[mirror_ubuntu-eoan-kernel.git] / drivers / rtc / Kconfig

\#
# RTC class/drivers configuration
#

menu "Real Time Clock"

config RTC_LIB
	tristate

config RTC_CLASS
	tristate "RTC class"
	depends on EXPERIMENTAL
	default n
	select RTC_LIB
	help
	  Generic RTC class support. If you say yes here, you will
 	  be allowed to plug one or more RTCs to your system. You will
	  probably want to enable one or more of the interfaces below.

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

config RTC_HCTOSYS
	bool "Set system time from RTC on startup"
	depends on RTC_CLASS = y
	default y
	help
	  If you say yes here, the system time will be set using
	  the value read from the specified RTC device. This is useful
	  in order to avoid unnecessary fschk runs.

config RTC_HCTOSYS_DEVICE
	string "The RTC to read the time from"
	depends on RTC_HCTOSYS = y
	default "rtc0"
	help
	  The RTC device that will be used as the source for
	  the system time, usually rtc0.

comment "RTC interfaces"
	depends on RTC_CLASS

config RTC_INTF_SYSFS
	tristate "sysfs"
	depends on RTC_CLASS && SYSFS
	default RTC_CLASS
	help
	  Say yes here if you want to use your RTC using the sysfs
	  interface, /sys/class/rtc/rtcX .

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

config RTC_INTF_PROC
	tristate "proc"
	depends on RTC_CLASS && PROC_FS
	default RTC_CLASS
	help
	  Say yes here if you want to use your RTC using the proc
	  interface, /proc/driver/rtc .

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

config RTC_INTF_DEV
	tristate "dev"
	depends on RTC_CLASS
	default RTC_CLASS
	help
	  Say yes here if you want to use your RTC using the dev
	  interface, /dev/rtc .

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

config RTC_INTF_DEV_UIE_EMUL
	bool "RTC UIE emulation on dev interface"
	depends on RTC_INTF_DEV
	help
	  Provides an emulation for RTC_UIE if the underlaying rtc chip
	  driver did not provide RTC_UIE ioctls.

comment "RTC drivers"
	depends on RTC_CLASS

config RTC_DRV_X1205
	tristate "Xicor/Intersil X1205"
	depends on RTC_CLASS && I2C
	help
	  If you say yes here you get support for the
	  Xicor/Intersil X1205 RTC chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-x1205.

config RTC_DRV_DS1307
	tristate "Dallas/Maxim DS1307 and similar I2C RTC chips"
	depends on RTC_CLASS && I2C
	help
	  If you say yes here you get support for various compatible RTC
	  chips (often with battery backup) connected with I2C.  This driver
	  should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
	  and probably other chips.  In some cases the RTC must already
	  have been initialized (by manufacturing or a bootloader).

	  The first seven registers on these chips hold an RTC, and other
	  registers may add features such as NVRAM, a trickle charger for
	  the RTC/NVRAM backup power, and alarms.  This driver may not
	  expose all those available chip features.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-ds1307.

config RTC_DRV_DS1553
	tristate "Dallas DS1553"
	depends on RTC_CLASS
	help
	  If you say yes here you get support for the
	  Dallas DS1553 timekeeping chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-ds1553.

config RTC_DRV_DS1672
	tristate "Dallas/Maxim DS1672"
	depends on RTC_CLASS && I2C
	help
	  If you say yes here you get support for the
	  Dallas/Maxim DS1672 timekeeping chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-ds1672.

config RTC_DRV_DS1742
	tristate "Dallas DS1742"
	depends on RTC_CLASS
	help
	  If you say yes here you get support for the
	  Dallas DS1742 timekeeping chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-ds1742.

config RTC_DRV_PCF8563
	tristate "Philips PCF8563/Epson RTC8564"
	depends on RTC_CLASS && I2C
	help
	  If you say yes here you get support for the
	  Philips PCF8563 RTC chip. The Epson RTC8564
	  should work as well.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-pcf8563.

config RTC_DRV_PCF8583
	tristate "Philips PCF8583"
	depends on RTC_CLASS && I2C
	help
	  If you say yes here you get support for the
	  Philips PCF8583 RTC chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-pcf8583.

config RTC_DRV_RS5C348
	tristate "Ricoh RS5C348A/B"
	depends on RTC_CLASS && SPI
	help
	  If you say yes here you get support for the
	  Ricoh RS5C348A and RS5C348B RTC chips.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-rs5c348.

config RTC_DRV_RS5C372
	tristate "Ricoh RS5C372A/B"
	depends on RTC_CLASS && I2C
	help
	  If you say yes here you get support for the
	  Ricoh RS5C372A and RS5C372B RTC chips.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-rs5c372.

config RTC_DRV_S3C
	tristate "Samsung S3C series SoC RTC"
	depends on RTC_CLASS && ARCH_S3C2410
	help
	  RTC (Realtime Clock) driver for the clock inbuilt into the
	  Samsung S3C24XX series of SoCs. This can provide periodic
	  interrupt rates from 1Hz to 64Hz for user programs, and
	  wakeup from Alarm.

