linux-kernel - [PATCH v3 1/2] dt-bindings: power: Add Spreadtrum SC2731 charger documentation

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Message-Id: <8a8d31119bc723a0012afa8e517015dbba68fee9.1537214465.git.baolin.wang@linaro.org>
Date:   Mon, 17 Sep 2018 13:03:30 -0700
From:   Baolin Wang <baolin.wang@...aro.org>
To:     sre@...nel.org, robh+dt@...nel.org, mark.rutland@....com
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, baolin.wang@...aro.org,
        broonie@...nel.org, yuanjiang.yu@...eadtrum.com, krzk@...nel.org
Subject: [PATCH v3 1/2] dt-bindings: power: Add Spreadtrum SC2731 charger documentation

This patch adds the binding documentation for Spreadtrum SC2731 charger
device.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
---
Changes from v2:
 - Add reviewed tag from Krzysztof.

Changes from v1:
 - Add parent node.
 - Add some battery standard properties.
---
 .../bindings/power/supply/sc2731_charger.txt       | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/sc2731_charger.txt

diff --git a/Documentation/devicetree/bindings/power/supply/sc2731_charger.txt b/Documentation/devicetree/bindings/power/supply/sc2731_charger.txt
new file mode 100644
index 0000000..5266fab
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/sc2731_charger.txt
@@ -0,0 +1,40 @@
+Spreadtrum SC2731 PMIC battery charger binding
+
+Required properties:
+ - compatible: Should be "sprd,sc2731-charger".
+ - reg: Address offset of charger register.
+ - phys: Contains a phandle to the USB phy.
+
+Optional Properties:
+- monitored-battery: phandle of battery characteristics devicetree node.
+  The charger uses the following battery properties:
+- charge-term-current-microamp: current for charge termination phase.
+- constant-charge-voltage-max-microvolt: maximum constant input voltage.
+  See Documentation/devicetree/bindings/power/supply/battery.txt
+
+Example:
+
+	bat: battery {
+		compatible = "simple-battery";
+		charge-term-current-microamp = <120000>;
+		constant-charge-voltage-max-microvolt = <4350000>;
+		......
+	};
+
+	sc2731_pmic: pmic@0 {
+		compatible = "sprd,sc2731";
+		reg = <0>;
+		spi-max-frequency = <26000000>;
+		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		charger@0 {
+			compatible = "sprd,sc2731-charger";
+			reg = <0x0>;
+			phys = <&ssphy>;
+			monitored-battery = <&bat>;
+		};
+	};
-- 
1.9.1