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 of 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 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
  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
  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
  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
  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
  83 comment "RTC drivers"
  84         depends on RTC_CLASS
  85
  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
  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
 114 config RTC_DRV_DS1672
 115         tristate "Dallas/Maxim DS1672"
 116         depends on RTC_CLASS && I2C
 117         help
 118           If you say yes here you get support for the
 119           Dallas/Maxim DS1672 timekeeping chip.
 120
 121           This driver can also be built as a module. If so, the module
 122           will be called rtc-ds1672.
 123
 124 config RTC_DRV_PCF8563
 125         tristate "Philips PCF8563/Epson RTC8564"
 126         depends on RTC_CLASS && I2C
 127         help
 128           If you say yes here you get support for the
 129           Philips PCF8563 RTC chip. The Epson RTC8564
 130           should work as well.
 131
 132           This driver can also be built as a module. If so, the module
 133           will be called rtc-pcf8563.
 134
 135 config RTC_DRV_PCF8583
 136         tristate "Philips PCF8583"
 137         depends on RTC_CLASS && I2C
 138         help
 139           If you say yes here you get support for the
 140           Philips PCF8583 RTC chip.
 141
 142           This driver can also be built as a module. If so, the module
 143           will be called rtc-pcf8583.
 144
 145 config RTC_DRV_RS5C372
 146         tristate "Ricoh RS5C372A/B"
 147         depends on RTC_CLASS && I2C
 148         help
 149           If you say yes here you get support for the
 150           Ricoh RS5C372A and RS5C372B RTC chips.
 151
 152           This driver can also be built as a module. If so, the module
 153           will be called rtc-rs5c372.
 154
 155 config RTC_DRV_M48T86
 156         tristate "ST M48T86/Dallas DS12887"
 157         depends on RTC_CLASS
 158         help
 159           If you say Y here you will get support for the
 160           ST M48T86 and Dallas DS12887 RTC chips.
 161
 162           This driver can also be built as a module. If so, the module
 163           will be called rtc-m48t86.
 164
 165 config RTC_DRV_EP93XX
 166         tristate "Cirrus Logic EP93XX"
 167         depends on RTC_CLASS && ARCH_EP93XX
 168         help
 169           If you say yes here you get support for the
 170           RTC embedded in the Cirrus Logic EP93XX processors.
 171
 172           This driver can also be built as a module. If so, the module
 173           will be called rtc-ep93xx.
 174
 175 config RTC_DRV_SA1100
 176         tristate "SA11x0/PXA2xx"
 177         depends on RTC_CLASS && (ARCH_SA1100 || ARCH_PXA)
 178         help
 179           If you say Y here you will get access to the real time clock
 180           built into your SA11x0 or PXA2xx CPU.
 181
 182           To compile this driver as a module, choose M here: the
 183           module will be called rtc-sa1100.
 184
 185 config RTC_DRV_VR41XX
 186         tristate "NEC VR41XX"
 187         depends on RTC_CLASS && CPU_VR41XX
 188         help
 189           If you say Y here you will get access to the real time clock
 190           built into your NEC VR41XX CPU.
 191
 192           To compile this driver as a module, choose M here: the
 193           module will be called rtc-vr41xx.
 194
 195 config RTC_DRV_PL031
 196         tristate "ARM AMBA PL031 RTC"
 197         depends on RTC_CLASS && ARM_AMBA
 198         help
 199           If you say Y here you will get access to ARM AMBA
 200           PrimeCell PL031 UART found on certain ARM SOCs.
 201
 202           To compile this driver as a module, choose M here: the
 203           module will be called rtc-pl031.
 204
 205 config RTC_DRV_AT91
 206         tristate "AT91RM9200"
 207         depends on RTC_CLASS && ARCH_AT91RM9200
 208         help
 209           Driver for the Atmel AT91RM9200's internal RTC (Realtime Clock).
 210
 211 config RTC_DRV_TEST
 212         tristate "Test driver/device"
 213         depends on RTC_CLASS
 214         help
 215           If you say yes here you get support for the
 216           RTC test driver. It's a software RTC which can be
 217           used to test the RTC subsystem APIs. It gets
 218           the time from the system clock.
 219           You want this driver only if you are doing development
 220           on the RTC subsystem. Please read the source code
 221           for further details.
 222
 223           This driver can also be built as a module. If so, the module
 224           will be called rtc-test.
 225
 226 config RTC_DRV_MAX6902
 227         tristate "Maxim 6902"
 228         depends on RTC_CLASS && SPI
 229         help
 230           If you say yes here you will get support for the
 231           Maxim MAX6902 spi RTC chip.
 232
 233           This driver can also be built as a module. If so, the module
 234           will be called rtc-max6902.
 235
 236 config RTC_DRV_V3020
 237         tristate "EM Microelectronic V3020"
 238         depends on RTC_CLASS
 239         help
 240           If you say yes here you will get support for the
 241           EM Microelectronic v3020 RTC chip.
 242
 243           This driver can also be built as a module. If so, the module
 244           will be called rtc-v3020.
 245
 246 endmenu