1# 2# RTC class/drivers configuration 3# 4 5menu "Real Time Clock" 6 depends on !S390 7 8config RTC_LIB 9 tristate 10 11config RTC_CLASS 12 tristate "RTC class" 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 23config RTC_HCTOSYS 24 bool "Set system time from RTC on startup and resume" 25 depends on RTC_CLASS = y 26 default y 27 help 28 If you say yes here, the system time (wall clock) will be set using 29 the value read from a specified RTC device. This is useful to avoid 30 unnecessary fsck runs at boot time, and to network better. 31 32config RTC_HCTOSYS_DEVICE 33 string "RTC used to set the system time" 34 depends on RTC_HCTOSYS = y 35 default "rtc0" 36 help 37 The RTC device that will be used to (re)initialize the system 38 clock, usually rtc0. Initialization is done when the system 39 starts up, and when it resumes from a low power state. 40 41 This clock should be battery-backed, so that it reads the correct 42 time when the system boots from a power-off state. Otherwise, your 43 system will need an external clock source (like an NTP server). 44 45 If the clock you specify here is not battery backed, it may still 46 be useful to reinitialize system time when resuming from system 47 sleep states. Do not specify an RTC here unless it stays powered 48 during all this system's supported sleep states. 49 50config RTC_DEBUG 51 bool "RTC debug support" 52 depends on RTC_CLASS = y 53 help 54 Say yes here to enable debugging support in the RTC framework 55 and individual RTC drivers. 56 57comment "RTC interfaces" 58 depends on RTC_CLASS 59 60config RTC_INTF_SYSFS 61 boolean "/sys/class/rtc/rtcN (sysfs)" 62 depends on RTC_CLASS && SYSFS 63 default RTC_CLASS 64 help 65 Say yes here if you want to use your RTCs using sysfs interfaces, 66 /sys/class/rtc/rtc0 through /sys/.../rtcN. 67 68 This driver can also be built as a module. If so, the module 69 will be called rtc-sysfs. 70 71config RTC_INTF_PROC 72 boolean "/proc/driver/rtc (procfs for rtc0)" 73 depends on RTC_CLASS && PROC_FS 74 default RTC_CLASS 75 help 76 Say yes here if you want to use your first RTC through the proc 77 interface, /proc/driver/rtc. Other RTCs will not be available 78 through that API. 79 80 This driver can also be built as a module. If so, the module 81 will be called rtc-proc. 82 83config RTC_INTF_DEV 84 boolean "/dev/rtcN (character devices)" 85 depends on RTC_CLASS 86 default RTC_CLASS 87 help 88 Say yes here if you want to use your RTCs using the /dev 89 interfaces, which "udev" sets up as /dev/rtc0 through 90 /dev/rtcN. You may want to set up a symbolic link so one 91 of these can be accessed as /dev/rtc, which is a name 92 expected by "hwclock" and some other programs. 93 94 This driver can also be built as a module. If so, the module 95 will be called rtc-dev. 96 97config RTC_INTF_DEV_UIE_EMUL 98 bool "RTC UIE emulation on dev interface" 99 depends on RTC_INTF_DEV 100 help 101 Provides an emulation for RTC_UIE if the underlying rtc chip 102 driver does not expose RTC_UIE ioctls. Those requests generate 103 once-per-second update interrupts, used for synchronization. 104 105config RTC_DRV_TEST 106 tristate "Test driver/device" 107 depends on RTC_CLASS 108 help 109 If you say yes here you get support for the 110 RTC test driver. It's a software RTC which can be 111 used to test the RTC subsystem APIs. It gets 112 the time from the system clock. 113 You want this driver only if you are doing development 114 on the RTC subsystem. Please read the source code 115 for further details. 