linux-kernel - [PATCH] dt-bindings: power: New bindings for ltc3651-charger

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Date:   Fri,  5 May 2017 08:38:35 +0200
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     devicetree@...r.kernel.org
Cc:     sre@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        mark.rutland@....com, Mike Looijmans <mike.looijmans@...ic.nl>
Subject: [PATCH] dt-bindings: power: New bindings for ltc3651-charger

This adds the devicetree bindings documentation for the LTC3651 battery charger.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
---
 .../bindings/power/supply/ltc3651-charger.txt      | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt

diff --git a/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt b/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt
new file mode 100644
index 0000000..a7dd80f
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt
@@ -0,0 +1,26 @@
+ltc3651-charger
+
+Required properties:
+ - compatible: "lltc,ltc3651-charger"
+ - acpr-gpios: Connect to ACPR output. See remark below.
+
+Optional properties:
+ - fault-gpios: Connect to FAULT output. See remark below.
+ - chrg-gpios: Connect to CHRG output. See remark below.
+
+The ltc3651 outputs are open-drain type and active low. The driver assumes the
+GPIO reports "active" when the output is asserted, so if the pins have been
+connected directly, the GPIO flags should be set to active low also.
+
+The driver will attempt to aquire interrupts for all GPIOs. If the system is
+not capabale of providing that, the driver cannot report changes and userspace
+will need to periodically read the sysfs attributes to detect changes.
+
+Example:
+
+	charger: battery-charger {
+		compatible = "lltc,ltc3651-charger";
+		acpr-gpios = <&gpio0 68 GPIO_ACTIVE_LOW>;
+		fault-gpios = <&gpio0 64 GPIO_ACTIVE_LOW>;
+		chrg-gpios = <&gpio0 63 GPIO_ACTIVE_LOW>;
+	};
-- 
1.9.1