summaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-10 10:22:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-10 10:22:27 -0700
commitfbe173e3ffbd897b5a859020d714c0eaf4af2a1a (patch)
tree602fd9da34454d934fcee56b8a74ebed05ba7d1c /Documentation
parent5e630afdcb82779f5bf03fd4a5e86adc56fe7c8a (diff)
parent1485991c024603b2fb4ae77beb7a0d741128a48e (diff)
downloadlinux-fbe173e3ffbd897b5a859020d714c0eaf4af2a1a.tar.bz2
Merge tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni: "This contains a few series that have been in preparation for a while and that will help systems with RTCs that will fail in 2038, 2069 or 2100. Subsystem: - Add tracepoints - Rework of the RTC/nvmem API to allow drivers to discard struct nvmem_config after registration - New range API, drivers can now expose the useful range of the RTC - New offset API the core is now able to add an offset to the RTC time, modifying the supported range. - Multiple rtc_time64_to_tm fixes - Handle time_t overflow on 32 bit platforms in the core instead of letting drivers do crazy things. - remove rtc_control API New driver: - Intersil ISL12026 Drivers: - Drivers exposing the RTC non volatile memory have been converted to use nvmem - Removed useless time and date validation - Removed an indirection pattern that was a cargo cult from ancient drivers - Removed VLA usage - Fixed a possible race condition in probe functions - AB8540 support is dropped from ab8500 - pcf85363 now has alarm support" * tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (128 commits) rtc: snvs: Fix usage of snvs_rtc_enable rtc: mt7622: fix module autoloading for OF platform drivers rtc: isl12022: use true and false for boolean values rtc: ab8500: Drop AB8540 support rtc: remove a warning during scripts/kernel-doc step rtc: 88pm860x: remove artificial limitation rtc: 88pm80x: remove artificial limitation rtc: st-lpc: remove artificial limitation rtc: mrst: remove artificial limitation rtc: mv: remove artificial limitation rtc: hctosys: Ensure system time doesn't overflow time_t parisc: time: stop validating rtc_time in .read_time rtc: pcf85063: fix clearing bits in pcf85063_start_clock rtc: at91sam9: Set name of regmap_config rtc: s5m: Remove VLA usage rtc: s5m: Move enum from rtc.h to rtc-s5m.c rtc: remove VLA usage rtc: Add useful timestamp definitions rtc: Add one offset seconds to expand RTC range rtc: Factor out the RTC range validation into rtc_valid_range() ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-class-rtc16
-rw-r--r--Documentation/devicetree/bindings/rtc/isil,isl12026.txt28
2 files changed, 36 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-rtc b/Documentation/ABI/testing/sysfs-class-rtc
index cf60412882f0..95984289a4ee 100644
--- a/Documentation/ABI/testing/sysfs-class-rtc
+++ b/Documentation/ABI/testing/sysfs-class-rtc
@@ -43,6 +43,14 @@ Contact: linux-rtc@vger.kernel.org
Description:
(RO) The name of the RTC corresponding to this sysfs directory
+What: /sys/class/rtc/rtcX/range
+Date: January 2018
+KernelVersion: 4.16
+Contact: linux-rtc@vger.kernel.org
+Description:
+ Valid time range for the RTC, as seconds from epoch, formatted
+ as [min, max]
+
What: /sys/class/rtc/rtcX/since_epoch
Date: March 2006
KernelVersion: 2.6.17
@@ -57,14 +65,6 @@ Contact: linux-rtc@vger.kernel.org
Description:
(RO) RTC-provided time in 24-hour notation (hh:mm:ss)
-What: /sys/class/rtc/rtcX/*/nvmem
-Date: February 2016
-KernelVersion: 4.6
-Contact: linux-rtc@vger.kernel.org
-Description:
- (RW) The non volatile storage exported as a raw file, as
- described in Documentation/nvmem/nvmem.txt
-
What: /sys/class/rtc/rtcX/offset
Date: February 2016
KernelVersion: 4.6
diff --git a/Documentation/devicetree/bindings/rtc/isil,isl12026.txt b/Documentation/devicetree/bindings/rtc/isil,isl12026.txt
new file mode 100644
index 000000000000..2e0be45193bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/isil,isl12026.txt
@@ -0,0 +1,28 @@
+ISL12026 I2C RTC/EEPROM
+
+ISL12026 is an I2C RTC/EEPROM combination device. The RTC and control
+registers respond at bus address 0x6f, and the EEPROM array responds
+at bus address 0x57. The canonical "reg" value will be for the RTC portion.
+
+Required properties supported by the device:
+
+ - "compatible": must be "isil,isl12026"
+ - "reg": I2C bus address of the device (always 0x6f)
+
+Optional properties:
+
+ - "isil,pwr-bsw": If present PWR.BSW bit must be set to the specified
+ value for proper operation.
+
+ - "isil,pwr-sbib": If present PWR.SBIB bit must be set to the specified
+ value for proper operation.
+
+
+Example:
+
+ rtc@6f {
+ compatible = "isil,isl12026";
+ reg = <0x6f>;
+ isil,pwr-bsw = <0>;
+ isil,pwr-sbib = <1>;
+ }