3b053f6919
The EOZ9 RTC has a similar register interface like the MCP7940M (and quite some other I2C RTCs). This commit: * Extracts the generic parts from MCP7940M and moves it into a generic i2c-rtc driver. * Uses the new i2c-rtc for the MCP7940M. * Uses the new i2c-rtc for the new Abracom EOZ9.
Real Time Clock
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It would be nice to utilize the interrupt capabilities of some RTC parts. This could be used to trigger checking the software clock against the hardware clock.
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The periodic capability of most RTCs is not suitable for use as a general purpose flexible clock tick source. For example, many RTCs generate only a handful of periods with 100 Hz being the most frequent.
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The tick field is not set on get. Anything smaller than a second is ignored on set and get operations.
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Day of week is ignored since RTEMS does not set it internally.
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There is no attempt in RTEMS to know about time zones.
Harris ICM7170
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Tested on a DMV177.
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Interrupt capabilities are ignored.
Mostek 48T08
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Untested.
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NVRAM is ignored.
ds1643
The Mostek M48T08 is compatible with the Dallas Semiconductor DS1643. Please use that driver.
icm7170 Configuration Table Use
sDeviceName
The name of this device.
deviceType
This field must be RTC_ICM7170.
pDeviceFns
The device interface control table. This must be icm7170_fns.
deviceProbe
This is the address of the routine which probes to see if the device is present.
pDeviceParams
This field specifies the clock frequency. It may be one of the
following:
ICM7170_AT_32_KHZ
ICM7170_AT_1_MHZ
ICM7170_AT_2_MHZ
ICM7170_AT_4_MHZ
ulCtrlPort1
This field is the base address of the RTC area of the chip.
ulCtrlPort2
This field is ignored.
ulDataPort
This field is ignored.
getRegister setRegister
These follow standard conventions.
m48t08 Configuration Table Use
sDeviceName
The name of this device.
deviceType
This field must be RTC_M48T08.
pDeviceFns
The device interface control table. This must be m48t08_fns.
deviceProbe
This is the address of the routine which probes to see if the device is present.
pDeviceParams
This is ignored and should be NULL.
ulCtrlPort1
This field is the base address of the RTC area of the chip. The NVRAM portion of the chip is ignored.
ulCtrlPort2
This field is ignored.
ulDataPort
This field is ignored.
getRegister setRegister
These follow standard conventions.
m48t18
This is supported by the m48t08 driver.
mc146818a
This is supported by the mc146818a driver.