From: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Date: Fri, 15 Jan 2021 05:53:03 +0000 (+0800)
Subject: doc: device-tree-bindings: rtc: Abracon AB x80x i2c rtc
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=e89ef172f88118ce036eb46d660f857c9209b194;p=u-boot.git

doc: device-tree-bindings: rtc: Abracon AB x80x i2c rtc

Document the bindings for abracon,abx80x and related compatibles.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
---

diff --git a/doc/device-tree-bindings/rtc/abracon,abx80x.txt b/doc/device-tree-bindings/rtc/abracon,abx80x.txt
new file mode 100644
index 0000000000..2405e35a1b
--- /dev/null
+++ b/doc/device-tree-bindings/rtc/abracon,abx80x.txt
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+Abracon ABX80X I2C ultra low power RTC/Alarm chip
+
+The Abracon ABX80X family consist of the ab0801, ab0803, ab0804, ab0805, ab1801,
+ab1803, ab1804 and ab1805. The ab0805 is the superset of ab080x and the ab1805
+is the superset of ab180x.
+
+Required properties:
+
+ - "compatible": should one of:
+        "abracon,abx80x"
+        "abracon,ab0801"
+        "abracon,ab0803"
+        "abracon,ab0804"
+        "abracon,ab0805"
+        "abracon,ab1801"
+        "abracon,ab1803"
+        "abracon,ab1804"
+        "abracon,ab1805"
+        "microcrystal,rv1805"
+	Using "abracon,abx80x" will enable chip autodetection.
+ - "reg": I2C bus address of the device
+
+Optional properties:
+
+The abx804 and abx805 have a trickle charger that is able to charge the
+connected battery or supercap. Both the following properties have to be defined
+and valid to enable charging:
+
+ - "abracon,tc-diode": should be "standard" (0.6V) or "schottky" (0.3V)
+ - "abracon,tc-resistor": should be <0>, <3>, <6> or <11>. 0 disables the output
+                          resistor, the other values are in kOhm.