57e883b576
The Epson rx8571 is compatible with the Epson rx8581 RTC. The difference between the rx8571 and rx8581 RTC is that the former has 16 bytes more RAM. This renders them incompatible from a DT point of view. Signed-off-by: Biju Das <biju.das@bp.renesas.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
72 lines
3.3 KiB
Plaintext
72 lines
3.3 KiB
Plaintext
Generic device tree bindings for Real Time Clock devices
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========================================================
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This document describes generic bindings which can be used to describe Real Time
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Clock devices in a device tree.
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Required properties
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-------------------
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- compatible : name of RTC device following generic names recommended practice.
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For other required properties e.g. to describe register sets,
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clocks, etc. check the binding documentation of the specific driver.
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Optional properties
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-------------------
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- start-year : if provided, the default hardware range supported by the RTC is
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shifted so the first usable year is the specified one.
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The following properties may not be supported by all drivers. However, if a
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driver wants to support one of the below features, it should adapt the bindings
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below.
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- trickle-resistor-ohms : Selected resistor for trickle charger. Should be given
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if trickle charger should be enabled
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- trickle-diode-disable : Do not use internal trickle charger diode Should be
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given if internal trickle charger diode should be
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disabled
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- wakeup-source : Enables wake up of host system on alarm
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- quartz-load-femtofarads : The capacitive load of the quartz(x-tal),
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expressed in femto Farad (fF).
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The default value shall be listed (if optional),
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and likewise all valid values.
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Trivial RTCs
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------------
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This is a list of trivial RTC devices that have simple device tree
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bindings, consisting only of a compatible field, an address and
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possibly an interrupt line.
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Compatible Vendor / Chip
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========== =============
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abracon,abb5zes3 AB-RTCMC-32.768kHz-B5ZE-S3: Real Time Clock/Calendar Module with I2C Interface
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abracon,abeoz9 AB-RTCMC-32.768kHz-EOZ9: Real Time Clock/Calendar Module with I2C Interface
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dallas,ds1374 I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output
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dallas,ds1672 Dallas DS1672 Real-time Clock
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dallas,ds3232 Extremely Accurate I²C RTC with Integrated Crystal and SRAM
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epson,rx8010 I2C-BUS INTERFACE REAL TIME CLOCK MODULE
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epson,rx8571 I2C-BUS INTERFACE REAL TIME CLOCK MODULE with Battery Backed RAM
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epson,rx8581 I2C-BUS INTERFACE REAL TIME CLOCK MODULE
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emmicro,em3027 EM Microelectronic EM3027 Real-time Clock
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isil,isl1208 Intersil ISL1208 Low Power RTC with Battery Backed SRAM
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isil,isl1218 Intersil ISL1218 Low Power RTC with Battery Backed SRAM
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isil,isl12022 Intersil ISL12022 Real-time Clock
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microcrystal,rv3028 Real Time Clock Module with I2C-Bus
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microcrystal,rv3029 Real Time Clock Module with I2C-Bus
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microcrystal,rv8523 Real Time Clock
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nxp,pcf2127 Real-time clock
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nxp,pcf2129 Real-time clock
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nxp,pcf8563 Real-time clock/calendar
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pericom,pt7c4338 Real-time Clock Module
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ricoh,r2025sd I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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ricoh,r2221tl I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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ricoh,rs5c372a I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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ricoh,rs5c372b I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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ricoh,rv5c386 I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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ricoh,rv5c387a I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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sii,s35390a 2-wire CMOS real-time clock
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whwave,sd3078 I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
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