	  The driver currently supports the common features on all the
	  S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
	  and S3C2442.

	  This driver can also be build as a module. If so, the module
	  will be called rtc-s3c.

config RTC_DRV_M48T86
	tristate "ST M48T86/Dallas DS12887"
	depends on RTC_CLASS
	help
	  If you say Y here you will get support for the
	  ST M48T86 and Dallas DS12887 RTC chips.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-m48t86.

config RTC_DRV_EP93XX
	tristate "Cirrus Logic EP93XX"
	depends on RTC_CLASS && ARCH_EP93XX
	help
	  If you say yes here you get support for the
	  RTC embedded in the Cirrus Logic EP93XX processors.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-ep93xx.

config RTC_DRV_SA1100
	tristate "SA11x0/PXA2xx"
	depends on RTC_CLASS && (ARCH_SA1100 || ARCH_PXA)
	help
	  If you say Y here you will get access to the real time clock
	  built into your SA11x0 or PXA2xx CPU.

	  To compile this driver as a module, choose M here: the
	  module will be called rtc-sa1100.

config RTC_DRV_VR41XX
	tristate "NEC VR41XX"
	depends on RTC_CLASS && CPU_VR41XX
	help
	  If you say Y here you will get access to the real time clock
	  built into your NEC VR41XX CPU.

	  To compile this driver as a module, choose M here: the
	  module will be called rtc-vr41xx.

config RTC_DRV_PL031
	tristate "ARM AMBA PL031 RTC"
	depends on RTC_CLASS && ARM_AMBA
	help
	  If you say Y here you will get access to ARM AMBA
	  PrimeCell PL031 UART found on certain ARM SOCs.

	  To compile this driver as a module, choose M here: the
	  module will be called rtc-pl031.

config RTC_DRV_AT91
	tristate "AT91RM9200"
	depends on RTC_CLASS && ARCH_AT91RM9200
	help
	  Driver for the Atmel AT91RM9200's internal RTC (Realtime Clock).

config RTC_DRV_TEST
	tristate "Test driver/device"
	depends on RTC_CLASS
	help
	  If you say yes here you get support for the
	  RTC test driver. It's a software RTC which can be
	  used to test the RTC subsystem APIs. It gets
	  the time from the system clock.
	  You want this driver only if you are doing development
	  on the RTC subsystem. Please read the source code
	  for further details.

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

config RTC_DRV_MAX6902
	tristate "Maxim 6902"
	depends on RTC_CLASS && SPI
	help
	  If you say yes here you will get support for the
	  Maxim MAX6902 spi RTC chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-max6902.

config RTC_DRV_V3020
	tristate "EM Microelectronic V3020"
	depends on RTC_CLASS
	help
	  If you say yes here you will get support for the
	  EM Microelectronic v3020 RTC chip.

	  This driver can also be built as a module. If so, the module
	  will be called rtc-v3020.

