drivers/rtc/Kconfig

   1 \#
   2 # RTC class/drivers configuration
   3 #
   4
   5 menu "Real Time Clock"
   6
   7 config RTC_LIB
   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
  18           probably want to enable one or more of the interfaces below.
  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 fsck 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 config RTC_DEBUG
  41         bool "RTC debug support"
  42         depends on RTC_CLASS = y
  43         help
  44           Say yes here to enable debugging support in the RTC framework
  45           and individual RTC drivers.
  46
  47 comment "RTC interfaces"
  48         depends on RTC_CLASS
  49
  50 config RTC_INTF_SYSFS
  51         tristate "sysfs"
  52         depends on RTC_CLASS && SYSFS
  53         default RTC_CLASS
  54         help
  55           Say yes here if you want to use your RTCs using sysfs interfaces,
  56           /sys/class/rtc/rtc0 through /sys/.../rtcN.
  57
  58           This driver can also be built as a module. If so, the module
  59           will be called rtc-sysfs.
  60
  61 config RTC_INTF_PROC
  62         tristate "proc"
  63         depends on RTC_CLASS && PROC_FS
  64         default RTC_CLASS
  65         help
  66           Say yes here if you want to use your first RTC through the proc
  67           interface, /proc/driver/rtc.  Other RTCs will not be available
  68           through that API.
  69
  70           This driver can also be built as a module. If so, the module
  71           will be called rtc-proc.
  72
  73 config RTC_INTF_DEV
  74         tristate "dev"
  75         depends on RTC_CLASS
  76         default RTC_CLASS
  77         help
  78           Say yes here if you want to use your RTCs using the /dev
  79           interfaces, which "udev" sets up as /dev/rtc0 through
  80           /dev/rtcN.  You may want to set up a symbolic link so one
  81           of these can be accessed as /dev/rtc, which is a name
  82           expected by "hwclock" and some other programs.
  83
  84           This driver can also be built as a module. If so, the module
  85           will be called rtc-dev.
  86
  87 config RTC_INTF_DEV_UIE_EMUL
  88         bool "RTC UIE emulation on dev interface"
  89         depends on RTC_INTF_DEV
  90         help
  91           Provides an emulation for RTC_UIE if the underlaying rtc chip
  92           driver does not expose RTC_UIE ioctls.  Those requests generate
  93           once-per-second update interrupts, used for synchronization.
  94
  95 comment "RTC drivers"
  96         depends on RTC_CLASS
  97
  98 config RTC_DRV_X1205
  99         tristate "Xicor/Intersil X1205"
 100         depends on RTC_CLASS && I2C
 101         help
 102           If you say yes here you get support for the
 103           Xicor/Intersil X1205 RTC chip.
 104
 105           This driver can also be built as a module. If so, the module
 106           will be called rtc-x1205.
 107
 108 config RTC_DRV_DS1307
 109         tristate "Dallas/Maxim DS1307 and similar I2C RTC chips"
 110         depends on RTC_CLASS && I2C
 111         help
 112           If you say yes here you get support for various compatible RTC
 113           chips (often with battery backup) connected with I2C.  This driver
 114           should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
 115           and probably other chips.  In some cases the RTC must already
 116           have been initialized (by manufacturing or a bootloader).
 117
 118           The first seven registers on these chips hold an RTC, and other
 119           registers may add features such as NVRAM, a trickle charger for
 120           the RTC/NVRAM backup power, and alarms.  This driver may not
 121           expose all those available chip features.
 122
 123           This driver can also be built as a module. If so, the module
 124           will be called rtc-ds1307.
 125
 126 config RTC_DRV_DS1553
 127         tristate "Dallas DS1553"
 128         depends on RTC_CLASS
 129         help
 130           If you say yes here you get support for the
 131           Dallas DS1553 timekeeping chip.
 132
 133           This driver can also be built as a module. If so, the module
 134           will be called rtc-ds1553.
 135
 136 config RTC_DRV_ISL1208
 137         tristate "Intersil 1208"
 138         depends on RTC_CLASS && I2C
 139         help
 140           If you say yes here you get support for the
 141           Intersil 1208 RTC chip.
 142
 143           This driver can also be built as a module. If so, the module
 144           will be called rtc-isl1208.
 145
 146 config RTC_DRV_DS1672
 147         tristate "Dallas/Maxim DS1672"
 148         depends on RTC_CLASS && I2C
 149         help
 150           If you say yes here you get support for the
 151           Dallas/Maxim DS1672 timekeeping chip.
 152
 153           This driver can also be built as a module. If so, the module
 154           will be called rtc-ds1672.
 155
 156 config RTC_DRV_DS1742
 157         tristate "Dallas DS1742/1743"
 158         depends on RTC_CLASS
 159         help
 160           If you say yes here you get support for the
 161           Dallas DS1742/1743 timekeeping chip.
 162
 163           This driver can also be built as a module. If so, the module
 164           will be called rtc-ds1742.
 165
 166 config RTC_DRV_OMAP
 167         tristate "TI OMAP1"
 168         depends on RTC_CLASS && ( \
 169                 ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 )
 170         help
 171           Say "yes" here to support the real time clock on TI OMAP1 chips.
 172           This driver can also be built as a module called rtc-omap.
 173
 174 config RTC_DRV_PCF8563
 175         tristate "Philips PCF8563/Epson RTC8564"
 176         depends on RTC_CLASS && I2C
 177         help
 178           If you say yes here you get support for the
 179           Philips PCF8563 RTC chip. The Epson RTC8564
 180           should work as well.
