bfebeb1672
Pull RTC updates from Alexandre Belloni: "It is now possible to add custom sysfs attributes while avoiding a possible race condition. Unused code has been removed resulting in a nice reduction of the code base. And more drivers have been switched to SPDX by their maintainers. Summary: Subsystem: - new helpers to add custom sysfs attributes - struct rtc_task removal along with rtc_irq_[un]register() - rtc_irq_set_state and rtc_irq_set_freq are not exported anymore Drivers: - armada38x: reset after rtc power loss - ds1307: now supports m41t11 - isl1208: now supports isl1219 and tamper detection - pcf2127: internal SRAM support" * tag 'rtc-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (34 commits) rtc: ds1307: simplify hwmon config rtc: s5m: Add SPDX license identifier rtc: maxim: Add SPDX license identifiers rtc: isl1219: add device tree documentation rtc: isl1208: set ev-evienb bit from device tree rtc: isl1208: Add "evdet" interrupt source for isl1219 rtc: isl1208: add support for isl1219 with tamper detection rtc: sysfs: facilitate attribute add to rtc device rtc: remove struct rtc_task char: rtc: remove task handling rtc: pcf85063: preserve control register value between stop and start rtc: sh: remove unused variable rtc_dev rtc: unexport rtc_irq_set_* rtc: simplify rtc_irq_set_state/rtc_irq_set_freq rtc: remove irq_task and irq_task_lock rtc: remove rtc_irq_register/rtc_irq_unregister rtc: sh: remove dead code rtc: sa1100: don't set PIE frequency rtc: ds1307: support m41t11 variant rtc: ds1307: fix data pointer to m41t0 ...
45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
Dallas DS1307 and compatible RTC
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Required properties:
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- compatible: should be one of:
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"dallas,ds1307",
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"dallas,ds1308",
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"dallas,ds1337",
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"dallas,ds1338",
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"dallas,ds1339",
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"dallas,ds1388",
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"dallas,ds1340",
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"dallas,ds1341",
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"maxim,ds3231",
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"st,m41t0",
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"st,m41t00",
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"st,m41t11",
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"microchip,mcp7940x",
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"microchip,mcp7941x",
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"pericom,pt7c4338",
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"epson,rx8025",
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"isil,isl12057"
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- reg: I2C bus address of the device
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Optional properties:
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- interrupts: rtc alarm interrupt.
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- clock-output-names: From common clock binding to override the default output
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clock name
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- wakeup-source: Enables wake up of host system on alarm
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- trickle-resistor-ohms : ds1339, ds1340 and ds 1388 only
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Selected resistor for trickle charger
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Possible values are 250, 2000, 4000
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Should be given if trickle charger should be enabled
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- trickle-diode-disable : ds1339, ds1340 and ds 1388 only
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Do not use internal trickle charger diode
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Should be given if internal trickle charger diode should be disabled
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Example:
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rtc1: ds1339@68 {
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compatible = "dallas,ds1339";
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reg = <0x68>;
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interrupt-parent = <&gpio4>;
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interrupts = <20 0>;
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trickle-resistor-ohms = <250>;
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};
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