linux-kernel - [PATCH v4 2/2] dt-bindings: mfd: max8998: Add charger subnode binding

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Date:   Fri, 21 Jun 2019 13:56:02 +0200
From:   Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
To:     sre@...nel.org
Cc:     lee.jones@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Subject: [PATCH v4 2/2] dt-bindings: mfd: max8998: Add charger subnode binding

This patch adds devicetree bindings documentation for
battery charging controller as the subnode of MAX8998 PMIC.

Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
---
Changes from v3:
  - Property prefix should be maxim, not max8998
  - Describe what End of Charge in percent means

Changes from v2:
  - Make charge-restart-level-microvolt optional.
  - Make charge-timeout-hours optional.

Changes from v1:
  - Removed unneeded Fixes tag
  - Correct description of all charger values
  - Added missing property unit
---
 .../devicetree/bindings/mfd/max8998.txt       | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/max8998.txt b/Documentation/devicetree/bindings/mfd/max8998.txt
index 5f2f07c09c90..368f787d6079 100644
--- a/Documentation/devicetree/bindings/mfd/max8998.txt
+++ b/Documentation/devicetree/bindings/mfd/max8998.txt
@@ -48,6 +48,25 @@ Additional properties required if max8998,pmic-buck2-dvs-gpio is defined:
 - max8998,pmic-buck2-dvs-voltage: An array of 2 voltage values in microvolts
   for buck2 regulator that can be selected using dvs gpio.
 
+Charger: Configuration for battery charging controller should be added
+inside a child node named 'charger'.
+  Required properties:
+  - maxim,end-of-charge-percentage: End of Charge in percent.
+    When the charge current in constant-voltage phase drops below
+    end-of-charge-percentage of it's start value, charging is terminated.
+    If value equals 0, leave it unchanged. Otherwise it should be value
+    from 10 to 45 by 5 step.
+
+  Optional properties:
+  - maxim,charge-restart-threshold: Charge restart threshold in millivolts.
+    If property is not present, this will be disabled.
+    Valid values are: 0, 100, 150, 200. If the value equals 0, leave it
+    unchanged.
+
+  - maxim,charge-timeout: Charge timeout in hours. If property is not
+    present, this will be disabled. Valid values are: 0, 5, 6, 7.
+    If the value equals 0, leave it unchanged.
+
 Regulators: All the regulators of MAX8998 to be instantiated shall be
 listed in a child node named 'regulators'. Each regulator is represented
 by a child node of the 'regulators' node.
@@ -97,6 +116,13 @@ Example:
 		max8998,pmic-buck2-dvs-gpio = <&gpx0 0 3 0 0>; /* SET3 */
 		max8998,pmic-buck2-dvs-voltage = <1350000>, <1300000>;
 
+		/* Charger configuration */
+		charger {
+			maxim,end-of-charge-percentage = <20>;
+			maxim,charge-restart-threshold = <100>;
+			maxim,charge-timeout = <7>;
+		};
+
 		/* Regulators to instantiate */
 		regulators {
 			ldo2_reg: LDO2 {
-- 
2.17.1