linux-kernel - [PATCH] ARM: dts: ti/omap: omap4-epson-embt2ws: add charger

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Message-Id: <20241019111121.331477-1-andreas@kemnade.info>
Date: Sat, 19 Oct 2024 13:11:21 +0200
From: Andreas Kemnade <andreas@...nade.info>
To: tony@...mide.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	linux-omap@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	aaro.koskinen@....fi,
	khilman@...libre.com,
	Roger Quadros <rogerq@...nel.org>
Cc: Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH] ARM: dts: ti/omap: omap4-epson-embt2ws: add charger

Add charger and battery definition for the Epson Moverio BT-200 to make
charging working.

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 .../boot/dts/ti/omap/omap4-epson-embt2ws.dts  | 28 ++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
index 339e52ba3614b..5d4c10325b322 100644
--- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
+++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
@@ -17,6 +17,24 @@ memory@...00000 {
 		reg = <0x80000000 0x40000000>; /* 1024M */
 	};
 
+	battery: battery {
+		compatible = "simple-battery";
+		device-chemistry = "lithium-ion";
+		charge-full-design-microamp-hours = <2720000>;
+		voltage-max-design-microvolt = <4200000>;
+		voltage-min-design-microvolt = <3300000>;
+
+		constant-charge-voltage-max-microvolt = <4200000>;
+		/*
+		 * vendor kernel says max charge 1400000, input limit 900000
+		 * and charges only with dcp chargers. So it is unclear what
+		 * is really allowed. Play safe for now and restrict things
+		 * here. Maybe 900000 is just the limit of the vendor charger?
+		 */
+		constant-charge-current-max-microamp = <900000>;
+		charge-term-current-microamp = <200000>;
+	};
+
 	backlight-left {
 		compatible = "pwm-backlight";
 		pwms = <&twl_pwm 1 7812500>;
@@ -87,6 +105,14 @@ twl: pmic@48 {
 		#interrupt-cells = <1>;
 		system-power-controller;
 
+		charger {
+			compatible = "ti,twl6032-charger", "ti,twl6030-charger";
+			interrupts = <2>, <5>;
+			io-channels = <&gpadc 10>;
+			io-channel-names = "vusb";
+			monitored-battery = <&battery>;
+		};
+
 		rtc {
 			compatible = "ti,twl4030-rtc";
 			interrupts = <11>;
@@ -166,7 +192,7 @@ twl_pwmled: pwmled {
 			#pwm-cells = <2>;
 		};
 
-		gpadc {
+		gpadc: gpadc {
 			compatible = "ti,twl6032-gpadc";
 			interrupts = <3>;
 			#io-channel-cells = <1>;
-- 
2.39.2