[deliverable/linux.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_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_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
1e9c2859 BS	73	config GPIO_PL061
	74	bool "PrimeCell PL061 GPIO support"
	75	depends on ARM_AMBA
	76	help
	77	Say yes here to support the PrimeCell PL061 GPIO device
	78
0bcb6069 JL	79	config GPIO_XILINX
0bcb6069 JL	80	bool "Xilinx GPIO support"
6fa612b5	81	depends on PPC_OF \|\| MICROBLAZE
0bcb6069 JL	82	help
	83	Say yes here to support the Xilinx FPGA GPIO device
	84
27fdd325 YY	85	config GPIO_VR41XX
	86	tristate "NEC VR4100 series General-purpose I/O Uint support"
	87	depends on CPU_VR41XX
	88	help
	89	Say yes here to support the NEC VR4100 series General-purpose I/O Uint
	90
a9c5fff5 DB	91	comment "I2C GPIO expanders:"
a9c5fff5 DB	92
e952805d WS	93	config GPIO_MAX7300
	94	tristate "Maxim MAX7300 GPIO expander"
	95	depends on I2C
	96	select GPIO_MAX730X
	97	help
	98	GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
	99
bbcd6d54 EM	100	config GPIO_MAX732X
	101	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
	102	depends on I2C
	103	help
	104	Say yes here to support the MAX7319, MAX7320-7327 series of I2C
	105	Port Expanders. Each IO port on these chips has a fixed role of
	106	Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
	107	Input and Output (designed by 'P'). The combinations are listed
	108	below:
	109
	110	8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
	111	max7322 (4I4O), max7323 (4P4O)
	112
	113	16 bits: max7324 (8I8O), max7325 (8P8O),
	114	max7326 (4I12O), max7327 (4P12O)
	115
	116	Board setup code must specify the model to use, and the start
	117	number for these GPIOs.
	118
f3dc3630	119	config GPIO_PCA953X
ab5dc372	120	tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
9e60fdcf	121	depends on I2C
9e60fdcf	122	help
7059d4b0 DB	123	Say yes here to provide access to several register-oriented
	124	SMBus I/O expanders, made mostly by NXP or TI. Compatible
	125	models include:
	126
	127	4 bits: pca9536, pca9537
	128
ab5dc372 DB	129	8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
ab5dc372 DB	130	tca6408
7059d4b0	131
ab5dc372	132	16 bits: pca9535, pca9539, pca9555, tca6416
9e60fdcf	133
9e60fdcf	134	This driver can also be built as a module. If so, the module
f3dc3630	135	will be called pca953x.
9e60fdcf	136
89ea8bbe MZ	137	config GPIO_PCA953X_IRQ
	138	bool "Interrupt controller support for PCA953x"
	139	depends on GPIO_PCA953X=y
	140	help
	141	Say yes here to enable the pca953x to be used as an interrupt
	142	controller. It requires the driver to be built in the kernel.
	143
15fae37d	144	config GPIO_PCF857X
1673ad52	145	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
15fae37d DB	146	depends on I2C
	147	help
	148	Say yes here to provide access to most "quasi-bidirectional" I2C
	149	GPIO expanders used for additional digital outputs or inputs.
	150	Most of these parts are from NXP, though TI is a second source for
	151	some of them. Compatible models include:
	152
	153	8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
1673ad52 DB	154	pca9670, pca9672, pca9674, pca9674a,
1673ad52 DB	155	max7328, max7329
15fae37d DB	156
	157	16 bits: pcf8575, pcf8575c, pca8575,
	158	pca9671, pca9673, pca9675
	159
	160	Your board setup code will need to declare the expanders in
	161	use, and assign numbers to the GPIOs they expose. Those GPIOs
	162	can then be used from drivers and other kernel code, just like
	163	other GPIOs, but only accessible from task contexts.
	164
	165	This driver provides an in-kernel interface to those GPIOs using
	166	platform-neutral GPIO calls.
	167
e9d35947 DB	168	config GPIO_TWL4030
	169	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
	170	depends on TWL4030_CORE
	171	help
	172	Say yes here to access the GPIO signals of various multi-function
	173	power management chips from Texas Instruments.
