From: Paul Kocialkowski <contact@paulk.fr>
To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com
Cc: Lee Jones <lee.jones@linaro.org>, Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>, Chen-Yu Tsai <wens@csie.org>,
        Russell King <linux@armlinux.org.uk>,
        Maxime Ripard <maxime.ripard@free-electrons.com>,
        Paul Kocialkowski <contact@paulk.fr>
Subject: [PATCH 1/3] dt-bindings: mfd: axp20x: Document backup battery charging property
Date: Sat, 30 Dec 2017 16:23:28 +0100
Message-Id: <20171230152330.28946-2-contact@paulk.fr>
In-Reply-To: <20171230152330.28946-1-contact@paulk.fr>
References: <20171230152330.28946-1-contact@paulk.fr>
Sender: linux-kernel-owner@vger.kernel.org
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This adds documentation for the "backup" property of the axp20x driver,
that controls the charging mechanism for the backup battery on axp20x.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>

diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt
index 9455503b0299..382776b29932 100644
--- a/Documentation/devicetree/bindings/mfd/axp20x.txt
+++ b/Documentation/devicetree/bindings/mfd/axp20x.txt
@@ -58,6 +58,11 @@ Optional properties:
 	      See Documentation/devicetree/bindings/regulator/regulator.txt
 	      for more information on standard regulator bindings.
 
+- backup: An array of two integers for backup battery charging (axp20x-only),
+	  describing the charging voltage in mV first and the charging current
+	  in uA second. Backup battery charging is only enabled when these two
+	  fields are filled.
+
 Optional properties for DCDC regulators:
 - x-powers,dcdc-workmode: 1 for PWM mode, 0 for AUTO (PWM/PFM) mode
 			  Default: Current hardware setting
@@ -256,4 +261,6 @@ axp209: pmic@34 {
 			/* unused but preferred to be managed by OS */
 		};
 	};
+
+	backup = <3000 200>;
 };
-- 
2.15.1