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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 20:08:34 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 20:08:34 -0800 |
commit | 030672aea826adf3dee9100ee8ac303b62c8fe7f (patch) | |
tree | c9815fcd276e4c61b864790e81e5cbca16b80142 /Documentation/devicetree/bindings/rtc/rtc.txt | |
parent | Merge tag 'gpio-v4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio (diff) | |
parent | of: __of_detach_node() - remove node from phandle cache (diff) | |
download | linux-dev-030672aea826adf3dee9100ee8ac303b62c8fe7f.tar.xz linux-dev-030672aea826adf3dee9100ee8ac303b62c8fe7f.zip |
Merge tag 'devicetree-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull Devicetree updates from Rob Herring:
"The biggest highlight here is the start of using json-schema for DT
bindings. Being able to validate bindings has been discussed for years
with little progress.
- Initial support for DT bindings using json-schema language. This is
the start of converting DT bindings from free-form text to a
structured format.
- Reworking of initrd address initialization. This moves to using the
phys address instead of virt addr in the DT parsing code. This
rework was motivated by CONFIG_DEV_BLK_INITRD causing unnecessary
rebuilding of lots of files.
- Fix stale phandle entries in phandle cache
- DT overlay validation improvements. This exposed several memory
leak bugs which have been fixed.
- Use node name and device_type helper functions in DT code
- Last remaining conversions to using %pOFn printk specifier instead
of device_node.name directly
- Create new common RTC binding doc and move all trivial RTC devices
out of trivial-devices.txt.
- New bindings for Freescale MAG3110 magnetometer, Cadence Sierra
PHY, and Xen shared memory
- Update dtc to upstream version v1.4.7-57-gf267e674d145"
* tag 'devicetree-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (68 commits)
of: __of_detach_node() - remove node from phandle cache
of: of_node_get()/of_node_put() nodes held in phandle cache
gpio-omap.txt: add reg and interrupts properties
dt-bindings: mrvl,intc: fix a trivial typo
dt-bindings: iio: magnetometer: add dt-bindings for freescale mag3110
dt-bindings: Convert trivial-devices.txt to json-schema
dt-bindings: arm: mrvl: amend Browstone compatible string
dt-bindings: arm: Convert Tegra board/soc bindings to json-schema
dt-bindings: arm: Convert ZTE board/soc bindings to json-schema
dt-bindings: arm: Add missing Xilinx boards
dt-bindings: arm: Convert Xilinx board/soc bindings to json-schema
dt-bindings: arm: Convert VIA board/soc bindings to json-schema
dt-bindings: arm: Convert ST STi board/soc bindings to json-schema
dt-bindings: arm: Convert SPEAr board/soc bindings to json-schema
dt-bindings: arm: Convert CSR SiRF board/soc bindings to json-schema
dt-bindings: arm: Convert QCom board/soc bindings to json-schema
dt-bindings: arm: Convert TI nspire board/soc bindings to json-schema
dt-bindings: arm: Convert TI davinci board/soc bindings to json-schema
dt-bindings: arm: Convert Calxeda board/soc bindings to json-schema
dt-bindings: arm: Convert Altera board/soc bindings to json-schema
...
Diffstat (limited to 'Documentation/devicetree/bindings/rtc/rtc.txt')
-rw-r--r-- | Documentation/devicetree/bindings/rtc/rtc.txt | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rtc/rtc.txt b/Documentation/devicetree/bindings/rtc/rtc.txt new file mode 100644 index 000000000000..7c8da6926095 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/rtc.txt @@ -0,0 +1,64 @@ +Generic device tree bindings for Real Time Clock devices +======================================================== + +This document describes generic bindings which can be used to describe Real Time +Clock devices in a device tree. + +Required properties +------------------- + +- compatible : name of RTC device following generic names recommended practice. + +For other required properties e.g. to describe register sets, +clocks, etc. check the binding documentation of the specific driver. + +Optional properties +------------------- + +- start-year : if provided, the default hardware range supported by the RTC is + shifted so the first usable year is the specified one. + +The following properties may not be supported by all drivers. However, if a +driver wants to support one of the below features, it should adapt the bindings +below. +- trickle-resistor-ohms : Selected resistor for trickle charger. Should be given + if trickle charger should be enabled +- trickle-diode-disable : Do not use internal trickle charger diode Should be + given if internal trickle charger diode should be + disabled +- wakeup-source : Enables wake up of host system on alarm + +Trivial RTCs +------------ + +This is a list of trivial RTC devices that have simple device tree +bindings, consisting only of a compatible field, an address and +possibly an interrupt line. + + +Compatible Vendor / Chip +========== ============= +abracon,abb5zes3 AB-RTCMC-32.768kHz-B5ZE-S3: Real Time Clock/Calendar Module with I2C Interface +dallas,ds1374 I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output +dallas,ds1672 Dallas DS1672 Real-time Clock +dallas,ds3232 Extremely Accurate I²C RTC with Integrated Crystal and SRAM +epson,rx8010 I2C-BUS INTERFACE REAL TIME CLOCK MODULE +epson,rx8581 I2C-BUS INTERFACE REAL TIME CLOCK MODULE +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,rv3029 Real Time Clock Module with I2C-Bus +nxp,pcf2127 Real-time clock +nxp,pcf2129 Real-time clock +nxp,pcf8523 Real-time Clock +nxp,pcf8563 Real-time clock/calendar +nxp,pcf85063 Tiny Real-Time Clock +pericom,pt7c4338 Real-time Clock Module +ricoh,r2025sd I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC +ricoh,r2221tl I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC +ricoh,rs5c372a I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC +ricoh,rs5c372b I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC +ricoh,rv5c386 I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC +ricoh,rv5c387a I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC +sii,s35390a 2-wire CMOS real-time clock |