116 117 This driver can also be built as a module. If so, the module 118 will be called rtc-test. 119 120comment "I2C RTC drivers" 121 depends on RTC_CLASS && I2C 122 123config RTC_DRV_DS1307 124 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00" 125 depends on RTC_CLASS && I2C 126 help 127 If you say yes here you get support for various compatible RTC 128 chips (often with battery backup) connected with I2C. This driver 129 should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00, 130 and probably other chips. In some cases the RTC must already 131 have been initialized (by manufacturing or a bootloader). 132 133 The first seven registers on these chips hold an RTC, and other 134 registers may add features such as NVRAM, a trickle charger for 135 the RTC/NVRAM backup power, and alarms. This driver may not 136 expose all those available chip features. 137 138 This driver can also be built as a module. If so, the module 139 will be called rtc-ds1307. 140 141config RTC_DRV_DS1672 142 tristate "Dallas/Maxim DS1672" 143 depends on RTC_CLASS && I2C 144 help 145 If you say yes here you get support for the 146 Dallas/Maxim DS1672 timekeeping chip. 147 148 This driver can also be built as a module. If so, the module 149 will be called rtc-ds1672. 150 151config RTC_DRV_MAX6900 152 tristate "Maxim 6900" 153 depends on RTC_CLASS && I2C 154 help 155 If you say yes here you will get support for the 156 Maxim MAX6900 I2C RTC chip. 157 158 This driver can also be built as a module. If so, the module 159 will be called rtc-max6900. 160 161config RTC_DRV_RS5C372 162 tristate "Ricoh RS5C372A/B, RV5C386, RV5C387A" 163 depends on RTC_CLASS && I2C 164 help 165 If you say yes here you get support for the 166 Ricoh RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips. 167 168 This driver can also be built as a module. If so, the module 169 will be called rtc-rs5c372. 170 171config RTC_DRV_ISL1208 172 tristate "Intersil 1208" 173 depends on RTC_CLASS && I2C 174 help 175 If you say yes here you get support for the 176 Intersil 1208 RTC chip. 177 178 This driver can also be built as a module. If so, the module 179 will be called rtc-isl1208. 180 181config RTC_DRV_X1205 182 tristate "Xicor/Intersil X1205" 183 depends on RTC_CLASS && I2C 184 help 185 If you say yes here you get support for the 186 Xicor/Intersil X1205 RTC chip. 187 188 This driver can also be built as a module. If so, the module 189 will be called rtc-x1205. 190 191config RTC_DRV_PCF8563 192 tristate "Philips PCF8563/Epson RTC8564" 193 depends on RTC_CLASS && I2C 194 help 195 If you say yes here you get support for the 196 Philips PCF8563 RTC chip. The Epson RTC8564 197 should work as well. 198 199 This driver can also be built as a module. If so, the module 200 will be called rtc-pcf8563. 201 202config RTC_DRV_PCF8583 203 tristate "Philips PCF8583" 204 depends on RTC_CLASS && I2C 205 help 206 If you say yes here you get support for the Philips PCF8583 207 RTC chip found on Acorn RiscPCs. This driver supports the 208 platform specific method of retrieving the current year from 209 the RTC's SRAM. It will work on other platforms with the same 210 chip, but the year will probably have to be tweaked. 211 212 This driver can also be built as a module. If so, the module 213 will be called rtc-pcf8583. 214 215config RTC_DRV_M41T80 216 tristate "ST M41T80 series RTC" 217 depends on RTC_CLASS && I2C 218 help 219 If you say Y here you will get support for the 220 ST M41T80 RTC chips series. Currently following chips are 221 supported: M41T80, M41T81, M41T82, M41T83, M41ST84, M41ST85 222 and M41ST87. 223 224 This driver can also be built as a module. If so, the module 225 will be called rtc-m41t80. 