diff options
Diffstat (limited to 'drivers/rtc/Kconfig')
| -rw-r--r-- | drivers/rtc/Kconfig | 275 |
1 files changed, 161 insertions, 114 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 95826b92ca4b..4e4c10a7fd3a 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -3,6 +3,7 @@ # menu "Real Time Clock" + depends on !S390 config RTC_LIB tristate @@ -21,21 +22,31 @@ config RTC_CLASS will be called rtc-class. config RTC_HCTOSYS - bool "Set system time from RTC on startup" + bool "Set system time from RTC on startup and resume" 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 fsck runs. + If you say yes here, the system time (wall clock) will be set using + the value read from a specified RTC device. This is useful to avoid + unnecessary fsck runs at boot time, and to network better. config RTC_HCTOSYS_DEVICE - string "The RTC to read the time from" + string "RTC used to set the system time" depends on RTC_HCTOSYS = y default "rtc0" help - The RTC device that will be used as the source for - the system time, usually rtc0. + The RTC device that will be used to (re)initialize the system + clock, usually rtc0. Initialization is done when the system + starts up, and when it resumes from a low power state. + + This clock should be battery-backed, so that it reads the correct + time when the system boots from a power-off state. Otherwise, your + system will need an external clock source (like an NTP server). + + If the clock you specify here is not battery backed, it may still + be useful to reinitialize system time when resuming from system + sleep states. Do not specify an RTC here unless it stays powered + during all this system's supported sleep states. config RTC_DEBUG bool "RTC debug support" @@ -48,7 +59,7 @@ comment "RTC interfaces" depends on RTC_CLASS config RTC_INTF_SYSFS - tristate "sysfs" + boolean "/sys/class/rtc/rtcN (sysfs)" depends on RTC_CLASS && SYSFS default RTC_CLASS help @@ -59,7 +70,7 @@ config RTC_INTF_SYSFS will be called rtc-sysfs. config RTC_INTF_PROC - tristate "proc" + boolean "/proc/driver/rtc (procfs for rtc0)" depends on RTC_CLASS && PROC_FS default RTC_CLASS help @@ -71,7 +82,7 @@ config RTC_INTF_PROC will be called rtc-proc. config RTC_INTF_DEV - tristate "dev" + boolean "/dev/rtcN (character devices)" depends on RTC_CLASS default RTC_CLASS help @@ -88,48 +99,30 @@ 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 + Provides an emulation for RTC_UIE if the underlying rtc chip driver does not expose RTC_UIE ioctls. Those requests generate once-per-second update interrupts, used for synchronization. -comment "RTC drivers" +config RTC_DRV_TEST + tristate "Test driver/device" depends on RTC_CLASS - -# this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h> -# requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a -# global rtc_lock ... it's not yet just another platform_device. - -config RTC_DRV_CMOS - tristate "PC-style 'CMOS' real time clock" - depends on RTC_CLASS && (X86 || ALPHA || ARM26 || ARM \ - || M32R || ATARI || POWERPC) - help - Say "yes" here to get direct support for the real time clock - found in every PC or ACPI-based system, and some other boards. - Specifically the original MC146818, compatibles like those in - PC south bridges, the DS12887 or M48T86, some multifunction - or LPC bus chips, and so on. - - Your system will need to define the platform device used by - this driver, otherwise it won't be accessible. This means - you can safely enable this driver if you don't know whether - or not your board has this kind of hardware. - - This driver can also be built as a module. If so, the module - will be called rtc-cmos. - -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. + 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-x1205. + will be called rtc-test. + +comment "I2C RTC drivers" + depends on RTC_CLASS config RTC_DRV_DS1307 - tristate "Dallas/Maxim DS1307 and similar I2C RTC chips" + tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00" depends on RTC_CLASS && I2C help If you say yes here you get support for various compatible RTC @@ -146,53 +139,55 @@ config RTC_DRV_DS1307 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 +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 DS1553 timekeeping chip. + Dallas/Maxim DS1672 timekeeping chip. This driver can also be built as a module. If so, the module - will be called rtc-ds1553. + will be called rtc-ds1672. -config RTC_DRV_ISL1208 - tristate "Intersil 1208" +config RTC_DRV_MAX6900 + tristate "Maxim 6900" depends on RTC_CLASS && I2C help - If you say yes here you get support for the - Intersil 1208 RTC chip. + If you say yes here you will get support for the + Maxim MAX6900 I2C RTC chip. This driver can also be built as a module. If so, the module - will be called rtc-isl1208. + will be called rtc-max6900. -config RTC_DRV_DS1672 - tristate "Dallas/Maxim DS1672" +config RTC_DRV_RS5C372 + tristate "Ricoh RS5C372A/B" depends on RTC_CLASS && I2C help If you say yes here you get support for the - Dallas/Maxim DS1672 timekeeping chip. + Ricoh