linux-kernel - [PATCH v3 08/10] ARM: dts: samsung: exynos4212-tab3: Add battery node with charge current value

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Message-Id: <20240729-max77693-charger-extcon-v3-8-02315a6869d4@gmail.com>
Date: Mon, 29 Jul 2024 19:47:42 +0200
From: Artur Weber <aweber.kernel@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Chanwoo Choi <cw00.choi@...sung.com>
Cc: Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, linux-pm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 ~postmarketos/upstreaming@...ts.sr.ht, Henrik Grimler <henrik@...mler.se>, 
 Wolfgang Wiedmeyer <wolfgit@...dmeyer.de>, 
 Denis 'GNUtoo' Carikli <GNUtoo@...erdimension.org>, 
 Artur Weber <aweber.kernel@...il.com>
Subject: [PATCH v3 08/10] ARM: dts: samsung: exynos4212-tab3: Add battery
 node with charge current value

This value was verified by comparing register dumps of the MAX77693
charger with on mainline with a downstream kernel under Android; the
value on downstream was set to 1.8 amps when charging with a proper
charger.

Add it to a new battery node and pass it to the MAX77693 charger
so that the fast charge current setting can be used for charging.

Signed-off-by: Artur Weber <aweber.kernel@...il.com>
---
Changes in v2:
- Switched to monitored-battery
---
 arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi b/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi
index 9bc05961577d..3c905bfedd96 100644
--- a/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi
@@ -159,6 +159,7 @@ charger_reg: CHARGER {
 
 			charger {
 				compatible = "maxim,max77693-charger";
+				monitored-battery = <&battery>;
 
 				maxim,constant-microvolt = <4350000>;
 				maxim,min-system-microvolt = <3600000>;
@@ -300,6 +301,11 @@ submic_bias_reg: voltage-regulator-5 {
 		regulator-max-microvolt = <2800000>;
 	};
 
+	battery: battery {
+		compatible = "simple-battery";
+		constant-charge-current-max-microamp = <1800000>;
+	};
+
 	sound: sound {
 		compatible = "samsung,midas-audio";
 		model = "TAB3";

-- 
2.45.2