endmenu
Commit	Line	Data
0c86edc0	1	\#
c58411e9 AZ	2	# RTC class/drivers configuration
	3	#
	4
0c86edc0 AZ	5	menu "Real Time Clock"
0c86edc0 AZ	6
c58411e9	7	config RTC_LIB
0c86edc0 AZ	8	tristate
	9
	10	config RTC_CLASS
	11	tristate "RTC class"
	12	depends on EXPERIMENTAL
	13	default n
	14	select RTC_LIB
	15	help
	16	Generic RTC class support. If you say yes here, you will
	17	be allowed to plug one or more RTCs to your system. You will
27ae4104	18	probably want to enable one or more of the interfaces below.
0c86edc0 AZ	19
	20	This driver can also be built as a module. If so, the module
	21	will be called rtc-class.
	22
	23	config RTC_HCTOSYS
	24	bool "Set system time from RTC on startup"
	25	depends on RTC_CLASS = y
	26	default y
	27	help
	28	If you say yes here, the system time will be set using
	29	the value read from the specified RTC device. This is useful
	30	in order to avoid unnecessary fschk runs.
	31
	32	config RTC_HCTOSYS_DEVICE
	33	string "The RTC to read the time from"
	34	depends on RTC_HCTOSYS = y
	35	default "rtc0"
	36	help
	37	The RTC device that will be used as the source for
	38	the system time, usually rtc0.
	39
	40	comment "RTC interfaces"
	41	depends on RTC_CLASS
	42
c5c3e192 AZ	43	config RTC_INTF_SYSFS
	44	tristate "sysfs"
	45	depends on RTC_CLASS && SYSFS
	46	default RTC_CLASS
	47	help
	48	Say yes here if you want to use your RTC using the sysfs
	49	interface, /sys/class/rtc/rtcX .
	50
	51	This driver can also be built as a module. If so, the module
	52	will be called rtc-sysfs.
	53
728a2947 AZ	54	config RTC_INTF_PROC
	55	tristate "proc"
	56	depends on RTC_CLASS && PROC_FS
	57	default RTC_CLASS
	58	help
	59	Say yes here if you want to use your RTC using the proc
	60	interface, /proc/driver/rtc .
	61
	62	This driver can also be built as a module. If so, the module
	63	will be called rtc-proc.
	64
e824290e AZ	65	config RTC_INTF_DEV
	66	tristate "dev"
	67	depends on RTC_CLASS
	68	default RTC_CLASS
	69	help
	70	Say yes here if you want to use your RTC using the dev
	71	interface, /dev/rtc .
	72
	73	This driver can also be built as a module. If so, the module
	74	will be called rtc-dev.
	75
655066c3 AN	76	config RTC_INTF_DEV_UIE_EMUL
	77	bool "RTC UIE emulation on dev interface"
	78	depends on RTC_INTF_DEV
	79	help
	80	Provides an emulation for RTC_UIE if the underlaying rtc chip
	81	driver did not provide RTC_UIE ioctls.
	82
0c86edc0 AZ	83	comment "RTC drivers"
	84	depends on RTC_CLASS
	85
1fec7c66 AZ	86	config RTC_DRV_X1205
	87	tristate "Xicor/Intersil X1205"
	88	depends on RTC_CLASS && I2C
	89	help
	90	If you say yes here you get support for the
	91	Xicor/Intersil X1205 RTC chip.
	92
	93	This driver can also be built as a module. If so, the module
	94	will be called rtc-x1205.
	95
1abb0dc9 DB	96	config RTC_DRV_DS1307
	97	tristate "Dallas/Maxim DS1307 and similar I2C RTC chips"
	98	depends on RTC_CLASS && I2C
	99	help
	100	If you say yes here you get support for various compatible RTC
	101	chips (often with battery backup) connected with I2C. This driver
	102	should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
	103	and probably other chips. In some cases the RTC must already
	104	have been initialized (by manufacturing or a bootloader).
	105
	106	The first seven registers on these chips hold an RTC, and other
	107	registers may add features such as NVRAM, a trickle charger for
	108	the RTC/NVRAM backup power, and alarms. This driver may not
	109	expose all those available chip features.
	110
	111	This driver can also be built as a module. If so, the module
	112	will be called rtc-ds1307.
	113
9bf5b4f5 AN	114	config RTC_DRV_DS1553
	115	tristate "Dallas DS1553"
	116	depends on RTC_CLASS
	117	help
	118	If you say yes here you get support for the
	119	Dallas DS1553 timekeeping chip.
	120
	121	This driver can also be built as a module. If so, the module
	122	will be called rtc-ds1553.
	123
edf1aaa3 AZ	124	config RTC_DRV_DS1672
	125	tristate "Dallas/Maxim DS1672"
	126	depends on RTC_CLASS && I2C
	127	help
	128	If you say yes here you get support for the
	129	Dallas/Maxim DS1672 timekeeping chip.
	130
	131	This driver can also be built as a module. If so, the module
	132	will be called rtc-ds1672.
	133
5ec3e4b7 AN	134	config RTC_DRV_DS1742
	135	tristate "Dallas DS1742"
	136	depends on RTC_CLASS
	137	help
	138	If you say yes here you get support for the
	139	Dallas DS1742 timekeeping chip.
	140
	141	This driver can also be built as a module. If so, the module
	142	will be called rtc-ds1742.
	143
b5a82d62 AZ	144	config RTC_DRV_PCF8563
	145	tristate "Philips PCF8563/Epson RTC8564"
	146	depends on RTC_CLASS && I2C
	147	help
	148	If you say yes here you get support for the
	149	Philips PCF8563 RTC chip. The Epson RTC8564
	150	should work as well.