 181
 182           This driver can also be built as a module. If so, the module
 183           will be called rtc-pcf8563.
 184
 185 config RTC_DRV_PCF8583
 186         tristate "Philips PCF8583"
 187         depends on RTC_CLASS && I2C
 188         help
 189           If you say yes here you get support for the
 190           Philips PCF8583 RTC chip.
 191
 192           This driver can also be built as a module. If so, the module
 193           will be called rtc-pcf8583.
 194
 195 config RTC_DRV_RS5C348
 196         tristate "Ricoh RS5C348A/B"
 197         depends on RTC_CLASS && SPI
 198         help
 199           If you say yes here you get support for the
 200           Ricoh RS5C348A and RS5C348B RTC chips.
 201
 202           This driver can also be built as a module. If so, the module
 203           will be called rtc-rs5c348.
 204
 205 config RTC_DRV_RS5C372
 206         tristate "Ricoh RS5C372A/B"
 207         depends on RTC_CLASS && I2C
 208         help
 209           If you say yes here you get support for the
 210           Ricoh RS5C372A and RS5C372B RTC chips.
 211
 212           This driver can also be built as a module. If so, the module
 213           will be called rtc-rs5c372.
 214
 215 config RTC_DRV_S3C
 216         tristate "Samsung S3C series SoC RTC"
 217         depends on RTC_CLASS && ARCH_S3C2410
 218         help
 219           RTC (Realtime Clock) driver for the clock inbuilt into the
 220           Samsung S3C24XX series of SoCs. This can provide periodic
 221           interrupt rates from 1Hz to 64Hz for user programs, and
 222           wakeup from Alarm.
 223
 224           The driver currently supports the common features on all the
 225           S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
 226           and S3C2442.
 227
 228           This driver can also be build as a module. If so, the module
 229           will be called rtc-s3c.
 230
 231 config RTC_DRV_M48T86
 232         tristate "ST M48T86/Dallas DS12887"
 233         depends on RTC_CLASS
 234         help
 235           If you say Y here you will get support for the
 236           ST M48T86 and Dallas DS12887 RTC chips.
 237
 238           This driver can also be built as a module. If so, the module
 239           will be called rtc-m48t86.
 240
 241 config RTC_DRV_EP93XX
 242         tristate "Cirrus Logic EP93XX"
 243         depends on RTC_CLASS && ARCH_EP93XX
 244         help
 245           If you say yes here you get support for the
 246           RTC embedded in the Cirrus Logic EP93XX processors.
 247
 248           This driver can also be built as a module. If so, the module
 249           will be called rtc-ep93xx.
 250
 251 config RTC_DRV_SA1100
 252         tristate "SA11x0/PXA2xx"
 253         depends on RTC_CLASS && (ARCH_SA1100 || ARCH_PXA)
 254         help
 255           If you say Y here you will get access to the real time clock
 256           built into your SA11x0 or PXA2xx CPU.
 257
 258           To compile this driver as a module, choose M here: the
 259           module will be called rtc-sa1100.
 260
 261 config RTC_DRV_SH
 262         tristate "SuperH On-Chip RTC"
 263         depends on RTC_CLASS && SUPERH
 264         help
 265           Say Y here to enable support for the on-chip RTC found in
 266           most SuperH processors.
 267
 268           To compile this driver as a module, choose M here: the
 269           module will be called rtc-sh.
 270
 271 config RTC_DRV_VR41XX
 272         tristate "NEC VR41XX"
 273         depends on RTC_CLASS && CPU_VR41XX
 274         help
 275           If you say Y here you will get access to the real time clock
 276           built into your NEC VR41XX CPU.
 277
 278           To compile this driver as a module, choose M here: the
 279           module will be called rtc-vr41xx.
 280
 281 config RTC_DRV_PL031
 282         tristate "ARM AMBA PL031 RTC"
 283         depends on RTC_CLASS && ARM_AMBA
 284         help
 285           If you say Y here you will get access to ARM AMBA
 286           PrimeCell PL031 UART found on certain ARM SOCs.
 287
 288           To compile this driver as a module, choose M here: the
 289           module will be called rtc-pl031.
 290
 291 config RTC_DRV_AT91RM9200
 292         tristate "AT91RM9200"
 293         depends on RTC_CLASS && ARCH_AT91RM9200
 294         help
 295           Driver for the Atmel AT91RM9200's internal RTC (Realtime Clock).
 296
 297 config RTC_DRV_TEST
 298         tristate "Test driver/device"
 299         depends on RTC_CLASS
 300         help
 301           If you say yes here you get support for the
 302           RTC test driver. It's a software RTC which can be
 303           used to test the RTC subsystem APIs. It gets
 304           the time from the system clock.
 305           You want this driver only if you are doing development
 306           on the RTC subsystem. Please read the source code
 307           for further details.
 308
 309           This driver can also be built as a module. If so, the module
 310           will be called rtc-test.
 311
 312 config RTC_DRV_MAX6902
 313         tristate "Maxim 6902"
 314         depends on RTC_CLASS && SPI
 315         help
 316           If you say yes here you will get support for the
 317           Maxim MAX6902 spi RTC chip.
 318
 319           This driver can also be built as a module. If so, the module
 320           will be called rtc-max6902.
 321
 322 config RTC_DRV_V3020
 323         tristate "EM Microelectronic V3020"
 324         depends on RTC_CLASS
 325         help
 326           If you say yes here you will get support for the
 327           EM Microelectronic v3020 RTC chip.
 328
 329           This driver can also be built as a module. If so, the module
 330           will be called rtc-v3020.
 331
 332 endmenu