RS5C372A and RS5C372B RTC chips. This driver can also be built as a module. If so, the module - will be called rtc-ds1672. + will be called rtc-rs5c372. -config RTC_DRV_DS1742 - tristate "Dallas DS1742/1743" - depends on RTC_CLASS +config RTC_DRV_ISL1208 + tristate "Intersil 1208" + depends on RTC_CLASS && I2C help If you say yes here you get support for the - Dallas DS1742/1743 timekeeping chip. + Intersil 1208 RTC chip. This driver can also be built as a module. If so, the module - will be called rtc-ds1742. + will be called rtc-isl1208. -config RTC_DRV_OMAP - tristate "TI OMAP1" - depends on RTC_CLASS && ( \ - ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 ) +config RTC_DRV_X1205 + tristate "Xicor/Intersil X1205" + depends on RTC_CLASS && I2C help - Say "yes" here to support the real time clock on TI OMAP1 chips. - This driver can also be built as a module called rtc-omap. + 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_PCF8563 tristate "Philips PCF8563/Epson RTC8564" @@ -207,16 +202,20 @@ config RTC_DRV_PCF8563 config RTC_DRV_PCF8583 tristate "Philips PCF8583" - depends on RTC_CLASS && I2C && ARCH_RPC + depends on RTC_CLASS && I2C help If you say yes here you get support for the Philips PCF8583 - RTC chip found on Acorn RiscPCs. This driver supports the + RTC chip found on Acorn RiscPCs. This driver supports the platform specific method of retrieving the current year from - the RTC's SRAM. + the RTC's SRAM. It will work on other platforms with the same + chip, but the year will probably have to be tweaked. This driver can also be built as a module. If so, the module will be called rtc-pcf8583. +comment "SPI RTC drivers" + depends on RTC_CLASS + config RTC_DRV_RS5C348 tristate "Ricoh RS5C348A/B" depends on RTC_CLASS && SPI @@ -227,15 +226,92 @@ config RTC_DRV_RS5C348 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 +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. + +comment "Platform RTC drivers" + depends on RTC_CLASS + +# this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h> +# requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a +# global rtc_lock ... it's not yet just another platform_device. + +config RTC_DRV_CMOS + tristate "PC-style 'CMOS'" + depends on RTC_CLASS && (X86 || ALPHA || ARM26 || ARM \ + || M32R || ATARI || POWERPC || MIPS) + help + Say "yes" here to get direct support for the real time clock + found in every PC or ACPI-based system, and some other boards. + Specifically the original MC146818, compatibles like those in + PC south bridges, the DS12887 or M48T86, some multifunction + or LPC bus chips, and so on. + + Your system will need to define the platform device used by + this driver, otherwise it won't be accessible. This means + you can safely enable this driver if you don't know whether + or not your board has this kind of hardware. + + This driver can also be built as a module. If so, the module + will be called rtc-cmos. + +config RTC_DRV_DS1553 + tristate "Dallas DS1553" + depends on RTC_CLASS help If you say yes here you get support for the - Ricoh RS5C372A and RS5C372B RTC chips. + Dallas DS1553 timekeeping chip. This driver can also be built as a module. If so, the module - will be called rtc-rs5c372. + will be called rtc-ds1553. + +config RTC_DRV_DS1742 + tristate "Dallas DS1742/1743" + depends on RTC_CLASS + help + If you say yes here you get support for the + Dallas DS1742/1743 timekeeping chip. + + This driver can also be built as a module. If so, the module + will be called rtc-ds1742. + +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_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. + +comment "on-CPU RTC drivers" + depends on RTC_CLASS + +config RTC_DRV_OMAP + tristate "TI OMAP1" + depends on RTC_CLASS && ( \ + ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 ) + help + Say "yes" here to support the real time clock on TI OMAP1 chips. + This driver can also be built as a module called rtc-omap. config RTC_DRV_S3C tristate "Samsung S3C series SoC RTC" @@ -253,16 +329,6 @@ config RTC_DRV_S3C 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 @@ -308,7 +374,7 @@ config RTC_DRV_PL031 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. + PrimeCell PL031 RTC found on certain ARM SOCs. To compile this driver as a module, choose M here: the module will be called rtc-pl031. @@ -319,39 +385,20 @@ config RTC_DRV_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 +config RTC_DRV_BFIN + tristate "Blackfin On-Chip RTC" + depends on RTC_CLASS && BFIN help If you say yes here you will get support for the - Maxim MAX6902 spi RTC chip. + Blackfin On-Chip Real Time Clock. This driver can also be built as a module. If so, the module - will be called rtc-max6902. + will be called rtc-bfin. -config RTC_DRV_V3020 - tristate "EM Microelectronic V3020" - depends on RTC_CLASS +config RTC_DRV_RS5C313 + tristate "Ricoh RS5C313" + depends on RTC_CLASS && SH_LANDISK 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. + If you say yes here you get support for the Ricoh RS5C313 RTC chips. endmenu |