226 227config RTC_DRV_M41T80_WDT 228 bool "ST M41T80 series RTC watchdog timer" 229 depends on RTC_DRV_M41T80 230 help 231 If you say Y here you will get support for the 232 watchdog timer in ST M41T80 RTC chips series. 233 234config RTC_DRV_TWL92330 235 boolean "TI TWL92330/Menelaus" 236 depends on RTC_CLASS && I2C && MENELAUS 237 help 238 If you say yes here you get support for the RTC on the 239 TWL92330 "Menelaus" power mangement chip, used with OMAP2 240 platforms. The support is integrated with the rest of 241 the Menelaus driver; it's not separate module. 242 243comment "SPI RTC drivers" 244 depends on RTC_CLASS && SPI_MASTER 245 246config RTC_DRV_RS5C348 247 tristate "Ricoh RS5C348A/B" 248 depends on RTC_CLASS && SPI_MASTER 249 help 250 If you say yes here you get support for the 251 Ricoh RS5C348A and RS5C348B RTC chips. 252 253 This driver can also be built as a module. If so, the module 254 will be called rtc-rs5c348. 255 256config RTC_DRV_MAX6902 257 tristate "Maxim 6902" 258 depends on RTC_CLASS && SPI_MASTER 259 help 260 If you say yes here you will get support for the 261 Maxim MAX6902 SPI RTC chip. 262 263 This driver can also be built as a module. If so, the module 264 will be called rtc-max6902. 265 266comment "Platform RTC drivers" 267 depends on RTC_CLASS 268 269# this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h> 270# requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a 271# global rtc_lock ... it's not yet just another platform_device. 272 273config RTC_DRV_CMOS 274 tristate "PC-style 'CMOS'" 275 depends on RTC_CLASS && (X86 || ALPHA || ARM26 || ARM \ 276 || M32R || ATARI || PPC || MIPS) 277 help 278 Say "yes" here to get direct support for the real time clock 279 found in every PC or ACPI-based system, and some other boards. 280 Specifically the original MC146818, compatibles like those in 281 PC south bridges, the DS12887 or M48T86, some multifunction 282 or LPC bus chips, and so on. 283 284 Your system will need to define the platform device used by 285 this driver, otherwise it won't be accessible. This means 286 you can safely enable this driver if you don't know whether 287 or not your board has this kind of hardware. 288 289 This driver can also be built as a module. If so, the module 290 will be called rtc-cmos. 291 292config RTC_DRV_DS1216 293 tristate "Dallas DS1216" 294 depends on RTC_CLASS && SNI_RM 295 help 296 If you say yes here you get support for the Dallas DS1216 RTC chips. 297 298config RTC_DRV_DS1553 299 tristate "Dallas DS1553" 300 depends on RTC_CLASS 301 help 302 If you say yes here you get support for the 303 Dallas DS1553 timekeeping chip. 304 305 This driver can also be built as a module. If so, the module 306 will be called rtc-ds1553. 307 308config RTC_DRV_DS1742 309 tristate "Dallas DS1742/1743" 310 depends on RTC_CLASS 311 help 312 If you say yes here you get support for the 313 Dallas DS1742/1743 timekeeping chip. 314 315 This driver can also be built as a module. If so, the module 316 will be called rtc-ds1742. 317 318config RTC_DRV_M48T86 319 tristate "ST M48T86/Dallas DS12887" 320 depends on RTC_CLASS 321 help 322 If you say Y here you will get support for the 323 ST M48T86 and Dallas DS12887 RTC chips. 324 325 This driver can also be built as a module. If so, the module 326 will be called rtc-m48t86. 327 328config RTC_DRV_M48T59 329 tristate "ST M48T59" 330 depends on RTC_CLASS 331 help 332 If you say Y here you will get support for the 333 ST M48T59 RTC chip. 334 335 This driver can also be built as a module, if so, the module 336 will be called "rtc-m48t59". 