	151
	152	This driver can also be built as a module. If so, the module
	153	will be called rtc-pcf8563.
	154
9c0c5705 L	155	config RTC_DRV_PCF8583
	156	tristate "Philips PCF8583"
	157	depends on RTC_CLASS && I2C
	158	help
	159	If you say yes here you get support for the
	160	Philips PCF8583 RTC chip.
	161
	162	This driver can also be built as a module. If so, the module
	163	will be called rtc-pcf8583.
	164
e0ac4761 AN	165	config RTC_DRV_RS5C348
	166	tristate "Ricoh RS5C348A/B"
	167	depends on RTC_CLASS && SPI
	168	help
	169	If you say yes here you get support for the
	170	Ricoh RS5C348A and RS5C348B RTC chips.
	171
	172	This driver can also be built as a module. If so, the module
	173	will be called rtc-rs5c348.
	174
7520b94d AZ	175	config RTC_DRV_RS5C372
	176	tristate "Ricoh RS5C372A/B"
	177	depends on RTC_CLASS && I2C
	178	help
	179	If you say yes here you get support for the
	180	Ricoh RS5C372A and RS5C372B RTC chips.
	181
	182	This driver can also be built as a module. If so, the module
	183	will be called rtc-rs5c372.
	184
1add6781 BD	185	config RTC_DRV_S3C
	186	tristate "Samsung S3C series SoC RTC"
	187	depends on RTC_CLASS && ARCH_S3C2410
	188	help
	189	RTC (Realtime Clock) driver for the clock inbuilt into the
	190	Samsung S3C24XX series of SoCs. This can provide periodic
	191	interrupt rates from 1Hz to 64Hz for user programs, and
	192	wakeup from Alarm.
	193
	194	The driver currently supports the common features on all the
	195	S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
	196	and S3C2442.
	197
	198	This driver can also be build as a module. If so, the module
	199	will be called rtc-s3c.
	200
1d98af87 AZ	201	config RTC_DRV_M48T86
	202	tristate "ST M48T86/Dallas DS12887"
	203	depends on RTC_CLASS
	204	help
	205	If you say Y here you will get support for the
	206	ST M48T86 and Dallas DS12887 RTC chips.
	207
	208	This driver can also be built as a module. If so, the module
	209	will be called rtc-m48t86.
	210
fd507e2f AZ	211	config RTC_DRV_EP93XX
	212	tristate "Cirrus Logic EP93XX"
	213	depends on RTC_CLASS && ARCH_EP93XX
	214	help
	215	If you say yes here you get support for the
	216	RTC embedded in the Cirrus Logic EP93XX processors.
	217
	218	This driver can also be built as a module. If so, the module
	219	will be called rtc-ep93xx.
	220
e842f1c8 RP	221	config RTC_DRV_SA1100
	222	tristate "SA11x0/PXA2xx"
	223	depends on RTC_CLASS && (ARCH_SA1100 \|\| ARCH_PXA)
	224	help
	225	If you say Y here you will get access to the real time clock
	226	built into your SA11x0 or PXA2xx CPU.
	227
	228	To compile this driver as a module, choose M here: the
	229	module will be called rtc-sa1100.
fd507e2f	230
8417eb7a	231	config RTC_DRV_VR41XX
3e16f6af	232	tristate "NEC VR41XX"
8417eb7a	233	depends on RTC_CLASS && CPU_VR41XX
3e16f6af AZ	234	help
	235	If you say Y here you will get access to the real time clock
	236	built into your NEC VR41XX CPU.
	237
	238	To compile this driver as a module, choose M here: the
	239	module will be called rtc-vr41xx.
8417eb7a	240
8ae6e163 DS	241	config RTC_DRV_PL031
	242	tristate "ARM AMBA PL031 RTC"
	243	depends on RTC_CLASS && ARM_AMBA
	244	help
	245	If you say Y here you will get access to ARM AMBA
	246	PrimeCell PL031 UART found on certain ARM SOCs.
	247
	248	To compile this driver as a module, choose M here: the
	249	module will be called rtc-pl031.
	250
788b1fc6 AV	251	config RTC_DRV_AT91
	252	tristate "AT91RM9200"
	253	depends on RTC_CLASS && ARCH_AT91RM9200
	254	help
	255	Driver for the Atmel AT91RM9200's internal RTC (Realtime Clock).
	256
a95579cd AZ	257	config RTC_DRV_TEST
	258	tristate "Test driver/device"
	259	depends on RTC_CLASS
	260	help
	261	If you say yes here you get support for the
	262	RTC test driver. It's a software RTC which can be
	263	used to test the RTC subsystem APIs. It gets
	264	the time from the system clock.
	265	You want this driver only if you are doing development
	266	on the RTC subsystem. Please read the source code
	267	for further details.
	268
	269	This driver can also be built as a module. If so, the module
	270	will be called rtc-test.
	271
8e12ecc2 RA	272	config RTC_DRV_MAX6902
	273	tristate "Maxim 6902"
	274	depends on RTC_CLASS && SPI
	275	help
	276	If you say yes here you will get support for the
	277	Maxim MAX6902 spi RTC chip.
	278
	279	This driver can also be built as a module. If so, the module
	280	will be called rtc-max6902.
	281
362600fe RA	282	config RTC_DRV_V3020
	283	tristate "EM Microelectronic V3020"
	284	depends on RTC_CLASS
	285	help
	286	If you say yes here you will get support for the
	287	EM Microelectronic v3020 RTC chip.
	288
	289	This driver can also be built as a module. If so, the module
	290	will be called rtc-v3020.
	291
0c86edc0	292	endmenu