt
	148	controller. It requires the driver to be built in the kernel.
	149
15fae37d	150	config GPIO_PCF857X
1673ad52	151	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
15fae37d DB	152	depends on I2C
	153	help
	154	Say yes here to provide access to most "quasi-bidirectional" I2C
	155	GPIO expanders used for additional digital outputs or inputs.
	156	Most of these parts are from NXP, though TI is a second source for
	157	some of them. Compatible models include:
	158
	159	8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
1673ad52 DB	160	pca9670, pca9672, pca9674, pca9674a,
1673ad52 DB	161	max7328, max7329
15fae37d DB	162
	163	16 bits: pcf8575, pcf8575c, pca8575,
	164	pca9671, pca9673, pca9675
	165
	166	Your board setup code will need to declare the expanders in
	167	use, and assign numbers to the GPIOs they expose. Those GPIOs
	168	can then be used from drivers and other kernel code, just like
	169	other GPIOs, but only accessible from task contexts.
	170
	171	This driver provides an in-kernel interface to those GPIOs using
	172	platform-neutral GPIO calls.
	173
e9d35947 DB	174	config GPIO_TWL4030
	175	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
	176	depends on TWL4030_CORE
	177	help
	178	Say yes here to access the GPIO signals of various multi-function
	179	power management chips from Texas Instruments.
	180
e4b736f1 MB	181	config GPIO_WM831X
	182	tristate "WM831x GPIOs"
	183	depends on MFD_WM831X
	184	help
	185	Say yes here to access the GPIO signals of WM831x power management
	186	chips from Wolfson Microelectronics.
	187
38f6ce45 MB	188	config GPIO_WM8350
	189	tristate "WM8350 GPIOs"
	190	depends on MFD_WM8350
	191	help
	192	Say yes here to access the GPIO signals of WM8350 power management
	193	chips from Wolfson Microelectronics.
	194
ef72af40 MH	195	config GPIO_ADP5520
	196	tristate "GPIO Support for ADP5520 PMIC"
	197	depends on PMIC_ADP5520
	198	help
	199	This option enables support for on-chip GPIO found
	200	on Analog Devices ADP5520 PMICs.
	201
	202	To compile this driver as a module, choose M here: the module will
	203	be called adp5520-gpio.
	204
80884094 MH	205	config GPIO_ADP5588
	206	tristate "ADP5588 I2C GPIO expander"
	207	depends on I2C
	208	help
	209	This option enables support for 18 GPIOs found
	210	on Analog Devices ADP5588 GPIO Expanders.
	211	To compile this driver as a module, choose M here: the module will be
	212	called adp5588-gpio.
	213
ff1d5c2f MB	214	comment "PCI GPIO expanders:"
ff1d5c2f MB	215
5f0a96b0 AS	216	config GPIO_CS5535
5f0a96b0 AS	217	tristate "AMD CS5535/CS5536 GPIO support"
c95d1e53	218	depends on PCI && !CS5535_GPIO
5f0a96b0 AS	219	help
	220	The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
	221	can be used for quite a number of things. The CS5535/6 is found on
	222	AMD Geode and Lemote Yeeloong devices.
	223
	224	If unsure, say N.
	225
ff1d5c2f MB	226	config GPIO_BT8XX
	227	tristate "BT8XX GPIO abuser"
	228	depends on PCI && VIDEO_BT848=n
	229	help
	230	The BT8xx frame grabber chip has 24 GPIO pins than can be abused
	231	as a cheap PCI GPIO card.
	232
	233	This chip can be found on Miro, Hauppauge and STB TV-cards.
	234
	235	The card needs to be physically altered for using it as a
	236	GPIO card. For more information on how to build a GPIO card
	237	from a BT8xx TV card, see the documentation file at
	238	Documentation/bt8xxgpio.txt
	239
	240	If unsure, say N.
	241
8bf02617 AD	242	config GPIO_LANGWELL
	243	bool "Intel Moorestown Platform Langwell GPIO support"
	244	depends on PCI
	245	help
	246	Say Y here to support Intel Moorestown platform GPIO.
	247
35570ac6 RR	248	config GPIO_TIMBERDALE
	249	bool "Support for timberdale GPIO IP"
	250	depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
	251	---help---
	252	Add support for the GPIO IP in the timberdale FPGA.
	253
a9c5fff5 DB	254	comment "SPI GPIO expanders:"
a9c5fff5 DB	255
0c36ec31 JB	256	config GPIO_MAX7301
	257	tristate "Maxim MAX7301 GPIO expander"
	258	depends on SPI_MASTER
e952805d	259	select GPIO_MAX730X
0c36ec31	260	help
e952805d	261	GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
0c36ec31	262
e58b9e27 DB	263	config GPIO_MCP23S08
	264	tristate "Microchip MCP23S08 I/O expander"
	265	depends on SPI_MASTER
	266	help
	267	SPI driver for Microchip MCP23S08 I/O expander. This provides
	268	a GPIO interface supporting inputs and outputs.
	269
1e5db006 RR	270	config GPIO_MC33880
	271	tristate "Freescale MC33880 high-side/low-side switch"
	272	depends on SPI_MASTER
	273	help
	274	SPI driver for Freescale MC33880 high-side/low-side switch.
	275	This provides GPIO interface supporting inputs and outputs.
	276
4cf8e53b MV	277	comment "AC97 GPIO expanders:"
	278
	279	config GPIO_UCB1400
	280	bool "Philips UCB1400 GPIO"
	281	depends on UCB1400_CORE
	282	help
	283	This enables support for the Philips UCB1400 GPIO pins.
	284	The UCB1400 is an AC97 audio codec.
	285
	286	To compile this driver as a module, choose M here: the
	287	module will be called ucb1400_gpio.
	288
7444a72e	289	endif