	174
e4b736f1 MB	175	config GPIO_WM831X
	176	tristate "WM831x GPIOs"
	177	depends on MFD_WM831X
	178	help
	179	Say yes here to access the GPIO signals of WM831x power management
	180	chips from Wolfson Microelectronics.
	181
ef72af40 MH	182	config GPIO_ADP5520
	183	tristate "GPIO Support for ADP5520 PMIC"
	184	depends on PMIC_ADP5520
	185	help
	186	This option enables support for on-chip GPIO found
	187	on Analog Devices ADP5520 PMICs.
	188
	189	To compile this driver as a module, choose M here: the module will
	190	be called adp5520-gpio.
	191
80884094 MH	192	config GPIO_ADP5588
	193	tristate "ADP5588 I2C GPIO expander"
	194	depends on I2C
	195	help
	196	This option enables support for 18 GPIOs found
	197	on Analog Devices ADP5588 GPIO Expanders.
	198	To compile this driver as a module, choose M here: the module will be
	199	called adp5588-gpio.
	200
ff1d5c2f MB	201	comment "PCI GPIO expanders:"
ff1d5c2f MB	202
5f0a96b0 AS	203	config GPIO_CS5535
5f0a96b0 AS	204	tristate "AMD CS5535/CS5536 GPIO support"
c95d1e53	205	depends on PCI && !CS5535_GPIO
5f0a96b0 AS	206	help
	207	The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
	208	can be used for quite a number of things. The CS5535/6 is found on
	209	AMD Geode and Lemote Yeeloong devices.
	210
	211	If unsure, say N.
	212
ff1d5c2f MB	213	config GPIO_BT8XX
	214	tristate "BT8XX GPIO abuser"
	215	depends on PCI && VIDEO_BT848=n
	216	help
	217	The BT8xx frame grabber chip has 24 GPIO pins than can be abused
	218	as a cheap PCI GPIO card.
	219
	220	This chip can be found on Miro, Hauppauge and STB TV-cards.
	221
	222	The card needs to be physically altered for using it as a
	223	GPIO card. For more information on how to build a GPIO card
	224	from a BT8xx TV card, see the documentation file at
	225	Documentation/bt8xxgpio.txt
	226
	227	If unsure, say N.
	228
8bf02617 AD	229	config GPIO_LANGWELL
	230	bool "Intel Moorestown Platform Langwell GPIO support"
	231	depends on PCI
	232	help
	233	Say Y here to support Intel Moorestown platform GPIO.
	234
35570ac6 RR	235	config GPIO_TIMBERDALE
	236	bool "Support for timberdale GPIO IP"
	237	depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
	238	---help---
	239	Add support for the GPIO IP in the timberdale FPGA.
	240
a9c5fff5 DB	241	comment "SPI GPIO expanders:"
a9c5fff5 DB	242
0c36ec31 JB	243	config GPIO_MAX7301
	244	tristate "Maxim MAX7301 GPIO expander"
	245	depends on SPI_MASTER
e952805d	246	select GPIO_MAX730X
0c36ec31	247	help
e952805d	248	GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
0c36ec31	249
e58b9e27 DB	250	config GPIO_MCP23S08
	251	tristate "Microchip MCP23S08 I/O expander"
	252	depends on SPI_MASTER
	253	help
	254	SPI driver for Microchip MCP23S08 I/O expander. This provides
	255	a GPIO interface supporting inputs and outputs.
	256
1e5db006 RR	257	config GPIO_MC33880
	258	tristate "Freescale MC33880 high-side/low-side switch"
	259	depends on SPI_MASTER
	260	help
	261	SPI driver for Freescale MC33880 high-side/low-side switch.
	262	This provides GPIO interface supporting inputs and outputs.
	263
4cf8e53b MV	264	comment "AC97 GPIO expanders:"
	265
	266	config GPIO_UCB1400
	267	bool "Philips UCB1400 GPIO"
	268	depends on UCB1400_CORE
	269	help
	270	This enables support for the Philips UCB1400 GPIO pins.
	271	The UCB1400 is an AC97 audio codec.
	272
	273	To compile this driver as a module, choose M here: the
	274	module will be called ucb1400_gpio.
	275
7444a72e	276	endif