1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
| Dallas DS1307 and compatible RTC
|
| Required properties:
| - compatible: should be one of:
| "dallas,ds1307",
| "dallas,ds1308",
| "dallas,ds1337",
| "dallas,ds1338",
| "dallas,ds1339",
| "dallas,ds1388",
| "dallas,ds1340",
| "dallas,ds1341",
| "maxim,ds3231",
| "st,m41t0",
| "st,m41t00",
| "st,m41t11",
| "microchip,mcp7940x",
| "microchip,mcp7941x",
| "pericom,pt7c4338",
| "epson,rx8025",
| "isil,isl12057"
| "epson,rx8130"
| - reg: I2C bus address of the device
|
| Optional properties:
| - interrupts: rtc alarm interrupt.
| - clock-output-names: From common clock binding to override the default output
| clock name
| - wakeup-source: Enables wake up of host system on alarm
| - trickle-resistor-ohms : ds1339, ds1340 and ds 1388 only
| Selected resistor for trickle charger
| Possible values are 250, 2000, 4000
| Should be given if trickle charger should be enabled
| - aux-voltage-chargeable: ds1339, ds1340, ds1388 and rx8130 only
| Tells whether the battery/supercap of the RTC (if any) is
| chargeable or not.
| Possible values are 0 (not chargeable), 1 (chargeable)
|
| Deprecated properties:
| - trickle-diode-disable : ds1339, ds1340 and ds1388 only
| Do not use internal trickle charger diode
| Should be given if internal trickle charger diode should be disabled
| (superseded by aux-voltage-chargeable)
|
| Example:
| ds1339: rtc@68 {
| compatible = "dallas,ds1339";
| reg = <0x68>;
| interrupt-parent = <&gpio4>;
| interrupts = <20 0>;
| trickle-resistor-ohms = <250>;
| };
|
|