337 338config RTC_DRV_V3020 339 tristate "EM Microelectronic V3020" 340 depends on RTC_CLASS 341 help 342 If you say yes here you will get support for the 343 EM Microelectronic v3020 RTC chip. 344 345 This driver can also be built as a module. If so, the module 346 will be called rtc-v3020. 347 348comment "on-CPU RTC drivers" 349 depends on RTC_CLASS 350 351config RTC_DRV_OMAP 352 tristate "TI OMAP1" 353 depends on RTC_CLASS && ( \ 354 ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 ) 355 help 356 Say "yes" here to support the real time clock on TI OMAP1 chips. 357 This driver can also be built as a module called rtc-omap. 358 359config RTC_DRV_S3C 360 tristate "Samsung S3C series SoC RTC" 361 depends on RTC_CLASS && ARCH_S3C2410 362 help 363 RTC (Realtime Clock) driver for the clock inbuilt into the 364 Samsung S3C24XX series of SoCs. This can provide periodic 365 interrupt rates from 1Hz to 64Hz for user programs, and 366 wakeup from Alarm. 367 368 The driver currently supports the common features on all the 369 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440 370 and S3C2442. 371 372 This driver can also be build as a module. If so, the module 373 will be called rtc-s3c. 374 375config RTC_DRV_EP93XX 376 tristate "Cirrus Logic EP93XX" 377 depends on RTC_CLASS && ARCH_EP93XX 378 help 379 If you say yes here you get support for the 380 RTC embedded in the Cirrus Logic EP93XX processors. 381 382 This driver can also be built as a module. If so, the module 383 will be called rtc-ep93xx. 384 385config RTC_DRV_SA1100 386 tristate "SA11x0/PXA2xx" 387 depends on RTC_CLASS && (ARCH_SA1100 || ARCH_PXA) 388 help 389 If you say Y here you will get access to the real time clock 390 built into your SA11x0 or PXA2xx CPU. 391 392 To compile this driver as a module, choose M here: the 393 module will be called rtc-sa1100. 394 395config RTC_DRV_SH 396 tristate "SuperH On-Chip RTC" 397 depends on RTC_CLASS && SUPERH 398 help 399 Say Y here to enable support for the on-chip RTC found in 400 most SuperH processors. 401 402 To compile this driver as a module, choose M here: the 403 module will be called rtc-sh. 404 405config RTC_DRV_VR41XX 406 tristate "NEC VR41XX" 407 depends on RTC_CLASS && CPU_VR41XX 408 help 409 If you say Y here you will get access to the real time clock 410 built into your NEC VR41XX CPU. 411 412 To compile this driver as a module, choose M here: the 413 module will be called rtc-vr41xx. 414 415config RTC_DRV_PL031 416 tristate "ARM AMBA PL031 RTC" 417 depends on RTC_CLASS && ARM_AMBA 418 help 419 If you say Y here you will get access to ARM AMBA 420 PrimeCell PL031 RTC found on certain ARM SOCs. 421 422 To compile this driver as a module, choose M here: the 423 module will be called rtc-pl031. 424 425config RTC_DRV_AT32AP700X 426 tristate "AT32AP700X series RTC" 427 depends on RTC_CLASS && PLATFORM_AT32AP 428 help 429 Driver for the internal RTC (Realtime Clock) on Atmel AVR32 430 AT32AP700x family processors. 431 432config RTC_DRV_AT91RM9200 433 tristate "AT91RM9200" 434 depends on RTC_CLASS && ARCH_AT91RM9200 435 help 436 Driver for the Atmel AT91RM9200's internal RTC (Realtime Clock). 437 438config RTC_DRV_BFIN 439 tristate "Blackfin On-Chip RTC" 440 depends on RTC_CLASS && BFIN 441 help 442 If you say yes here you will get support for the 443 Blackfin On-Chip Real Time Clock. 444 445 This driver can also be built as a module. If so, the module 446 will be called rtc-bfin. 447 448config RTC_DRV_RS5C313 449 tristate "Ricoh RS5C313" 450 depends on RTC_CLASS && SH_LANDISK 451 help 452 If you say yes here you get support for the Ricoh RS5C313 RTC chips. 453 454endmenu 455