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rtc: rv3028: add new driver

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Add a driver for the MicroCrystal RV-3028. It is a SMT Real-Time Clock
Module that incorporates an integrated CMOS circuit together with an XTAL.
It has an i2c interface.

The driver handles date/time, alarms, trickle charging, timestamping,
frequency offset correction, EEPROM and NVRAM.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni
2019-02-13 00:21:36 +01:00
parent 10e7122107
commit e6e7376cfd
4 changed files with 743 additions and 0 deletions
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1
Documentation/devicetree/bindings/rtc/rtc.txt
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@@ -52,6 +52,7 @@ emmicro,em3027 EM Microelectronic EM3027 Real-time Clock
isil,isl1208 Intersil ISL1208 Low Power RTC with Battery Backed SRAM
isil,isl1218 Intersil ISL1218 Low Power RTC with Battery Backed SRAM
isil,isl12022 Intersil ISL12022 Real-time Clock
microcrystal,rv3028 Real Time Clock Module with I2C-Bus
microcrystal,rv3029 Real Time Clock Module with I2C-Bus
microcrystal,rv8523 Real Time Clock
nxp,pcf2127 Real-time clock

9
drivers/rtc/Kconfig
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@@ -626,6 +626,15 @@ config RTC_DRV_EM3027
This driver can also be built as a module. If so, the module
will be called rtc-em3027.
config RTC_DRV_RV3028
tristate "Micro Crystal RV3028"
help
If you say yes here you get support for the Micro Crystal
RV3028.
This driver can also be built as a module. If so, the module
will be called rtc-rv3028.
config RTC_DRV_RV8803
tristate "Micro Crystal RV8803, Epson RX8900"
help

1
drivers/rtc/Makefile
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@@ -139,6 +139,7 @@ obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
obj-$(CONFIG_RTC_DRV_RTD119X) += rtc-rtd119x.o
obj-$(CONFIG_RTC_DRV_RV3028) += rtc-rv3028.o
obj-$(CONFIG_RTC_DRV_RV3029C2) += rtc-rv3029c2.o
obj-$(CONFIG_RTC_DRV_RV8803) += rtc-rv8803.o
obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o

732
drivers/rtc/rtc-rv3028.c Normal file
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